| Abies religiosa | (Kunth) Schltdl. & Cham. | Pinaceae | 8 |
| Abutilon abutiloides | (Jacq.) Garcke ex Hochr. | Malvaceae | 8 |
| Abutilon divaricatum | Turcz. | Malvaceae | 8 |
| Abutilon fruticosum | Guill. & Perr. | Malvaceae | 8 |
| Abutilon hypoleucum | A.Gray | Malvaceae | 8 |
| Abutilon reventum | S.Watson | Malvaceae | 8 |
| Abutilon trisulcatum | Urb. | Malvaceae | 8 |
| Abutilon viscosum | (L.) Dorr | Malvaceae | 8 |
| Acaciella angustissima | (Mill.) Britton & Rose | Fabaceae | 8 |
| Acaena elongata | L. | Rosaceae | 8 |
| Acalypha arvensis | Poepp. | Euphorbiaceae | 8 |
| Acalypha cincta | Müll.Arg. | Euphorbiaceae | 8 |
| Acalypha mexicana | Müll.Arg. | Euphorbiaceae | 8 |
| Acalypha monostachya | Cav. | Euphorbiaceae | 8 |
| Acalypha persimilis | Müll.Arg. | Euphorbiaceae | 8 |
| Acalypha phleoides | Cav. | Euphorbiaceae | 8 |
| Acalypha poiretii | Spreng. | Euphorbiaceae | 8 |
| Acalypha radians | Torr. | Euphorbiaceae | 8 |
| Acalypha setosa | A.Rich. | Euphorbiaceae | 8 |
| Acanthocereus tetragonus | (L.) Hummelinck | Cactaceae | 8 |
| Acer negundo | L. | Sapindaceae | 8 |
| Achimenes antirrhina | (DC.) C.V.Morton | Gesneriaceae | 8 |
| Achimenes erecta | (Lam.) H.P.Fuchs | Gesneriaceae | 8 |
| Achimenes grandiflora | (Schiede) DC. | Gesneriaceae | 8 |
| Achimenes heterophylla | (Mart.) DC. | Gesneriaceae | 8 |
| Acianthera pubescens | (Lindl.) Pridgeon & M.W.Chase | Orchidaceae | 8 |
| Acmella radicans | (Jacq.) R.K.Jansen | Asteraceae | 8 |
| Acmella repens | Rich. ex Pers. | Asteraceae | 8 |
| Acmispon oroboides | (Kunth) Brouillet | Fabaceae | 8 |
| Acourtia moschata | (Lex.) DC. | Asteraceae | 8 |
| Acourtia wislizeni | (A.Gray) Reveal & R.M.King | Asteraceae | 8 |
| Adenophyllum aurantium | (L.) Strother | Asteraceae | 8 |
| Adenophyllum glandulosum | (Cav.) Strother | Asteraceae | 8 |
| Adenophyllum wrightii | A.Gray | Asteraceae | 8 |
| Adiantopsis radiata | (L.) Fée | Pteridaceae | 8 |
| Adiantum amplum | C.Presl | Pteridaceae | 8 |
| Adiantum andicola | Liebm. | Pteridaceae | 8 |
| Adiantum braunii | Mett. | Pteridaceae | 8 |
| Adiantum capillus-veneris | L. | Pteridaceae | 8 |
| Adiantum concinnum | Humb. & Bonpl. ex Willd. | Pteridaceae | 8 |
| Adiantum macrophyllum | Sw. | Pteridaceae | 8 |
| Adiantum poiretii | Wikstr. | Pteridaceae | 8 |
| Adiantum raddianum | C.Presl | Pteridaceae | 8 |
| Adiantum tenerum | Sw. | Pteridaceae | 8 |
| Adiantum trapeziforme | L. | Pteridaceae | 8 |
| Adiantum tricholepis | Fée | Pteridaceae | 8 |
| Adolphia infesta | (Kunth) Meisn. | Rhamnaceae | 8 |
| Aechmea bracteata | (Sw.) Griseb. | Bromeliaceae | 8 |
| Aechmea magdalenae | (André) André ex Baker | Bromeliaceae | 8 |
| Aechmea mexicana | Baker | Bromeliaceae | 8 |
| Aechmea nudicaulis | (L.) Griseb. | Bromeliaceae | 8 |
| Aeschynomene americana | L. | Fabaceae | 8 |
| Aeschynomene villosa | Poir. | Fabaceae | 8 |
| Agastache mexicana | (Kunth) Lint & Epling | Lamiaceae | 8 |
| Agave americana | L. | Asparagaceae | 8 |
| Agave angustiarum | Trel. | Asparagaceae | 8 |
| Agave angustifolia | Haw. | Asparagaceae | 8 |
| Agave atrovirens | Karw. ex Salm-Dyck | Asparagaceae | 8 |
| Agave attenuata | Salm-Dyck | Asparagaceae | 8 |
| Agave debilis | A.Berger | Asparagaceae | 8 |
| Agave horrida | Lem. ex Jacobi | Asparagaceae | 8 |
| Agave inaequidens | K.Koch | Asparagaceae | 8 |
| Agave karwinskii | Zucc. | Asparagaceae | 8 |
| Agave kerchovei | Lem. | Asparagaceae | 8 |
| Agave lechuguilla | Torr. | Asparagaceae | 8 |
| Agave mapisaga | Trel. | Asparagaceae | 8 |
| Agave marmorata | Roezl | Asparagaceae | 8 |
| Agave mitis | Mart. | Asparagaceae | 8 |
| Agave potatorum | Zucc. | Asparagaceae | 8 |
| Agave salmiana | Otto ex Salm-Dyck | Asparagaceae | 8 |
| Agave variegata | Jacobi | Asparagaceae | 8 |
| Ageratina adenophora | (Spreng.) R.M.King & H.Rob. | Asteraceae | 8 |
| Ageratina areolaris | (DC.) D.Gage ex B.L.Turner | Asteraceae | 8 |
| Ageratina glabrata | (Kunth) R.M.King & H.Rob. | Asteraceae | 8 |
| Ageratina ligustrina | (DC.) R.M.King & H.Rob. | Asteraceae | 8 |
| Ageratina mairetiana | (DC.) R.M.King & H.Rob. | Asteraceae | 8 |
| Ageratina petiolaris | (Moc. & Sessé ex DC.) R.M.King & H.Rob. | Asteraceae | 8 |
| Ageratina pichinchensis | (Kunth) R.M.King & H.Rob. | Asteraceae | 8 |
| Ageratina riparia | (Regel) R.M.King & H.Rob. | Asteraceae | 8 |
| Ageratina tomentella | (Schrad.) R.M.King & H.Rob. | Asteraceae | 8 |
| Ageratina wrightii | (A.Gray) R.M.King & H.Rob. | Asteraceae | 8 |
| Ageratum conyzoides | L. | Asteraceae | 8 |
| Ageratum corymbosum | Zucc. ex Pers. | Asteraceae | 8 |
| Ageratum houstonianum | Mill. | Asteraceae | 8 |
| Agonandra racemosa | (DC.) Standl. | Opiliaceae | 8 |
| Agrimonia striata | Michx. | Rosaceae | 8 |
| Agrostis hyemalis | (Walter) Britton, Sterns & Poggenb. | Poaceae | 8 |
| Agrostis perennans | (Walter) Tuck. | Poaceae | 8 |
| Agrostis scabra | Willd. | Poaceae | 8 |
| Alchemilla orbiculata | Ruiz & Pav. | Rosaceae | 8 |
| Alchemilla pectinata | Kunth | Rosaceae | 8 |
| Alchemilla pinnata | Ruiz & Pav. | Rosaceae | 8 |
| Alchornea latifolia | Sw. | Euphorbiaceae | 8 |
| Aldama dentata | La Llave | Asteraceae | 8 |
| Allionia choisyi | Standl. | Nyctaginaceae | 8 |
| Allionia incarnata | L. | Nyctaginaceae | 8 |
| Allium longifolium | (Kunth) Spreng. | Amaryllidaceae | 8 |
| Alloispermum integrifolium | (DC.) H.Rob. | Asteraceae | 8 |
| Allophylus racemosus | Sw. | Sapindaceae | 8 |
| Alnus acuminata | Kunth | Betulaceae | 8 |
| Alnus jorullensis | Kunth | Betulaceae | 8 |
| Alonsoa meridionalis | (L.f.) Kuntze | Scrophulariaceae | 8 |
| Aloysia gratissima | (Gillies & Hook.) Tronc. | Verbenaceae | 8 |
| Aloysia macrostachya | (Torr.) Moldenke | Verbenaceae | 8 |
| Alsophila firma | (Baker) D.S.Conant | Cyatheaceae | 8 |
| Alstonia longifolia | (A.DC.) Pichon | Apocynaceae | 8 |
| Alternanthera brasiliana | (L.) Kuntze | Amaranthaceae | 8 |
| Alternanthera caracasana | Kunth | Amaranthaceae | 8 |
| Alternanthera pungens | Kunth | Amaranthaceae | 8 |
| Alvaradoa amorphoides | Liebm. | Picramniaceae | 8 |
| Amaranthus cruentus | L. | Amaranthaceae | 8 |
| Amaranthus hybridus | L. | Amaranthaceae | 8 |
| Amaranthus hypochondriacus | L. | Amaranthaceae | 8 |
| Amaranthus palmeri | S.Watson | Amaranthaceae | 8 |
| Amaranthus powellii | S.Watson | Amaranthaceae | 8 |
| Amaranthus retroflexus | L. | Amaranthaceae | 8 |
| Amaranthus spinosus | L. | Amaranthaceae | 8 |
| Amaranthus viridis | L. | Amaranthaceae | 8 |
| Amaranthus watsonii | Standl. | Amaranthaceae | 8 |
| Ambrosia confertiflora | DC. | Asteraceae | 8 |
| Ambrosia psilostachya | DC. | Asteraceae | 8 |
| Amicia zygomeris | DC. | Fabaceae | 8 |
| Ammannia auriculata | Willd. | Lythraceae | 8 |
| Ammannia coccinea | Rottb. | Lythraceae | 8 |
| Ampelocissus acapulcensis | (Kunth) Planch. | Vitaceae | 8 |
| Ampelopsis cordata | Michx. | Vitaceae | 8 |
| Ampelopsis denudata | Planch. | Vitaceae | 8 |
| Amphicarpaea bracteata | (L.) Fernald | Fabaceae | 8 |
| Amphilophium crucigerum | (L.) L.G.Lohmann | Bignoniaceae | 8 |
| Amphipterygium adstringens | (Schltdl.) Schiede ex Standl. | Anacardiaceae | 8 |
| Amphiscirpus nevadensis | (S.Watson) Oteng-Yeb. | Cyperaceae | 8 |
| Andira galeottiana | Standl. | Fabaceae | 8 |
| Andropogon bicornis | L. | Poaceae | 8 |
| Andropogon cirratus | Hack. | Poaceae | 8 |
| Andropogon virginicus | L. | Poaceae | 8 |
| Anemia adiantifolia | (L.) Sw. | Anemiaceae | 8 |
| Anemia phyllitidis | (L.) Sw. | Anemiaceae | 8 |
| Anemia tomentosa | (Savigny) Sw. | Anemiaceae | 8 |
| Anemopsis californica | (Nutt.) Hook. & Arn. | Saururaceae | 8 |
| Angelonia angustifolia | Benth. | Plantaginaceae | 8 |
| Anisacanthus quadrifidus | (Vahl) Nees | Acanthaceae | 8 |
| Annona globiflora | Schltdl. | Annonaceae | 8 |
| Annona longiflora | S.Watson | Annonaceae | 8 |
| Annona macroprophyllata | Donn.Sm. | Annonaceae | 8 |
| Annona mucosa | Jacq. | Annonaceae | 8 |
| Annona purpurea | Moc. & Sessé ex Dunal | Annonaceae | 8 |
| Annona reticulata | L. | Annonaceae | 8 |
| Annona squamosa | L. | Annonaceae | 8 |
| Anoda acerifolia | Cav. | Malvaceae | 8 |
| Anoda crenatiflora | Ortega | Malvaceae | 8 |
| Anoda cristata | (L.) Schltdl. | Malvaceae | 8 |
| Anoda lanceolata | Hook. & Arn. | Malvaceae | 8 |
| Anoda pentaschista | A.Gray | Malvaceae | 8 |
| Anogramma leptophylla | (L.) Link | Pteridaceae | 8 |
| Anredera vesicaria | (Lam.) C.F.Gaertn. | Basellaceae | 8 |
| Anthurium pentaphyllum | (Aubl.) G.Don | Araceae | 8 |
| Anthurium scandens | (Aubl.) Engl. | Araceae | 8 |
| Anticlea frigida | (Schltdl. & Cham.) Zomlefer & Judd | Melanthiaceae | 8 |
| Anticlea virescens | (Kunth) Rydb. | Melanthiaceae | 8 |
| Antigonon leptopus | Hook. & Arn. | Polygonaceae | 8 |
| Apeiba tibourbou | Aubl. | Malvaceae | 8 |
| Aphanostephus ramosissimus | DC. | Asteraceae | 8 |
| Aphelandra aurantiaca | (Scheidw.) Lindl. | Acanthaceae | 8 |
| Apodanthera aspera | Cogn. | Cucurbitaceae | 8 |
| Apteria aphylla | (Nutt.) Barnhart ex Small | Burmanniaceae | 8 |
| Arachnothryx buddleioides | (Benth.) Planch. | Rubiaceae | 8 |
| Arachnothryx leucophylla | (Kunth) Planch. | Rubiaceae | 8 |
| Aralia humilis | Cav. | Araliaceae | 8 |
| Arbutus arizonica | (A.Gray) Sarg. | Ericaceae | 8 |
| Arbutus bicolor | S.González, M.González & P.D.Sørensen | Ericaceae | 8 |
| Arbutus tessellata | P.D.Sørensen | Ericaceae | 8 |
| Arbutus xalapensis | Kunth | Ericaceae | 8 |
| Arceuthobium globosum | Hawksw. & Wiens | Santalaceae | 8 |
| Arceuthobium vaginatum | (Humb. & Bonpl. ex Willd.) J.Presl | Santalaceae | 8 |
| Archibaccharis auriculata | (Hemsl.) G.L.Nesom | Asteraceae | 8 |
| Archibaccharis serratifolia | S.F.Blake | Asteraceae | 8 |
| Arctostaphylos pungens | Kunth | Ericaceae | 8 |
| Arcytophyllum serpyllaceum | (Schltdl.) Terrell | Rubiaceae | 8 |
| Ardisia compressa | Kunth | Primulaceae | 8 |
| Ardisia escallonioides | Schltdl. & Cham. | Primulaceae | 8 |
| Ardisia revoluta | Kunth | Primulaceae | 8 |
| Arenaria bryoides | D.F.K.Schltdl. | Caryophyllaceae | 8 |
| Arenaria lanuginosa | (Michx.) Rohrb. | Caryophyllaceae | 8 |
| Arenaria lycopodioides | Willd. ex D.F.K.Schltdl. | Caryophyllaceae | 8 |
| Arenaria paludicola | B.L.Rob. | Caryophyllaceae | 8 |
| Argemone mexicana | L. | Papaveraceae | 8 |
| Argemone ochroleuca | Sweet | Papaveraceae | 8 |
| Argemone platyceras | Link & Otto | Papaveraceae | 8 |
| Aristida adscensionis | L. | Poaceae | 8 |
| Aristida arizonica | Vasey | Poaceae | 8 |
| Aristida divaricata | Humb. & Bonpl. ex Willd. | Poaceae | 8 |
| Aristida pansa | Wooton & Standl. | Poaceae | 8 |
| Aristida purpurea | Nutt. | Poaceae | 8 |
| Aristida ternipes | Cav. | Poaceae | 8 |
| Aristolochia foetida | Kunth | Aristolochiaceae | 8 |
| Aristolochia pilosa | Kunth | Aristolochiaceae | 8 |
| Aristolochia taliscana | Hook. & Arn. | Aristolochiaceae | 8 |
| Aristolochia tentaculata | O.C.Schmidt | Aristolochiaceae | 8 |
| Aristolochia versabilifolia | Pfeifer | Aristolochiaceae | 8 |
| Arracacia aegopodioides | (Kunth) J.M.Coult. & Rose | Apiaceae | 8 |
| Artemisia dracunculus | L. | Asteraceae | 8 |
| Artemisia ludoviciana | Nutt. | Asteraceae | 8 |
| Arthrostemma ciliatum | Pav. ex D.Don | Melastomataceae | 8 |
| Asclepias angustifolia | Schweigg. | Apocynaceae | 8 |
| Asclepias curassavica | L. | Apocynaceae | 8 |
| Asclepias fournieri | Woodson | Apocynaceae | 8 |
| Asclepias glaucescens | Kunth | Apocynaceae | 8 |
| Asclepias linaria | Cav. | Apocynaceae | 8 |
| Asclepias oenotheroides | Schltdl. & Cham. | Apocynaceae | 8 |
| Asclepias otarioides | E.Fourn. | Apocynaceae | 8 |
| Asclepias pellucida | E.Fourn. | Apocynaceae | 8 |
| Asclepias senecionifolia | M.E.Jones | Apocynaceae | 8 |
| Asclepias similis | Hemsl. | Apocynaceae | 8 |
| Aspicarpa albida | (Cham. & Schltdl.) Hassl. | Malpighiaceae | 8 |
| Aspicarpa cynanchoides | (Kunth) Hassl. | Malpighiaceae | 8 |
| Aspicarpa hirtella | Rich. | Malpighiaceae | 8 |
| Asplenium fragrans | Sw. | Aspleniaceae | 8 |
| Asplenium monanthes | L. | Aspleniaceae | 8 |
| Asplenium praemorsum | Sw. | Aspleniaceae | 8 |
| Asplenium resiliens | Kunze | Aspleniaceae | 8 |
| Asplenium serra | Langsd. & Fisch. | Aspleniaceae | 8 |
| Aster moranensis | Kunth | Asteraceae | 8 |
| Asterohyptis stellulata | (Benth.) Epling | Lamiaceae | 8 |
| Astianthus viminalis | (Kunth) Baill. | Bignoniaceae | 8 |
| Astraea lobata | (L.) Klotzsch | Euphorbiaceae | 8 |
| Astragalus mollissimus | Torr. | Fabaceae | 8 |
| Astragalus nuttallianus | DC. | Fabaceae | 8 |
| Astragalus wootonii | E.Sheld. | Fabaceae | 8 |
| Astranthium xanthocomoides | (Less.) Larsen | Asteraceae | 8 |
| Astrolepis integerrima | (Hook.) D.M.Benham & Windham | Pteridaceae | 8 |
| Astrolepis sinuata | (Lag. ex Sw.) D.M.Benham & Windham | Pteridaceae | 8 |
| Atriplex canescens | (Pursh) Nutt. | Chenopodiaceae | 8 |
| Augusta rivalis | (Benth.) J.H.Kirkbr. | Rubiaceae | 8 |
| Aulosepalum pyramidale | (Lindl.) M.A.Dix & M.W.Dix | Orchidaceae | 8 |
| Axonopus compressus | (Sw.) P.Beauv. | Poaceae | 8 |
| Axonopus fissifolius | (Raddi) Kuhlm. | Poaceae | 8 |
| Ayenia aculeata | (Jacq.) Christenh. & Byng | Malvaceae | 8 |
| Ayenia micrantha | Standl. | Malvaceae | 8 |
| Ayenia ovata | Hemsl. | Malvaceae | 8 |
| Azolla filiculoides | Lam. | Salviniaceae | 8 |
| Baccharis conferta | Kunth | Asteraceae | 8 |
| Baccharis heterophylla | Kunth | Asteraceae | 8 |
| Baccharis pteronioides | DC. | Asteraceae | 8 |
| Baccharis salicifolia | (Ruiz & Pav.) Pers. | Asteraceae | 8 |
| Baccharis thesioides | Kunth | Asteraceae | 8 |
| Baccharis trinervis | Pers. | Asteraceae | 8 |
| Bacopa monnieri | (L.) Wettst. | Plantaginaceae | 8 |
| Barkleyanthus salicifolius | (Kunth) H.Rob. & Brettell | Asteraceae | 8 |
| Barleria oenotheroides | Dum.Cours. | Acanthaceae | 8 |
| Bartlettina sordida | (Less.) R.M.King & H.Rob. | Asteraceae | 8 |
| Bartlettina tuerckheimii | (Klatt) R.M.King & H.Rob. | Asteraceae | 8 |
| Bauhinia divaricata | L. | Fabaceae | 8 |
| Bauhinia pauletia | Pers. | Fabaceae | 8 |
| Bauhinia ungulata | L. | Fabaceae | 8 |
| Beaucarnea gracilis | Lem. | Asparagaceae | 8 |
| Begonia balmisiana | F.X.d.Bálmis | Begoniaceae | 8 |
| Begonia fischeri | Schrank | Begoniaceae | 8 |
| Begonia glabra | Aubl. | Begoniaceae | 8 |
| Begonia gracilis | Kunth | Begoniaceae | 8 |
| Begonia heracleifolia | Schltdl. & Cham. | Begoniaceae | 8 |
| Begonia incarnata | Link & Otto | Begoniaceae | 8 |
| Begonia monophylla | Pav. ex A.DC. | Begoniaceae | 8 |
| Begonia nelumbiifolia | Schltdl. & Cham. | Begoniaceae | 8 |
| Begonia plebeja | Liebm. | Begoniaceae | 8 |
| Bejaria aestuans | Mutis | Ericaceae | 8 |
| Beloglottis costaricensis | (Rchb.f.) Schltr. | Orchidaceae | 8 |
| Berula erecta | (Huds.) Coville | Apiaceae | 8 |
| Beschorneria yuccoides | K.Koch | Asparagaceae | 8 |
| Bessera elegans | Schult.f. | Asparagaceae | 8 |
| Bidens aequisquama | (Fernald) Sherff | Asteraceae | 8 |
| Bidens alba | DC. | Asteraceae | 8 |
| Bidens aurea | (Aiton) Sherff | Asteraceae | 8 |
| Bidens ballsii | Sherff | Asteraceae | 8 |
| Bidens bigelovii | A.Gray | Asteraceae | 8 |
| Bidens laevis | (L.) Britton, Sterns & Poggenb. | Asteraceae | 8 |
| Bidens ostruthioides | Sch.Bip. | Asteraceae | 8 |
| Bidens pilosa | L. | Asteraceae | 8 |
| Bidens reptans | G.Don | Asteraceae | 8 |
| Bidens serrulata | (Poir.) Desf. | Asteraceae | 8 |
| Bidens triplinervia | Kunth | Asteraceae | 8 |
| Bixa orellana | L. | Bixaceae | 8 |
| Blechnum appendiculatum | Willd. | Blechnaceae | 8 |
| Blechnum occidentale | L. | Blechnaceae | 8 |
| Bletia campanulata | Lex. | Orchidaceae | 8 |
| Bletia gracilis | G.Lodd. | Orchidaceae | 8 |
| Bletia mexicana | (Greenm.) Sosa & M.W.Chase | Orchidaceae | 8 |
| Bletia parkinsonii | Hook. | Orchidaceae | 8 |
| Bletia purpurata | A.Rich. & Galeotti | Orchidaceae | 8 |
| Bletia purpurea | (Lam.) A.DC. | Orchidaceae | 8 |
| Bletia roezlii | Rchb.f. | Orchidaceae | 8 |
| Blumea viscosa | (Mill.) V.M.Badillo | Asteraceae | 8 |
| Bocconia arborea | S.Watson | Papaveraceae | 8 |
| Bocconia frutescens | L. | Papaveraceae | 8 |
| Boehmeria caudata | Sw. | Urticaceae | 8 |
| Boehmeria cylindrica | (L.) Sw. | Urticaceae | 8 |
| Boerhavia coccinea | Mill. | Nyctaginaceae | 8 |
| Boerhavia diffusa | L. | Nyctaginaceae | 8 |
| Boerhavia erecta | L. | Nyctaginaceae | 8 |
| Boerhavia gracillima | Heimerl | Nyctaginaceae | 8 |
| Boerhavia scandens | L. | Nyctaginaceae | 8 |
| Boerhavia triquetra | S.Watson | Nyctaginaceae | 8 |
| Bolboschoenus maritimus | (L.) Palla | Cyperaceae | 8 |
| Bomarea acutifolia | Herb. | Alstroemeriaceae | 8 |
| Bomarea edulis | (Tussac) Herb. | Alstroemeriaceae | 8 |
| Bommeria hispida | Underw. | Pteridaceae | 8 |
| Bommeria pedata | (Sw.) Fourn. | Pteridaceae | 8 |
| Bonellia macrocarpa | (Cav.) B.Ståhl & Källersjö | Primulaceae | 8 |
| Bonplandia geminiflora | Cav. | Polemoniaceae | 8 |
| Borrichia frutescens | (L.) DC. | Asteraceae | 8 |
| Bothriochloa barbinodis | (Lag.) Herter | Poaceae | 8 |
| Bothriochloa hirtifolia | (J.Presl) Henrard | Poaceae | 8 |
| Bothriochloa laguroides | (DC.) Herter | Poaceae | 8 |
| Botrypus virginianus | (L.) Michx. | Ophioglossaceae | 8 |
| Bouchea prismatica | (L.) Kuntze | Verbenaceae | 8 |
| Bouchetia erecta | Dunal | Solanaceae | 8 |
| Bourreria huanita | Hemsl. | Ehretiaceae | 8 |
| Bouteloua aristidoides | (Kunth) Griseb. | Poaceae | 8 |
| Bouteloua chondrosioides | (Kunth) Benth. ex S.Watson | Poaceae | 8 |
| Bouteloua curtipendula | (Michx.) Torr. | Poaceae | 8 |
| Bouteloua dactyloides | (Nutt.) Columbus | Poaceae | 8 |
| Bouteloua gracilis | (Kunth) Lag. ex Griffiths | Poaceae | 8 |
| Bouteloua hirsuta | Lag. | Poaceae | 8 |
| Bouteloua parryi | (E.Fourn.) Griffiths | Poaceae | 8 |
| Bouteloua polymorpha | (E.Fourn.) Columbus | Poaceae | 8 |
| Bouteloua repens | (Kunth) Scribn. & Merr. | Poaceae | 8 |
| Bouteloua scorpioides | Lag. | Poaceae | 8 |
| Bouteloua uniflora | Vasey | Poaceae | 8 |
| Bouvardia laevis | M.Martens & Galeotti | Rubiaceae | 8 |
| Bouvardia longiflora | (Cav.) Kunth | Rubiaceae | 8 |
| Bouvardia ternifolia | (Cav.) Schltdl. | Rubiaceae | 8 |
| Bouvardia viminalis | Schltdl. | Rubiaceae | 8 |
| Brahea dulcis | (Kunth) Mart. | Arecaceae | 8 |
| Brasenia schreberi | J.F.Gmel. | Cabombaceae | 8 |
| Brassia verrucosa | Bateman ex Lindl. | Orchidaceae | 8 |
| Brickellia eupatorioides | (L.) Shinners | Asteraceae | 8 |
| Brickellia pendula | A.Gray | Asteraceae | 8 |
| Brickellia veronicaefolia | (Kunth) A.Gray | Asteraceae | 8 |
| Bromus anomalus | Rupr. ex E.Fourn. | Poaceae | 8 |
| Bromus carinatus | Hook. & Arn. | Poaceae | 8 |
| Brosimum alicastrum | Sw. | Moraceae | 8 |
| Browallia americana | L. | Solanaceae | 8 |
| Buchnera pusilla | Kunth | Orobanchaceae | 8 |
| Buddleja americana | L. | Scrophulariaceae | 8 |
| Buddleja cordata | Kunth | Scrophulariaceae | 8 |
| Buddleja crotonoides | A.Gray | Scrophulariaceae | 8 |
| Buddleja scordioides | Kunth | Scrophulariaceae | 8 |
| Buddleja sessiliflora | Kunth | Scrophulariaceae | 8 |
| Bulbostylis capillaris | (L.) Kunth ex C.B.Clarke | Cyperaceae | 8 |
| Bunchosia montana | A.Juss. | Malpighiaceae | 8 |
| Bunchosia palmeri | S.Watson | Malpighiaceae | 8 |
| Bursera ariensis | (Kunth) McVaugh & Rzed. | Burseraceae | 8 |
| Bursera bipinnata | (Moc. & Sessé ex DC.) Engl. | Burseraceae | 8 |
| Bursera copallifera | (Moc. & Sessé ex DC.) Bullock | Burseraceae | 8 |
| Bursera cuneata | (Schltdl.) Engl. | Burseraceae | 8 |
| Bursera excelsa | (Kunth) Engl. | Burseraceae | 8 |
| Bursera fagaroides | (Kunth) Engl. | Burseraceae | 8 |
| Bursera galeottiana | Engl. | Burseraceae | 8 |
| Bursera grandifolia | (Schltdl.) Engl. | Burseraceae | 8 |
| Bursera graveolens | (Kunth) Triana & Planch. | Burseraceae | 8 |
| Bursera kerberi | Engl. | Burseraceae | 8 |
| Bursera lancifolia | (Schltdl.) Engl. | Burseraceae | 8 |
| Bursera morelensis | Ramírez | Burseraceae | 8 |
| Bursera penicillata | (Sessé & Moc. ex DC.) Engl. | Burseraceae | 8 |
| Bursera simaruba | (L.) Sarg. | Burseraceae | 8 |
| Byrsonima crassifolia | (L.) Kunth | Malpighiaceae | 8 |
| Calandrinia acaulis | Kunth | Montiaceae | 8 |
| Calandrinia ciliata | (Ruiz & Pav.) DC. | Montiaceae | 8 |
| Calanthe calanthoides | (A.Rich. & Galeotti) Hamer & Garay | Orchidaceae | 8 |
| Calathea crotalifera | S.Watson | Marantaceae | 8 |
| Calceolaria mexicana | Benth. | Calceolariaceae | 8 |
| Calceolaria tripartita | Ruiz & Pav. | Calceolariaceae | 8 |
| Calea ternifolia | Kunth | Asteraceae | 8 |
| Calea urticifolia | (Mill.) DC. | Asteraceae | 8 |
| Callaeum macropterum | (DC.) D.M.Johnson | Malpighiaceae | 8 |
| Calliandra eriophylla | Benth. | Fabaceae | 8 |
| Calliandra hirsuta | (G.Don) Benth. | Fabaceae | 8 |
| Calliandra houstoniana | (Mill.) Standl. | Fabaceae | 8 |
| Calliandra humilis | Benth. | Fabaceae | 8 |
| Callianthe purpusii | (Standl.) Donnell | Malvaceae | 8 |
| Callisia fragrans | (Lindl.) Woodson | Commelinaceae | 8 |
| Callisia navicularis | (Ortgies) D.R.Hunt | Commelinaceae | 8 |
| Callisia repens | (Jacq.) L. | Commelinaceae | 8 |
| Callitriche heterophylla | Pursh | Plantaginaceae | 8 |
| Callitriche terrestris | Raf. | Plantaginaceae | 8 |
| Calochortus barbatus | (Kunth) Painter | Liliaceae | 8 |
| Calochortus purpureus | (Kunth) Baker | Liliaceae | 8 |
| Calophyllum brasiliense | Cambess. | Calophyllaceae | 8 |
| Calopogonium caeruleum | (Benth.) C.Wright | Fabaceae | 8 |
| Calopogonium mucunoides | Desv. | Fabaceae | 8 |
| Calycophyllum candidissimum | (Vahl) DC. | Rubiaceae | 8 |
| Calyptocarpus vialis | Less. | Asteraceae | 8 |
| Camonea umbellata | (L.) A.R.Simões & Staples | Convolvulaceae | 8 |
| Campyloneurum angustifolium | (Sw.) Fée | Polypodiaceae | 8 |
| Campyloneurum phyllitidis | (L.) C.Presl | Polypodiaceae | 8 |
| Canavalia oxyphylla | Standl. & L.O.Williams | Fabaceae | 8 |
| Canavalia rosea | (Sw.) DC. | Fabaceae | 8 |
| Canavalia septentrionalis | J.D.Sauer | Fabaceae | 8 |
| Canavalia villosa | Benth. | Fabaceae | 8 |
| Canna indica | L. | Cannaceae | 8 |
| Canna tuerckheimii | Kraenzl. | Cannaceae | 8 |
| Cantinoa mutabilis | (Rich.) Harley & J.F.B.Pastore | Lamiaceae | 8 |
| Caperonia castaneifolia | (L.) A.St.-Hil. | Euphorbiaceae | 8 |
| Capraria biflora | L. | Scrophulariaceae | 8 |
| Capraria frutescens | (Mill.) Briq. | Scrophulariaceae | 8 |
| Capsicum annuum | L. | Solanaceae | 8 |
| Cardamine fulcrata | Greene | Brassicaceae | 8 |
| Cardiospermum corindum | L. | Sapindaceae | 8 |
| Cardiospermum grandiflorum | Sw. | Sapindaceae | 8 |
| Cardiospermum halicacabum | L. | Sapindaceae | 8 |
| Carex albicans | Willd. ex Spreng. | Cyperaceae | 8 |
| Carex brachycalama | Griseb. | Cyperaceae | 8 |
| Carex comosa | Boott | Cyperaceae | 8 |
| Carex densa | (L.H.Bailey) L.H.Bailey | Cyperaceae | 8 |
| Carex eburnea | Boott | Cyperaceae | 8 |
| Carex echinata | Murray | Cyperaceae | 8 |
| Carex hamata | Sw. | Cyperaceae | 8 |
| Carex hystericina | Muhl. ex Willd. | Cyperaceae | 8 |
| Carex longii | Mack. | Cyperaceae | 8 |
| Carex microptera | Mack. | Cyperaceae | 8 |
| Carex muehlenbergii | Schkuhr ex Willd. | Cyperaceae | 8 |
| Carex nigromarginata | Schwein. | Cyperaceae | 8 |
| Carex phleoides | Cav. | Cyperaceae | 8 |
| Carex planostachys | Kunze | Cyperaceae | 8 |
| Carex polystachya | Sw. ex Wahlenb. | Cyperaceae | 8 |
| Carex praegracilis | W.Boott | Cyperaceae | 8 |
| Carex spissa | L.H.Bailey ex Hemsl. | Cyperaceae | 8 |
| Carex vallicola | Dewey | Cyperaceae | 8 |
| Carlowrightia arizonica | A.Gray | Acanthaceae | 8 |
| Carlowrightia neesiana | (Schauer) T.F.Daniel | Acanthaceae | 8 |
| Carminatia tenuiflora | DC. | Asteraceae | 8 |
| Carpinus tropicalis | (Donn.Sm.) Lundell | Betulaceae | 8 |
| Carya illinoinensis | (Wangenh.) K.Koch | Juglandaceae | 8 |
| Carya ovata | (Mill.) K.Koch | Juglandaceae | 8 |
| Cascabela gaumeri | (Hemsl.) Lippold | Apocynaceae | 8 |
| Cascabela ovata | (Cav.) Lippold | Apocynaceae | 8 |
| Cascabela thevetia | (L.) Lippold | Apocynaceae | 8 |
| Cascabela thevetioides | (Humb. & Bonpl.) Lippold | Apocynaceae | 8 |
| Casearia arguta | Kunth | Salicaceae | 8 |
| Casearia corymbosa | Kunth | Salicaceae | 8 |
| Casearia laetioides | (A.Rich.) Warb. | Salicaceae | 8 |
| Casearia sylvestris | Sw. | Salicaceae | 8 |
| Casearia tremula | (Griseb.) Griseb. ex C.Wright | Salicaceae | 8 |
| Casimiroa edulis | La Llave | Rutaceae | 8 |
| Cassia grandis | L.f. | Fabaceae | 8 |
| Castela erecta | Turpin | Simaroubaceae | 8 |
| Castela tortuosa | Liebm. | Simaroubaceae | 8 |
| Castilla elastica | Cerv. | Moraceae | 8 |
| Castilleja arvensis | Schltdl. & Cham. | Orobanchaceae | 8 |
| Castilleja integrifolia | L.f. | Orobanchaceae | 8 |
| Castilleja moranensis | Kunth | Orobanchaceae | 8 |
| Castilleja scorzonerifolia | Kunth | Orobanchaceae | 8 |
| Castilleja tenuiflora | Benth. | Orobanchaceae | 8 |
| Castilleja tenuifolia | M.Martens & Galeotti | Orobanchaceae | 8 |
| Catasetum integerrimum | Hook. | Orchidaceae | 8 |
| Catopsis nutans | (Sw.) Griseb. | Bromeliaceae | 8 |
| Catopsis paniculata | É.Morren | Bromeliaceae | 8 |
| Catopsis sessiliflora | (Ruiz & Pav.) Mez | Bromeliaceae | 8 |
| Cayaponia attenuata | (Hook. & Arn.) Cogn. | Cucurbitaceae | 8 |
| Ceanothus buxifolius | Willd. ex Schult. | Rhamnaceae | 8 |
| Ceanothus caeruleus | Lag. | Rhamnaceae | 8 |
| Ceanothus pauciflorus | DC. | Rhamnaceae | 8 |
| Cecropia angustifolia | Trécul | Urticaceae | 8 |
| Cecropia obtusifolia | Bertol. | Urticaceae | 8 |
| Cecropia peltata | L. | Urticaceae | 8 |
| Cedrela odorata | L. | Meliaceae | 8 |
| Cedrela salvadorensis | Standl. | Meliaceae | 8 |
| Ceiba pentandra | (L.) Gaertn. | Malvaceae | 8 |
| Celtis caudata | Planch. | Cannabaceae | 8 |
| Celtis iguanaea | (Jacq.) Sarg. | Cannabaceae | 8 |
| Celtis pallida | Torr. | Cannabaceae | 8 |
| Celtis reticulata | Torr. | Cannabaceae | 8 |
| Cenchrus echinatus | L. | Poaceae | 8 |
| Cenchrus latifolius | (Spreng.) Morrone | Poaceae | 8 |
| Cenchrus spinifex | Cav. | Poaceae | 8 |
| Centradenia grandifolia | (Schltdl.) Endl. | Melastomataceae | 8 |
| Centropogon grandidentatus | (Schltdl.) Zahlbr. | Campanulaceae | 8 |
| Centrosema macrocarpum | Benth. | Fabaceae | 8 |
| Centrosema plumieri | (Turpin ex Pers.) Benth. | Fabaceae | 8 |
| Centrosema pubescens | Benth. | Fabaceae | 8 |
| Centrosema virginianum | (L.) Benth. | Fabaceae | 8 |
| Cephalanthus occidentalis | L. | Rubiaceae | 8 |
| Cephalocereus columna-trajani | (Karw. ex Pfeiff.) K.Schum. | Cactaceae | 8 |
| Cephalocereus mezcalaensis | Bravo | Cactaceae | 8 |
| Cephalocereus tetetzo | (F.A.C.Weber ex J.M.Coult.) Diguet | Cactaceae | 8 |
| Cerastium brachypodum | (Engelm. ex A.Gray) B.L.Rob. | Caryophyllaceae | 8 |
| Cerastium nutans | Raf. | Caryophyllaceae | 8 |
| Ceratophyllum demersum | L. | Ceratophyllaceae | 8 |
| Cercis canadensis | L. | Fabaceae | 8 |
| Cercocarpus macrophyllus | C.K.Schneid. | Rosaceae | 8 |
| Cestrum aurantiacum | Lindl. | Solanaceae | 8 |
| Cestrum elegans | (Brongn. ex Neumann) Schltdl. | Solanaceae | 8 |
| Cestrum fasciculatum | (Schltdl.) Miers | Solanaceae | 8 |
| Cestrum nocturnum | L. | Solanaceae | 8 |
| Cestrum tomentosum | L.f. | Solanaceae | 8 |
| Chaetogastra longifolia | (Vahl) DC. | Melastomataceae | 8 |
| Chaetogastra naudiniana | Decne. | Melastomataceae | 8 |
| Chaetopappa ericoides | (Torr.) G.L.Nesom | Asteraceae | 8 |
| Chamaecrista flexuosa | (L.) Greene | Fabaceae | 8 |
| Chamaecrista greggii | (A.Gray) Pollard ex A.Heller | Fabaceae | 8 |
| Chamaecrista nictitans | (L.) Moench | Fabaceae | 8 |
| Chamaecrista rotundifolia | (Pers.) Greene | Fabaceae | 8 |
| Chamaedorea pinnatifrons | (Jacq.) Oerst. | Arecaceae | 8 |
| Chamissoa altissima | Kunth | Amaranthaceae | 8 |
| Chaptalia nutans | (L.) Pol. | Asteraceae | 8 |
| Chaptalia texana | Greene | Asteraceae | 8 |
| Chascolytrum subaristatum | (Lam.) Desv. | Poaceae | 8 |
| Chenopodium berlandieri | Moq. | Chenopodiaceae | 8 |
| Chimaphila maculata | (L.) Pursh | Ericaceae | 8 |
| Chimaphila umbellata | (L.) W.P.C.Barton | Ericaceae | 8 |
| Chiococca alba | (L.) Hitchc. | Rubiaceae | 8 |
| Chiococca pachyphylla | Wernham | Rubiaceae | 8 |
| Chiranthodendron pentadactylon | Larreat. | Malvaceae | 8 |
| Chloracantha spinosa | (Benth.) G.L.Nesom | Asteraceae | 8 |
| Chloris virgata | Sw. | Poaceae | 8 |
| Choisya ternata | Kunth | Rutaceae | 8 |
| Chromolaena collina | (DC.) R.M.King & H.Rob. | Asteraceae | 8 |
| Chromolaena odorata | (L.) R.M.King & H.Rob. | Asteraceae | 8 |
| Chromolaena pulchella | (Kunth) R.M.King & H.Rob. | Asteraceae | 8 |
| Chrysactinia mexicana | A.Gray | Asteraceae | 8 |
| Chrysobalanus icaco | L. | Chrysobalanaceae | 8 |
| Chrysophyllum mexicanum | Brandegee ex Standl. | Sapotaceae | 8 |
| Cipura campanulata | Ravenna | Iridaceae | 8 |
| Cirsium ehrenbergii | Sch.Bip. | Asteraceae | 8 |
| Cirsium horridulum | Michx. | Asteraceae | 8 |
| Cirsium mexicanum | DC. | Asteraceae | 8 |
| Cirsium nivale | Sch.Bip. | Asteraceae | 8 |
| Cirsium pinetorum | Greenm. | Asteraceae | 8 |
| Cirsium rhaphilepis | Petr. | Asteraceae | 8 |
| Cirsium subcoriaceum | Sch.Bip. | Asteraceae | 8 |
| Cissampelos pareira | L. | Menispermaceae | 8 |
| Cissus alata | Jacq. | Vitaceae | 8 |
| Cissus biformifolia | Standl. | Vitaceae | 8 |
| Cissus erosa | Rich. | Vitaceae | 8 |
| Cissus microcarpa | Vahl | Vitaceae | 8 |
| Cissus tiliacea | Kunth | Vitaceae | 8 |
| Cissus trifoliata | (L.) L. | Vitaceae | 8 |
| Cissus verticillata | (L.) Nicolson & C.E.Jarvis | Vitaceae | 8 |
| Citharexylum berlandieri | B.L.Rob. | Verbenaceae | 8 |
| Cladocolea loniceroides | (Tiegh.) Kuijt | Loranthaceae | 8 |
| Claytonia perfoliata | Donn ex Willd. | Montiaceae | 8 |
| Clematis dioica | L. | Ranunculaceae | 8 |
| Clematis drummondii | Torr. & A.Gray | Ranunculaceae | 8 |
| Cleome uniglandulosa | Cav. | Cleomaceae | 8 |
| Cleomella multicaulis | (DC.) J.C.Hall & Roalson | Cleomaceae | 8 |
| Clethra mexicana | DC. | Clethraceae | 8 |
| Clethra rosei | Britton | Clethraceae | 8 |
| Cleyera theoides | (Sw.) Choisy | Pentaphylacaceae | 8 |
| Clinopodium brownei | (Sw.) Kuntze | Lamiaceae | 8 |
| Clinopodium macrostemum | (Moc. & Sessé ex Benth.) Kuntze | Lamiaceae | 8 |
| Clinopodium mexicanum | (Benth.) Govaerts | Lamiaceae | 8 |
| Clusia guatemalensis | Hemsl. | Clusiaceae | 8 |
| Clusia minor | L. | Clusiaceae | 8 |
| Clusia salvinii | Donn.Sm. | Clusiaceae | 8 |
| Cnidoscolus aconitifolius | (Mill.) I.M.Johnst. | Euphorbiaceae | 8 |
| Cnidoscolus angustidens | Torr. | Euphorbiaceae | 8 |
| Cnidoscolus multilobus | (Pax) I.M.Johnst. | Euphorbiaceae | 8 |
| Cnidoscolus tehuacanensis | Breckon | Euphorbiaceae | 8 |
| Cnidoscolus urens | (L.) Arthur | Euphorbiaceae | 8 |
| Cobaea scandens | Cav. | Polemoniaceae | 8 |
| Coccocypselum hirsutum | Bartl. ex DC. | Rubiaceae | 8 |
| Coccoloba acapulcensis | Standl. | Polygonaceae | 8 |
| Cochlidium serrulatum | (Sw.) L.E.Bishop | Polypodiaceae | 8 |
| Cochlospermum vitifolium | (Willd.) Spreng. | Bixaceae | 8 |
| Cojoba arborea | (L.) Britton & Rose | Fabaceae | 8 |
| Colobanthus quitensis | (Kunth) Bartl. | Caryophyllaceae | 8 |
| Cologania angustifolia | Kunth | Fabaceae | 8 |
| Cologania biloba | (Lindl.) G.Nicholson | Fabaceae | 8 |
| Cologania broussonetii | (Balb.) DC. | Fabaceae | 8 |
| Cologania obovata | Schltdl. | Fabaceae | 8 |
| Cologania procumbens | Kunth | Fabaceae | 8 |
| Colubrina greggii | S.Watson | Rhamnaceae | 8 |
| Colubrina triflora | Brongn. | Rhamnaceae | 8 |
| Columnea schiedeana | Schltdl. | Gesneriaceae | 8 |
| Comarostaphylis discolor | (Hook.) Diggs | Ericaceae | 8 |
| Comarostaphylis glaucescens | (Kunth) Zucc. ex Klotzsch | Ericaceae | 8 |
| Comarostaphylis polifolia | (Kunth) Zucc. ex Klotzsch | Ericaceae | 8 |
| Combretum farinosum | Kunth | Combretaceae | 8 |
| Combretum fruticosum | (Loefl.) Stuntz | Combretaceae | 8 |
| Combretum laxum | Jacq. | Combretaceae | 8 |
| Commelina dianthifolia | Redouté | Commelinaceae | 8 |
| Commelina erecta | L. | Commelinaceae | 8 |
| Commelina obliqua | Vahl | Commelinaceae | 8 |
| Commelina tuberosa | L. | Commelinaceae | 8 |
| Comocladia macrophylla | (Hook. & Arn.) L.Riley | Anacardiaceae | 8 |
| Comparettia falcata | Poepp. & Endl. | Orchidaceae | 8 |
| Condalia velutina | I.M.Johnst. | Rhamnaceae | 8 |
| Condea tomentosa | (Poit.) Harley & J.F.B.Pastore | Lamiaceae | 8 |
| Condea verticillata | (Jacq.) Harley & J.F.B.Pastore | Lamiaceae | 8 |
| Conocarpus erectus | L. | Combretaceae | 8 |
| Conoclinium betonicifolium | (Mill.) R.M.King & H.Rob. | Asteraceae | 8 |
| Conopholis alpina | Liebm. | Orobanchaceae | 8 |
| Convolvulus crenatifolius | Ruiz & Pav. | Convolvulaceae | 8 |
| Convolvulus equitans | Benth. | Convolvulaceae | 8 |
| Conyza laevigata | (Rich.) Pruski | Asteraceae | 8 |
| Conzattia multiflora | (B.L.Rob.) Standl. | Fabaceae | 8 |
| Corallorhiza maculata | Raf. | Orchidaceae | 8 |
| Corallorhiza odontorhiza | (Willd.) Nutt. | Orchidaceae | 8 |
| Corallorhiza striata | Lindl. | Orchidaceae | 8 |
| Corallorhiza wisteriana | Conrad | Orchidaceae | 8 |
| Corchorus siliquosus | L. | Malvaceae | 8 |
| Cordia alliodora | (Ruiz & Pav.) Oken | Cordiaceae | 8 |
| Cordia dentata | Poir. | Cordiaceae | 8 |
| Cordia dodecandra | DC. | Cordiaceae | 8 |
| Cordia elaeagnoides | A.DC. | Cordiaceae | 8 |
| Cordia gerascanthus | L. | Cordiaceae | 8 |
| Coriaria ruscifolia | L. | Coriariaceae | 8 |
| Cornus disciflora | Moc. & Sessé ex DC. | Cornaceae | 8 |
| Cornus excelsa | Kunth | Cornaceae | 8 |
| Coryphantha pallida | Britton & Rose | Cactaceae | 8 |
| Coryphantha retusa | (Pfeiff.) Britton & Rose | Cactaceae | 8 |
| Cosmos bipinnatus | Cav. | Asteraceae | 8 |
| Cosmos caudatus | Kunth | Asteraceae | 8 |
| Cosmos crithmifolius | Kunth | Asteraceae | 8 |
| Cosmos diversifolius | Otto | Asteraceae | 8 |
| Cosmos scabiosoides | Kunth | Asteraceae | 8 |
| Cosmos sulphureus | Cav. | Asteraceae | 8 |
| Costus pictus | D.Don | Costaceae | 8 |
| Costus pulverulentus | C.Presl | Costaceae | 8 |
| Costus scaber | Ruiz & Pav. | Costaceae | 8 |
| Cottea pappophoroides | Kunth | Poaceae | 8 |
| Cotula mexicana | (DC.) Cabrera | Asteraceae | 8 |
| Couepia polyandra | (Kunth) Rose | Chrysobalanaceae | 8 |
| Coulteria platyloba | (S.Watson) N.Zamora | Fabaceae | 8 |
| Coursetia caribaea | (Jacq.) Lavin | Fabaceae | 8 |
| Coursetia glandulosa | A.Gray | Fabaceae | 8 |
| Cranichis cochleata | Dressler | Orchidaceae | 8 |
| Crassula connata | A.Berger | Crassulaceae | 8 |
| Crataegus mexicana | Moc. & Sessé ex DC. | Rosaceae | 8 |
| Crateva tapia | L. | Capparaceae | 8 |
| Crescentia alata | Kunth | Bignoniaceae | 8 |
| Crinum americanum | L. | Amaryllidaceae | 8 |
| Crinum erubescens | L.f. | Amaryllidaceae | 8 |
| Critonia hospitalis | (B.L.Rob.) R.M.King & H.Rob. | Asteraceae | 8 |
| Critonia morifolia | (Mill.) R.M.King & H.Rob. | Asteraceae | 8 |
| Critonia quadrangularis | (DC.) R.M.King & H.Rob. | Asteraceae | 8 |
| Crocanthemum glomeratum | (Lag.) Janch. | Cistaceae | 8 |
| Crotalaria cajanifolia | Kunth | Fabaceae | 8 |
| Crotalaria incana | L. | Fabaceae | 8 |
| Crotalaria micans | Link | Fabaceae | 8 |
| Crotalaria mollicula | Kunth | Fabaceae | 8 |
| Crotalaria pumila | Ortega | Fabaceae | 8 |
| Crotalaria rotundifolia | J.F.Gmel. | Fabaceae | 8 |
| Crotalaria sagittalis | L. | Fabaceae | 8 |
| Croton adspersus | Benth. | Euphorbiaceae | 8 |
| Croton ciliatoglandulifer | Ortega | Euphorbiaceae | 8 |
| Croton cortesianus | Kunth | Euphorbiaceae | 8 |
| Croton dioicus | Cav. | Euphorbiaceae | 8 |
| Croton draco | Schltdl. | Euphorbiaceae | 8 |
| Croton francoanus | Müll.Arg. | Euphorbiaceae | 8 |
| Croton glandulosus | L. | Euphorbiaceae | 8 |
| Croton heliotropiifolius | Kunth | Euphorbiaceae | 8 |
| Croton hirtus | L'Hér. | Euphorbiaceae | 8 |
| Croton reflexifolius | Kunth | Euphorbiaceae | 8 |
| Croton sonorae | Torr. | Euphorbiaceae | 8 |
| Crusea coccinea | DC. | Rubiaceae | 8 |
| Crusea hispida | (Mill.) B.L.Rob. | Rubiaceae | 8 |
| Crusea longiflora | (Roem. & Schult.) W.R.Anderson | Rubiaceae | 8 |
| Crusea simplex | (Willd.) J.H.Kirkbr. & Wiersema | Rubiaceae | 8 |
| Cucurbita foetidissima | Kunth | Cucurbitaceae | 8 |
| Cucurbita moschata | Duchesne | Cucurbitaceae | 8 |
| Cucurbita pepo | L. | Cucurbitaceae | 8 |
| Cupania dentata | Moc. & Sessé | Sapindaceae | 8 |
| Cupania glabra | Sw. | Sapindaceae | 8 |
| Cuphea aequipetala | Cav. | Lythraceae | 8 |
| Cuphea appendiculata | Benth. | Lythraceae | 8 |
| Cuphea avigera | B.L.Rob. & Seaton | Lythraceae | 8 |
| Cuphea carthagenensis | (Jacq.) J.F.Macbr. | Lythraceae | 8 |
| Cuphea hookeriana | Walp. | Lythraceae | 8 |
| Cuphea hyssopifolia | Kunth | Lythraceae | 8 |
| Cuphea jorullensis | Kunth | Lythraceae | 8 |
| Cuphea leptopoda | Hemsl. | Lythraceae | 8 |
| Cuphea llavea | Lex. | Lythraceae | 8 |
| Cuphea nitidula | Kunth | Lythraceae | 8 |
| Cuphea procumbens | Ortega | Lythraceae | 8 |
| Cuphea tolucana | Peyr. | Lythraceae | 8 |
| Cuphea wrightii | A.Gray | Lythraceae | 8 |
| Curatella americana | L. | Dilleniaceae | 8 |
| Cuscuta campestris | Yunck. | Convolvulaceae | 8 |
| Cuscuta umbellata | Kunth | Convolvulaceae | 8 |
| Cyathea costaricensis | (Kuhn) Domin | Cyatheaceae | 8 |
| Cyclanthera carthagenensis | (Jacq.) H.Schaef. & S.S.Renner | Cucurbitaceae | 8 |
| Cyclopogon cranichoides | (Griseb.) Schltr. | Orchidaceae | 8 |
| Cyclopogon elatus | (Sw.) Schltr. | Orchidaceae | 8 |
| Cyclospermum leptophyllum | (Pers.) Sprague | Apiaceae | 8 |
| Cylindropuntia imbricata | (Haw.) F.M.Knuth | Cactaceae | 8 |
| Cylindropuntia kleiniae | (DC.) F.M.Knuth | Cactaceae | 8 |
| Cylindropuntia leptocaulis | (DC.) F.M.Knuth | Cactaceae | 8 |
| Cylindropuntia pallida | (Rose) F.M.Knuth | Cactaceae | 8 |
| Cylindropuntia tunicata | (Lehm.) F.M.Knuth | Cactaceae | 8 |
| Cymbopetalum baillonii | R.E.Fr. | Annonaceae | 8 |
| Cyperus aggregatus | (Willd.) Endl. | Cyperaceae | 8 |
| Cyperus articulatus | L. | Cyperaceae | 8 |
| Cyperus brevifolius | (Rottb.) Hassk. | Cyperaceae | 8 |
| Cyperus cuspidatus | Kunth | Cyperaceae | 8 |
| Cyperus entrerianus | Boeckeler | Cyperaceae | 8 |
| Cyperus esculentus | L. | Cyperaceae | 8 |
| Cyperus fendlerianus | Boeckeler | Cyperaceae | 8 |
| Cyperus flavescens | L. | Cyperaceae | 8 |
| Cyperus hermaphroditus | (Jacq.) Standl. | Cyperaceae | 8 |
| Cyperus laevigatus | L. | Cyperaceae | 8 |
| Cyperus lanceolatus | Poir. | Cyperaceae | 8 |
| Cyperus manimae | Kunth | Cyperaceae | 8 |
| Cyperus melanostachyus | Kunth | Cyperaceae | 8 |
| Cyperus ochraceus | Vahl | Cyperaceae | 8 |
| Cyperus odoratus | L. | Cyperaceae | 8 |
| Cyperus prolixus | Kunth | Cyperaceae | 8 |
| Cyperus seslerioides | Kunth | Cyperaceae | 8 |
| Cyperus sesquiflorus | (Torr.) Mattf. & Kük. | Cyperaceae | 8 |
| Cyperus sphaerolepis | Boeckeler | Cyperaceae | 8 |
| Cyperus squarrosus | L. | Cyperaceae | 8 |
| Cyperus subsquarrosus | (Muhl.) Bauters | Cyperaceae | 8 |
| Cyperus surinamensis | Rottb. | Cyperaceae | 8 |
| Cyperus virens | Michx. | Cyperaceae | 8 |
| Cyphomeris gypsophiloides | (M.Martens & Galeotti) Standl. | Nyctaginaceae | 8 |
| Cyrtopodium macrobulbon | (Lex.) G.A.Romero & Carnevali | Orchidaceae | 8 |
| Cystopteris fragilis | (L.) Bernh. | Cystopteridaceae | 8 |
| Dahlia australis | (Sherff) P.D.Sørensen | Asteraceae | 8 |
| Dahlia coccinea | Cav. | Asteraceae | 8 |
| Dahlia imperialis | Roezl ex Ortgies | Asteraceae | 8 |
| Dahlia merckii | Lehm. | Asteraceae | 8 |
| Dahlia pinnata | Cav. | Asteraceae | 8 |
| Dahlia sorensenii | H.V.Hansen & Hjert. | Asteraceae | 8 |
| Dahlia tenuicaulis | P.D.Sørensen | Asteraceae | 8 |
| Dalea bicolor | Humb. & Bonpl. ex Willd. | Fabaceae | 8 |
| Dalea caeciliae | Harms | Fabaceae | 8 |
| Dalea dorycnioides | DC. | Fabaceae | 8 |
| Dalea foliolosa | (Aiton) Barneby | Fabaceae | 8 |
| Dalea greggii | A.Gray | Fabaceae | 8 |
| Dalea humilis | G.Don | Fabaceae | 8 |
| Dalea lasiathera | A.Gray | Fabaceae | 8 |
| Dalea leporina | (Aiton) Bullock | Fabaceae | 8 |
| Dalea leucosericea | (Rydb.) Standl. & Steyerm. | Fabaceae | 8 |
| Dalea lutea | (Cav.) Willd. | Fabaceae | 8 |
| Dalea obovatifolia | Ortega | Fabaceae | 8 |
| Dalea prostrata | Ortega | Fabaceae | 8 |
| Dalea sericea | Lag. | Fabaceae | 8 |
| Dalea urceolata | Greene | Fabaceae | 8 |
| Dalea versicolor | Zucc. | Fabaceae | 8 |
| Damburneya salicifolia | (Kunth) Trofimov & Rohwer | Lauraceae | 8 |
| Danthonia spicata | (L.) Roem. & Schult. | Poaceae | 8 |
| Daphnopsis americana | (Mill.) J.R.Johnst. | Thymelaeaceae | 8 |
| Dasylirion acrotrichum | (Schiede) Zucc. | Asparagaceae | 8 |
| Datura ceratocaula | Ortega | Solanaceae | 8 |
| Datura discolor | Bernh. | Solanaceae | 8 |
| Datura ferox | L. | Solanaceae | 8 |
| Datura innoxia | Mill. | Solanaceae | 8 |
| Datura metel | L. | Solanaceae | 8 |
| Datura quercifolia | Kunth | Solanaceae | 8 |
| Datura stramonium | L. | Solanaceae | 8 |
| Davilla kunthii | A.St.-Hil. | Dilleniaceae | 8 |
| Deiregyne eriophora | (B.L.Rob. & Greenm.) Garay | Orchidaceae | 8 |
| Delilia biflora | Kuntze | Asteraceae | 8 |
| Delphinium pedatisectum | Hemsl. | Ranunculaceae | 8 |
| Dermatophyllum secundiflorum | (Ortega) Gandhi & Reveal | Fabaceae | 8 |
| Deschampsia elongata | (Hook.) Munro | Poaceae | 8 |
| Desmanthus bicornutus | S.Watson | Fabaceae | 8 |
| Desmanthus virgatus | (L.) Willd. | Fabaceae | 8 |
| Desmodium batocaulon | A.Gray | Fabaceae | 8 |
| Desmodium grahamii | A.Gray | Fabaceae | 8 |
| Desmodium incanum | (Sw.) DC. | Fabaceae | 8 |
| Desmodium infractum | DC. | Fabaceae | 8 |
| Desmodium intortum | (Mill.) Urb. | Fabaceae | 8 |
| Desmodium macrostachyum | Hemsl. | Fabaceae | 8 |
| Desmodium molliculum | (Kunth) DC. | Fabaceae | 8 |
| Desmodium orbiculare | Schltdl. | Fabaceae | 8 |
| Desmodium pringlei | S.Watson | Fabaceae | 8 |
| Desmodium procumbens | (Mill.) C.L.Hitchc. | Fabaceae | 8 |
| Desmodium psilophyllum | Schltdl. | Fabaceae | 8 |
| Desmodium scorpiurus | (Sw.) Poir. | Fabaceae | 8 |
| Desmodium subsessile | Schltdl. | Fabaceae | 8 |
| Desmodium tortuosum | (Sw.) DC. | Fabaceae | 8 |
| Desmodium uncinatum | (Jacq.) DC. | Fabaceae | 8 |
| Dianthera breviflora | (Nees) Hemsl. | Acanthaceae | 8 |
| Dianthera candicans | (Nees) Benth. & Hook.f. ex Hemsl. | Acanthaceae | 8 |
| Dianthera comata | L. | Acanthaceae | 8 |
| Diastatea micrantha | (Kunth) McVaugh | Campanulaceae | 8 |
| Diastatea tenera | (A.Gray) McVaugh | Campanulaceae | 8 |
| Dichaea glauca | (Sw.) Lindl. | Orchidaceae | 8 |
| Dichaea muricatoides | Hamer & Garay | Orchidaceae | 8 |
| Dichaea neglecta | Schltr. | Orchidaceae | 8 |
| Dichanthelium acuminatum | (Sw.) Gould & C.A.Clark | Poaceae | 8 |
| Dichanthelium commutatum | (Schult.) Gould | Poaceae | 8 |
| Dichanthelium dichotomum | (L.) Gould | Poaceae | 8 |
| Dichanthelium laxiflorum | (Lam.) Gould | Poaceae | 8 |
| Dichanthelium lindheimeri | (Nash) Gould | Poaceae | 8 |
| Dichanthelium ovale | (Elliott) Gould & C.A.Clark | Poaceae | 8 |
| Dichanthelium sphaerocarpon | (Elliott) Gould | Poaceae | 8 |
| Dichondra argentea | Humb. & Bonpl. ex Willd. | Convolvulaceae | 8 |
| Dichondra brachypoda | Wooton & Standl. | Convolvulaceae | 8 |
| Dichondra sericea | Sw. | Convolvulaceae | 8 |
| Dichromanthus aurantiacus | (La Llave & Lex.) Salazar & Soto Arenas | Orchidaceae | 8 |
| Dichromanthus cinnabarinus | (La Llave & Lex.) Garay | Orchidaceae | 8 |
| Dichromanthus michuacanus | (La Llave & Lex.) Salazar & Soto Arenas | Orchidaceae | 8 |
| Dicliptera peduncularis | Nees | Acanthaceae | 8 |
| Dicliptera resupinata | (Vahl) Juss. | Acanthaceae | 8 |
| Dicliptera sexangularis | (L.) Juss. | Acanthaceae | 8 |
| Dictyanthus pavonii | Decne. | Apocynaceae | 8 |
| Dictyanthus reticulatus | (Turcz.) Benth. & Hook.f. ex Hemsl. | Apocynaceae | 8 |
| Digitacalia jatrophoides | (Kunth) Pippen | Asteraceae | 8 |
| Digitaria californica | (Benth.) Henrard | Poaceae | 8 |
| Digitaria filiformis | (L.) Koeler | Poaceae | 8 |
| Digitaria insularis | (L.) Mez ex Ekman | Poaceae | 8 |
| Dinema polybulbon | (Sw.) Lindl. | Orchidaceae | 8 |
| Diodia virginiana | L. | Rubiaceae | 8 |
| Dioon purpusii | Rose | Zamiaceae | 8 |
| Dioscorea densiflora | Hemsl. | Dioscoreaceae | 8 |
| Dioscorea floribunda | M.Martens & Galeotti | Dioscoreaceae | 8 |
| Dioscorea galeottiana | Kunth | Dioscoreaceae | 8 |
| Dioscorea mexicana | Scheidw. | Dioscoreaceae | 8 |
| Diospyros acapulcensis | Kunth | Ebenaceae | 8 |
| Diospyros nigra | (J.F.Gmel.) Perr. & Perr. | Ebenaceae | 8 |
| Diphasiastrum thyoides | (Willd.) Holub | Lycopodiaceae | 8 |
| Diphysa americana | (Mill.) M.Sousa | Fabaceae | 8 |
| Diphysa suberosa | S.Watson | Fabaceae | 8 |
| Diplachne fusca | (L.) P.Beauv. | Poaceae | 8 |
| Disakisperma dubium | (Kunth) P.M.Peterson & N.Snow | Poaceae | 8 |
| Disocactus anguliger | (Lem.) M.A.Cruz & S.Arias | Cactaceae | 8 |
| Disocactus crenatus | (Lindl.) M.A.Cruz & S.Arias | Cactaceae | 8 |
| Distichlis spicata | (L.) Greene | Poaceae | 8 |
| Distimake cissoides | (Lam.) A.R.Simões & Staples | Convolvulaceae | 8 |
| Distimake dissectus | (Jacq.) A.R.Simões & Staples | Convolvulaceae | 8 |
| Distimake platyphyllus | (Fernald) Petrongari & A.R.Simões | Convolvulaceae | 8 |
| Distimake quinquefolius | (L.) A.R.Simões & Staples | Convolvulaceae | 8 |
| Ditaxis serrata | (Torr.) A.Heller | Euphorbiaceae | 8 |
| Dodonaea viscosa | Jacq. | Sapindaceae | 8 |
| Dolichandra quadrivalvis | (Jacq.) L.G.Lohmann | Bignoniaceae | 8 |
| Dolichandra unguis-cati | (L.) L.G.Lohmann | Bignoniaceae | 8 |
| Dorstenia contrajerva | L. | Moraceae | 8 |
| Dorstenia drakena | L. | Moraceae | 8 |
| Drimys granadensis | L.f. | Winteraceae | 8 |
| Drymaria glandulosa | Bartl. | Caryophyllaceae | 8 |
| Drymaria leptophylla | (Cham. & Schltdl.) Fenzl ex Rohrb. | Caryophyllaceae | 8 |
| Drymaria molluginea | (Ser.) Didr. | Caryophyllaceae | 8 |
| Drymaria villosa | Cham. & Schltdl. | Caryophyllaceae | 8 |
| Dryopteris wallichiana | (Spreng.) Hyl. | Dryopteridaceae | 8 |
| Drypetes lateriflora | (Sw.) Krug & Urb. | Putranjivaceae | 8 |
| Dugesia mexicana | A.Gray | Asteraceae | 8 |
| Duranta erecta | L. | Verbenaceae | 8 |
| Dyschoriste capitata | (Oerst.) Kuntze | Acanthaceae | 8 |
| Dyschoriste decumbens | (A.Gray) Kuntze | Acanthaceae | 8 |
| Dyschoriste hirsutissima | (Nees) Kuntze | Acanthaceae | 8 |
| Dyschoriste microphylla | (Cav.) Kuntze | Acanthaceae | 8 |
| Dyschoriste schiedeana | (Nees) Kuntze | Acanthaceae | 8 |
| Dysphania ambrosioides | (L.) Mosyakin & Clemants | Chenopodiaceae | 8 |
| Dyssodia papposa | (Vent.) Hitchc. | Asteraceae | 8 |
| Dyssodia tagetiflora | Lag. | Asteraceae | 8 |
| Echeandia flavescens | (Schult. & Schult.f.) Cruden | Asparagaceae | 8 |
| Echeandia longipedicellata | Cruden | Asparagaceae | 8 |
| Echeandia mexicana | Cruden | Asparagaceae | 8 |
| Echeandia nana | (Baker) Cruden | Asparagaceae | 8 |
| Echeandia parviflora | Baker | Asparagaceae | 8 |
| Echeandia vestita | (Baker) Cruden | Asparagaceae | 8 |
| Echeveria fulgens | Lem. | Crassulaceae | 8 |
| Echeveria gibbiflora | DC. | Crassulaceae | 8 |
| Echeveria gigantea | Rose & J.A.Purpus | Crassulaceae | 8 |
| Echeveria goldmanii | Rose | Crassulaceae | 8 |
| Echeveria mucronata | Schltdl. | Crassulaceae | 8 |
| Echeveria nodulosa | (Baker) Ed.Otto | Crassulaceae | 8 |
| Echeveria rosea | Lindl. | Crassulaceae | 8 |
| Echeveria secunda | Booth ex Lindl. | Crassulaceae | 8 |
| Echeveria subrigida | Rose | Crassulaceae | 8 |
| Echinocactus platyacanthus | Link & Otto | Cactaceae | 8 |
| Echinopepon wrightii | (A.Gray) S.Watson | Cucurbitaceae | 8 |
| Echites panduratus | A.DC. | Apocynaceae | 8 |
| Eclipta prostrata | (L.) L. | Asteraceae | 8 |
| Ehretia latifolia | Loisel. | Ehretiaceae | 8 |
| Ehretia tinifolia | L. | Ehretiaceae | 8 |
| Elaphoglossum paleaceum | (Hook. & Grev.) Sledge | Dryopteridaceae | 8 |
| Elaphoglossum peltatum | (Sw.) Urb. | Dryopteridaceae | 8 |
| Elatine brachysperma | A.Gray | Elatinaceae | 8 |
| Electranthera mutica | (DC.) Mesfin, D.J.Crawford & Pruski | Asteraceae | 8 |
| Eleocharis acicularis | (L.) Roem. & Schult. | Cyperaceae | 8 |
| Eleocharis elegans | (Kunth) Roem. & Schult. | Cyperaceae | 8 |
| Eleocharis geniculata | (L.) Roem. & Schult. | Cyperaceae | 8 |
| Eleocharis macrostachya | Britton | Cyperaceae | 8 |
| Eleocharis montana | (Kunth) Roem. & Schult. | Cyperaceae | 8 |
| Eleocharis montevidensis | Kunth | Cyperaceae | 8 |
| Eleocharis rostellata | (Torr.) Torr. | Cyperaceae | 8 |
| Elephantopus mollis | Kunth | Asteraceae | 8 |
| Elleanthus capitatus | (Poepp. & Endl.) Rchb.f. | Orchidaceae | 8 |
| Elymus violaceus | (Hornem.) J.Feilberg | Poaceae | 8 |
| Elytraria bromoides | Oerst. | Acanthaceae | 8 |
| Elytraria imbricata | (Vahl) Pers. | Acanthaceae | 8 |
| Encyclia parviflora | (Regel) Withner | Orchidaceae | 8 |
| Enneapogon desvauxii | P.Beauv. | Poaceae | 8 |
| Entada gigas | (L.) Fawc. & Rendle | Fabaceae | 8 |
| Enterolobium cyclocarpum | (Jacq.) Griseb. | Fabaceae | 8 |
| Ephedra compacta | Rose | Ephedraceae | 8 |
| Epidendrum cardiophorum | Schltr. | Orchidaceae | 8 |
| Epidendrum ciliare | L. | Orchidaceae | 8 |
| Epidendrum conopseum | R.Br. | Orchidaceae | 8 |
| Epidendrum radicans | Pav. ex Lindl. | Orchidaceae | 8 |
| Epidendrum ramosum | Jacq. | Orchidaceae | 8 |
| Epilobium brachycarpum | C.Presl | Onagraceae | 8 |
| Epilobium ciliatum | Raf. | Onagraceae | 8 |
| Epilobium denticulatum | Ruiz & Pav. | Onagraceae | 8 |
| Epiphyllum oxypetalum | (DC.) Haw. | Cactaceae | 8 |
| Epiphyllum phyllanthus | (L.) Haw. | Cactaceae | 8 |
| Equisetum hyemale | L. | Equisetaceae | 8 |
| Equisetum laevigatum | A.Braun | Equisetaceae | 8 |
| Equisetum myriochaetum | Schltdl. & Cham. | Equisetaceae | 8 |
| Eragrostis intermedia | Hitchc. | Poaceae | 8 |
| Eragrostis pectinacea | (Michx.) Nees | Poaceae | 8 |
| Erblichia odorata | Seem. | Passifloraceae | 8 |
| Erechtites hieraciifolius | (L.) Raf. ex DC. | Asteraceae | 8 |
| Eremosis leiocarpa | (DC.) Gleason | Asteraceae | 8 |
| Eremosis triflosculosa | (Kunth) Gleason | Asteraceae | 8 |
| Erigeron bonariensis | L. | Asteraceae | 8 |
| Erigeron canadensis | L. | Asteraceae | 8 |
| Erigeron floribundus | (Kunth) Sch.Bip. | Asteraceae | 8 |
| Erigeron galeottii | (A.Gray ex Hemsl.) Greene | Asteraceae | 8 |
| Erigeron karvinskianus | DC. | Asteraceae | 8 |
| Erigeron longipes | DC. | Asteraceae | 8 |
| Erigeron primulifolium | Juss. ex Cass. | Asteraceae | 8 |
| Erigeron pubescens | Kunth | Asteraceae | 8 |
| Erigeron variifolius | S.F.Blake | Asteraceae | 8 |
| Eriogonum jamesii | Benth. | Polygonaceae | 8 |
| Erioneuron avenaceum | (Kunth) Tateoka | Poaceae | 8 |
| Erioneuron pilosum | (Buckley) Nash | Poaceae | 8 |
| Eryngium carlinae | F.Delaroche | Apiaceae | 8 |
| Eryngium foetidum | L. | Apiaceae | 8 |
| Eryngium heterophyllum | Engelm. | Apiaceae | 8 |
| Eryngium proteiflorum | F.Delaroche | Apiaceae | 8 |
| Eryngium scaposum | Turcz. | Apiaceae | 8 |
| Erysimum asperum | (Nutt.) DC. | Brassicaceae | 8 |
| Erythranthe geyeri | (Torr.) G.L.Nesom | Phrymaceae | 8 |
| Erythranthe glabrata | (Kunth) G.L.Nesom | Phrymaceae | 8 |
| Erythrina americana | Mill. | Fabaceae | 8 |
| Erythrina breviflora | Moc. & Sessé ex DC. | Fabaceae | 8 |
| Erythrina flabelliformis | Kearney | Fabaceae | 8 |
| Erythrina lanata | Rose | Fabaceae | 8 |
| Erythrina nigrorosea | (Krukoff & Barneby) G.L.Nesom | Fabaceae | 8 |
| Erythroxylum havanense | Jacq. | Erythroxylaceae | 8 |
| Erythroxylum mexicanum | Kunth | Erythroxylaceae | 8 |
| Erythroxylum rotundifolium | Lunan | Erythroxylaceae | 8 |
| Escobedia grandiflora | (L.f.) Kuntze | Orobanchaceae | 8 |
| Eucnide hirta | (Pav. ex G.Don) H.J.Thomps. & W.R.Ernst | Loasaceae | 8 |
| Eucnide lobata | (Hook.) A.Gray | Loasaceae | 8 |
| Eugenia acapulcensis | Steud. | Myrtaceae | 8 |
| Eugenia capuli | (Schltdl. & Cham.) Hook. & Arn. | Myrtaceae | 8 |
| Eugenia capulioides | Lundell | Myrtaceae | 8 |
| Eugenia choapamensis | Standl. | Myrtaceae | 8 |
| Eulophia alta | (L.) Fawc. & Rendle | Orchidaceae | 8 |
| Eumachia microdon | (DC.) Delprete & J.H.Kirkbr. | Rubiaceae | 8 |
| Euphorbia antisyphilitica | Zucc. | Euphorbiaceae | 8 |
| Euphorbia anychioides | Boiss. | Euphorbiaceae | 8 |
| Euphorbia ariensis | Kunth | Euphorbiaceae | 8 |
| Euphorbia berteroana | Balb. ex Spreng. | Euphorbiaceae | 8 |
| Euphorbia calcarata | (Schltdl.) V.W.Steinm. | Euphorbiaceae | 8 |
| Euphorbia cotinifolia | L. | Euphorbiaceae | 8 |
| Euphorbia cuphosperma | (Engelm.) Boiss. | Euphorbiaceae | 8 |
| Euphorbia graminea | Jacq. | Euphorbiaceae | 8 |
| Euphorbia heterophylla | L. | Euphorbiaceae | 8 |
| Euphorbia hirta | L. | Euphorbiaceae | 8 |
| Euphorbia hypericifolia | L. | Euphorbiaceae | 8 |
| Euphorbia hyssopifolia | L. | Euphorbiaceae | 8 |
| Euphorbia indivisa | (Engelm.) Tidestr. | Euphorbiaceae | 8 |
| Euphorbia macropus | (Klotzsch & Garcke) Boiss. | Euphorbiaceae | 8 |
| Euphorbia mendezii | Boiss. | Euphorbiaceae | 8 |
| Euphorbia nutans | Lag. | Euphorbiaceae | 8 |
| Euphorbia ophthalmica | Pers. | Euphorbiaceae | 8 |
| Euphorbia prostrata | Aiton | Euphorbiaceae | 8 |
| Euphorbia pulcherrima | Willd. ex Klotzsch | Euphorbiaceae | 8 |
| Euphorbia radians | Benth. | Euphorbiaceae | 8 |
| Euphorbia schiedeana | (Klotzsch & Garcke) Mayfield ex C.Nelson | Euphorbiaceae | 8 |
| Euphorbia schlechtendalii | Boiss. | Euphorbiaceae | 8 |
| Euphorbia segoviensis | Boiss. | Euphorbiaceae | 8 |
| Euphorbia serpens | Kunth | Euphorbiaceae | 8 |
| Euphorbia serpillifolia | Pers. | Euphorbiaceae | 8 |
| Euphorbia serrula | Engelm. | Euphorbiaceae | 8 |
| Euphorbia stictospora | Engelm. | Euphorbiaceae | 8 |
| Euphorbia thymifolia | L. | Euphorbiaceae | 8 |
| Euphorbia tithymaloides | L. | Euphorbiaceae | 8 |
| Euphorbia tricolor | Greenm. | Euphorbiaceae | 8 |
| Euphorbia velleriflora | (Klotzsch & Garcke) Boiss. | Euphorbiaceae | 8 |
| Euphorbia villifera | Scheele | Euphorbiaceae | 8 |
| Euploca confertifolia | (Torr.) Feuillet & Halse | Heliotropiaceae | 8 |
| Euploca foliosissima | (J.F.Macbr.) J.I.M.Melo | Heliotropiaceae | 8 |
| Euploca procumbens | (Mill.) Diane & Hilger | Heliotropiaceae | 8 |
| Eustoma exaltatum | (L.) Salisb. ex G.Don | Gentianaceae | 8 |
| Evolvulus alsinoides | (L.) L. | Convolvulaceae | 8 |
| Evolvulus arizonicus | A.Gray | Convolvulaceae | 8 |
| Evolvulus nummularius | (L.) L. | Convolvulaceae | 8 |
| Evolvulus prostratus | B.L.Rob. | Convolvulaceae | 8 |
| Evolvulus sericeus | Sw. | Convolvulaceae | 8 |
| Exostema caribaeum | (Jacq.) Schult. | Rubiaceae | 8 |
| Eysenhardtia polystachya | (Ortega) Sarg. | Fabaceae | 8 |
| Fagus grandifolia | Ehrh. | Fagaceae | 8 |
| Faramea occidentalis | (L.) A.Rich. | Rubiaceae | 8 |
| Ferocactus flavovirens | (Scheidw.) Britton & Rose | Cactaceae | 8 |
| Ferocactus haematacanthus | (Salm-Dyck) Bravo ex Backeb. & F.M.Knuth | Cactaceae | 8 |
| Ferocactus hamatacanthus | (Muehlenpf.) Britton & Rose | Cactaceae | 8 |
| Ferocactus histrix | (DC.) G.E.Linds. | Cactaceae | 8 |
| Ferocactus macrodiscus | (Mart.) Britton & Rose | Cactaceae | 8 |
| Ferocactus robustus | (Link & Otto) Britton & Rose | Cactaceae | 8 |
| Festuca arizonica | Vasey | Poaceae | 8 |
| Festuca rubra | L. | Poaceae | 8 |
| Ficus americana | Aubl. | Moraceae | 8 |
| Ficus aurea | Nutt. | Moraceae | 8 |
| Ficus citrifolia | Mill. | Moraceae | 8 |
| Ficus cotinifolia | Kunth | Moraceae | 8 |
| Ficus crocata | Mart. ex Miq. | Moraceae | 8 |
| Ficus insipida | Willd. | Moraceae | 8 |
| Ficus maxima | Mill. | Moraceae | 8 |
| Ficus obtusifolia | Kunth | Moraceae | 8 |
| Ficus pertusa | L.f. | Moraceae | 8 |
| Ficus petiolaris | Kunth | Moraceae | 8 |
| Fimbristylis complanata | (Retz.) Link | Cyperaceae | 8 |
| Fimbristylis dichotoma | (L.) Vahl | Cyperaceae | 8 |
| Fimbristylis spadicea | (L.) Vahl | Cyperaceae | 8 |
| Flaveria linearis | Lag. | Asteraceae | 8 |
| Flaveria trinervia | (Spreng.) C.Mohr | Asteraceae | 8 |
| Fleischmannia pycnocephala | (Less.) R.M.King & H.Rob. | Asteraceae | 8 |
| Fleischmanniopsis leucocephala | (Benth.) R.M.King & H.Rob. | Asteraceae | 8 |
| Florestina pedata | Cass. | Asteraceae | 8 |
| Florestina purpurea | Rydb. | Asteraceae | 8 |
| Forestiera angustifolia | Torr. | Oleaceae | 8 |
| Forestiera phillyreoides | (Benth.) Torr. | Oleaceae | 8 |
| Forestiera reticulata | Torr. | Oleaceae | 8 |
| Fouquieria formosa | Kunth | Fouquieriaceae | 8 |
| Fouquieria ochoterenae | Miranda | Fouquieriaceae | 8 |
| Fragaria vesca | L. | Rosaceae | 8 |
| Frangula capreifolia | (Schltdl.) Grubov | Rhamnaceae | 8 |
| Frangula mucronata | (Schltdl.) Grubov | Rhamnaceae | 8 |
| Fraxinus purpusii | Brandegee | Oleaceae | 8 |
| Fraxinus uhdei | (Wenz.) Lingelsh. | Oleaceae | 8 |
| Fraxinus velutina | Torr. | Oleaceae | 8 |
| Fridericia chica | (Bonpl.) L.G.Lohmann | Bignoniaceae | 8 |
| Fuchsia arborescens | Sims | Onagraceae | 8 |
| Fuchsia fulgens | DC. | Onagraceae | 8 |
| Fuchsia microphylla | Kunth | Onagraceae | 8 |
| Fuchsia paniculata | Lindl. | Onagraceae | 8 |
| Fuertesimalva limensis | (L.) Fryxell | Malvaceae | 8 |
| Fuirena simplex | Vahl | Cyperaceae | 8 |
| Funastrum angustifolium | (Pers.) Liede & Meve | Apocynaceae | 8 |
| Funastrum clausum | (Jacq.) Schltr. | Apocynaceae | 8 |
| Funastrum elegans | (Decne.) Schltr. | Apocynaceae | 8 |
| Funastrum pannosum | (Decne.) Schltr. | Apocynaceae | 8 |
| Gaga kaulfussii | (Kunze) Fay W.Li & Windham | Pteridaceae | 8 |
| Gaillardia mexicana | A.Gray | Asteraceae | 8 |
| Galactia striata | (Jacq.) Urb. | Fabaceae | 8 |
| Galeottiella sarcoglossa | (A.Rich. & Galeotti) Schltr. | Orchidaceae | 8 |
| Galianthe brasiliensis | (Spreng.) E.L.Cabral & Bacigalupo | Rubiaceae | 8 |
| Galinsoga parviflora | Cav. | Asteraceae | 8 |
| Galinsoga quadriradiata | Ruiz & Pav. | Asteraceae | 8 |
| Galium hypocarpium | (L.) Endl. ex Griseb. | Rubiaceae | 8 |
| Galium mexicanum | Kunth | Rubiaceae | 8 |
| Galium trifidum | L. | Rubiaceae | 8 |
| Galphimia glauca | Cav. | Malpighiaceae | 8 |
| Galphimia speciosa | C.E.Anderson | Malpighiaceae | 8 |
| Gamochaeta americana | (Mill.) Wedd. | Asteraceae | 8 |
| Gamochaeta pensylvanica | (Willd.) Cabrera | Asteraceae | 8 |
| Gamochaeta purpurea | (L.) Cabrera | Asteraceae | 8 |
| Garrya laurifolia | Benth. | Garryaceae | 8 |
| Gaultheria acuminata | Schltdl. & Cham. | Ericaceae | 8 |
| Gaultheria erecta | Vent. | Ericaceae | 8 |
| Gaultheria myrsinoides | Kunth | Ericaceae | 8 |
| Gelsemium sempervirens | (L.) J.St.-Hil. | Gelsemiaceae | 8 |
| Gentiana bicuspidata | (G.Don) Briq. | Gentianaceae | 8 |
| Gentiana spathacea | Kunth | Gentianaceae | 8 |
| Geranium potentillifolium | DC. | Geraniaceae | 8 |
| Geranium seemannii | Peyr. | Geraniaceae | 8 |
| Geum aleppicum | Jacq. | Rosaceae | 8 |
| Geum canadense | Jacq. | Rosaceae | 8 |
| Gibasis consobrina | D.R.Hunt | Commelinaceae | 8 |
| Gibasis geniculata | (Jacq.) Rohweder | Commelinaceae | 8 |
| Giliastrum rigidulum | Rydb. | Polemoniaceae | 8 |
| Gleichenella pectinata | (Willd.) Ching | Gleicheniaceae | 8 |
| Glinus radiatus | (Ruiz & Pav.) Rohrb. | Molluginaceae | 8 |
| Gliricidia sepium | (Jacq.) Kunth | Fabaceae | 8 |
| Glyceria septentrionalis | Hitchc. | Poaceae | 8 |
| Glyceria striata | (Lam.) Hitchc. | Poaceae | 8 |
| Gnaphaliothamnus lavandulifolius | (Kunth) G.L.Nesom | Asteraceae | 8 |
| Gomphrena serrata | L. | Amaranthaceae | 8 |
| Gongora galeata | (Lindl. ex Bosse) Rchb.f. | Orchidaceae | 8 |
| Gonolobus barbatus | Kunth | Apocynaceae | 8 |
| Gonolobus erianthus | Decne. | Apocynaceae | 8 |
| Gonolobus grandiflorus | (Cav.) Schult. | Apocynaceae | 8 |
| Gonolobus pectinatus | Brandegee | Apocynaceae | 8 |
| Gonolobus uniflorus | Kunth | Apocynaceae | 8 |
| Goodyera striata | Rchb.f. | Orchidaceae | 8 |
| Gossypium aridum | (Rose & Standl.) Skovsted | Malvaceae | 8 |
| Gossypium hirsutum | L. | Malvaceae | 8 |
| Gouania lupuloides | (L.) Urb. | Rhamnaceae | 8 |
| Govenia dressleriana | E.W.Greenw. | Orchidaceae | 8 |
| Govenia liliacea | (Lex.) Lindl. | Orchidaceae | 8 |
| Govenia superba | (Lex.) Lindl. | Orchidaceae | 8 |
| Govenia utriculata | (Sw.) Lindl. | Orchidaceae | 8 |
| Grindelia hirtella | (B.L.Rob. & Greenm.) Adr.Bartoli & Tortosa | Asteraceae | 8 |
| Grindelia inuloides | Willd. | Asteraceae | 8 |
| Grona triflora | (L.) H.Ohashi & K.Ohashi | Fabaceae | 8 |
| Gronovia scandens | L. | Loasaceae | 8 |
| Guaiacum coulteri | A.Gray | Zygophyllaceae | 8 |
| Guarea guidonia | (L.) Sleumer | Meliaceae | 8 |
| Guarianthe aurantiaca | (Bateman ex Lindl.) Dressler & W.E.Higgins | Orchidaceae | 8 |
| Guatteria amplifolia | Triana & Planch. | Annonaceae | 8 |
| Guazuma ulmifolia | Lam. | Malvaceae | 8 |
| Guettarda elliptica | Sw. | Rubiaceae | 8 |
| Guilleminea densa | (Humb. & Bonpl. ex Schult.) Moq. | Amaranthaceae | 8 |
| Gymnosiphon suaveolens | (H.Karst.) Urb. | Burmanniaceae | 8 |
| Gymnosperma glutinosum | (Spreng.) Less. | Asteraceae | 8 |
| Gynerium sagittatum | (Aubl.) P.Beauv. | Poaceae | 8 |
| Gyrocarpus americanus | Jacq. | Hernandiaceae | 8 |
| Gyrocarpus jatrophifolius | Domin | Hernandiaceae | 8 |
| Gyrocarpus mocinoi | Espejo | Hernandiaceae | 8 |
| Habenaria floribunda | Lindl. | Orchidaceae | 8 |
| Habenaria macroceratitis | Willd. | Orchidaceae | 8 |
| Habenaria trifida | Kunth | Orchidaceae | 8 |
| Habranthus longifolius | (Hemsl.) Flagg, G.Lom.Sm. & Meerow | Amaryllidaceae | 8 |
| Haematoxylum brasiletto | H.Karst. | Fabaceae | 8 |
| Halerpestes cymbalaria | Greene | Ranunculaceae | 8 |
| Hamelia patens | Jacq. | Rubiaceae | 8 |
| Hamelia xorullensis | Kunth | Rubiaceae | 8 |
| Handroanthus impetiginosus | (Mart. ex DC.) Mattos | Bignoniaceae | 8 |
| Haplophyton cimicidum | A.DC. | Apocynaceae | 8 |
| Hauya elegans | Moc. & Sessé ex DC. | Onagraceae | 8 |
| Havardia pallens | (Benth.) Britton & Rose | Fabaceae | 8 |
| Hebecarpa barbeyana | (Chodat) J.R.Abbott | Polygalaceae | 8 |
| Hebecarpa obscura | (Benth.) J.R.Abbott | Polygalaceae | 8 |
| Hechtia glomerata | Zucc. | Bromeliaceae | 8 |
| Hechtia sphaeroblasta | B.L.Rob. | Bromeliaceae | 8 |
| Hedeoma costata | A.Gray | Lamiaceae | 8 |
| Hedyosmum mexicanum | C.Cordem. | Chloranthaceae | 8 |
| Heimia salicifolia | Link | Lythraceae | 8 |
| Helenium mexicanum | Kunth | Asteraceae | 8 |
| Helianthus annuus | L. | Asteraceae | 8 |
| Helianthus laciniatus | A.Gray | Asteraceae | 8 |
| Heliconia bihai | (L.) L. | Heliconiaceae | 8 |
| Heliconia schiedeana | Klotzsch | Heliconiaceae | 8 |
| Helicteres baruensis | Jacq. | Malvaceae | 8 |
| Helicteres guazumifolia | Kunth | Malvaceae | 8 |
| Helietta parvifolia | Benth. | Rutaceae | 8 |
| Heliocarpus americanus | L. | Malvaceae | 8 |
| Heliocarpus terebinthinaceus | (DC.) Hochr. | Malvaceae | 8 |
| Heliomeris multiflora | Nutt. | Asteraceae | 8 |
| Heliopsis annua | Hemsl. | Asteraceae | 8 |
| Heliopsis buphthalmoides | Dunal | Asteraceae | 8 |
| Heliotropium angiospermum | Murray | Heliotropiaceae | 8 |
| Heliotropium curassavicum | L. | Heliotropiaceae | 8 |
| Heliotropium rufipilum | (Benth.) I.M.Johnst. | Heliotropiaceae | 8 |
| Heliotropium verdcourtii | Craven | Heliotropiaceae | 8 |
| Hemionitis palmata | L. | Pteridaceae | 8 |
| Henrya insularis | Nees | Acanthaceae | 8 |
| Herissantia crispa | (L.) Brizicky | Malvaceae | 8 |
| Hesperalbizia occidentalis | (Brandegee) Barneby & J.W.Grimes | Fabaceae | 8 |
| Hesperidanthus linearifolius | (A.Gray) Rydb. | Brassicaceae | 8 |
| Hesperocyparis benthamii | (Endl.) Bartel | Cupressaceae | 8 |
| Hesperocyparis lusitanica | (Mill.) Bartel | Cupressaceae | 8 |
| Heteranthera dubia | (Jacq.) MacMill. | Pontederiaceae | 8 |
| Heteranthera limosa | (Sw.) Willd. | Pontederiaceae | 8 |
| Heteranthera reniformis | Ruiz & Pav. | Pontederiaceae | 8 |
| Heterocentron elegans | (Schltdl.) Kuntze | Melastomataceae | 8 |
| Heterocentron subtriplinervium | (Link & Otto) A.Braun & C.D.Bouché | Melastomataceae | 8 |
| Heteropogon contortus | (L.) P.Beauv. ex Roem. & Schult. | Poaceae | 8 |
| Heteropogon melanocarpus | (Elliott) Benth. | Poaceae | 8 |
| Heteropterys brachiata | (L.) DC. | Malpighiaceae | 8 |
| Heterosperma pinnatum | Cav. | Asteraceae | 8 |
| Heterotheca inuloides | Cass. | Asteraceae | 8 |
| Hexasepalum teres | (Walter) J.H.Kirkbr. | Rubiaceae | 8 |
| Hibiscus martianus | Zucc. | Malvaceae | 8 |
| Hibiscus phoeniceus | Jacq. | Malvaceae | 8 |
| Hibiscus tiliaceus | L. | Malvaceae | 8 |
| Hidalgoa ternata | La Llave | Asteraceae | 8 |
| Hieracium abscissum | Less. | Asteraceae | 8 |
| Hieracium fendleri | Sch.Bip. | Asteraceae | 8 |
| Hilaria belangeri | (Steud.) Nash | Poaceae | 8 |
| Hilaria cenchroides | Kunth | Poaceae | 8 |
| Hintonia latiflora | (Sessé & Moc. ex DC.) Bullock | Rubiaceae | 8 |
| Hippocratea volubilis | L. | Celastraceae | 8 |
| Hirtella racemosa | Lam. | Chrysobalanaceae | 8 |
| Hoffmannseggia glauca | (Ortega) Eifert | Fabaceae | 8 |
| Holodiscus discolor | (Pursh) Maxim. | Rosaceae | 8 |
| Hopia obtusa | (Kunth) Zuloaga & Morrone | Poaceae | 8 |
| Hordeum jubatum | L. | Poaceae | 8 |
| Houstonia rubra | Cav. | Rubiaceae | 8 |
| Houstonia wrightii | A.Gray | Rubiaceae | 8 |
| Hunnemannia fumariifolia | Sweet | Papaveraceae | 8 |
| Hura polyandra | Baill. | Euphorbiaceae | 8 |
| Hybridella globosa | Cass. | Asteraceae | 8 |
| Hydrocharis laevigata | (Humb. & Bonpl. ex Willd.) Byng & Christenh. | Hydrocharitaceae | 8 |
| Hydrocotyle bonariensis | Comm. ex Lam. | Araliaceae | 8 |
| Hydrocotyle mexicana | Schltdl. & Cham. | Araliaceae | 8 |
| Hydrocotyle ranunculoides | L.f. | Araliaceae | 8 |
| Hydrocotyle umbellata | L. | Araliaceae | 8 |
| Hydrocotyle verticillata | Thunb. | Araliaceae | 8 |
| Hydrogalium claytonii | (Michx.) Kadereit & Schneew. | Rubiaceae | 8 |
| Hydrolea spinosa | L. | Hydroleaceae | 8 |
| Hylodesmum glutinosum | (Muhl. ex Willd.) H.Ohashi & R.R.Mill | Fabaceae | 8 |
| Hymenaea courbaril | L. | Fabaceae | 8 |
| Hymenostephium cordatum | S.F.Blake | Asteraceae | 8 |
| Hymenoxys integrifolia | (Kunth) Bierner | Asteraceae | 8 |
| Hypericum hypericoides | (L.) Crantz | Hypericaceae | 8 |
| Hypericum scouleri | Hook. | Hypericaceae | 8 |
| Hypericum silenoides | Juss. | Hypericaceae | 8 |
| Hypopitys monotropa | Crantz | Ericaceae | 8 |
| Hypoxis decumbens | L. | Hypoxidaceae | 8 |
| Hyptis brevipes | Poit. | Lamiaceae | 8 |
| Hyptis capitata | Jacq. | Lamiaceae | 8 |
| Ichnanthus pallens | (Sw.) Munro ex Benth. | Poaceae | 8 |
| Ilex brandegeeana | Loes. | Aquifoliaceae | 8 |
| Ilex cassine | L. | Aquifoliaceae | 8 |
| Illicium floridanum | J.Ellis | Schisandraceae | 8 |
| Indigofera miniata | Ortega | Fabaceae | 8 |
| Indigofera suffruticosa | Mill. | Fabaceae | 8 |
| Inga oerstediana | Benth. | Fabaceae | 8 |
| Inga punctata | Willd. | Fabaceae | 8 |
| Inga vera | Willd. | Fabaceae | 8 |
| Iochroma arborescens | (L.) J.M.H.Shaw | Solanaceae | 8 |
| Iostephane heterophylla | Benth. | Asteraceae | 8 |
| Ipomoea alba | L. | Convolvulaceae | 8 |
| Ipomoea anisomeres | B.L.Rob. & Bartlett | Convolvulaceae | 8 |
| Ipomoea arborescens | (Humb. & Bonpl. ex Willd.) G.Don | Convolvulaceae | 8 |
| Ipomoea aristolochiifolia | G.Don | Convolvulaceae | 8 |
| Ipomoea batatoides | Choisy | Convolvulaceae | 8 |
| Ipomoea bracteata | Cav. | Convolvulaceae | 8 |
| Ipomoea capillacea | (Kunth) G.Don | Convolvulaceae | 8 |
| Ipomoea carnea | Jacq. | Convolvulaceae | 8 |
| Ipomoea cholulensis | Kunth | Convolvulaceae | 8 |
| Ipomoea conzattii | Greenm. | Convolvulaceae | 8 |
| Ipomoea corymbosa | (L.) Roth | Convolvulaceae | 8 |
| Ipomoea costellata | Torr. | Convolvulaceae | 8 |
| Ipomoea cristulata | Hallier f. | Convolvulaceae | 8 |
| Ipomoea dumetorum | Willd. | Convolvulaceae | 8 |
| Ipomoea dumosa | (Benth.) L.O.Williams | Convolvulaceae | 8 |
| Ipomoea elongata | Choisy | Convolvulaceae | 8 |
| Ipomoea emetica | Choisy | Convolvulaceae | 8 |
| Ipomoea funis | Cham. & Schltdl. | Convolvulaceae | 8 |
| Ipomoea hartwegii | Benth. | Convolvulaceae | 8 |
| Ipomoea hederacea | Jacq. | Convolvulaceae | 8 |
| Ipomoea hederifolia | L. | Convolvulaceae | 8 |
| Ipomoea indica | (Burm.) Merr. | Convolvulaceae | 8 |
| Ipomoea intrapilosa | Rose | Convolvulaceae | 8 |
| Ipomoea lindenii | M.Martens & Galeotti | Convolvulaceae | 8 |
| Ipomoea mairetii | Choisy | Convolvulaceae | 8 |
| Ipomoea meyeri | (Spreng.) G.Don | Convolvulaceae | 8 |
| Ipomoea minutiflora | (M.Martens & Galeotti) House | Convolvulaceae | 8 |
| Ipomoea muricata | (L.) Jacq. | Convolvulaceae | 8 |
| Ipomoea murucoides | Roem. & Schult. | Convolvulaceae | 8 |
| Ipomoea neei | (Spreng.) O'Donell | Convolvulaceae | 8 |
| Ipomoea nil | (L.) Roth | Convolvulaceae | 8 |
| Ipomoea orizabensis | (G.Pelletan) Ledeb. ex Steud. | Convolvulaceae | 8 |
| Ipomoea parasitica | (Kunth) G.Don | Convolvulaceae | 8 |
| Ipomoea pauciflora | M.Martens & Galeotti | Convolvulaceae | 8 |
| Ipomoea pedicellaris | Benth. | Convolvulaceae | 8 |
| Ipomoea plummerae | A.Gray | Convolvulaceae | 8 |
| Ipomoea populina | House | Convolvulaceae | 8 |
| Ipomoea pubescens | Lam. | Convolvulaceae | 8 |
| Ipomoea purpurea | (L.) Roth | Convolvulaceae | 8 |
| Ipomoea quamoclit | L. | Convolvulaceae | 8 |
| Ipomoea robinsonii | House | Convolvulaceae | 8 |
| Ipomoea seducta | House | Convolvulaceae | 8 |
| Ipomoea squamosa | Choisy | Convolvulaceae | 8 |
| Ipomoea stans | Cav. | Convolvulaceae | 8 |
| Ipomoea suaveolens | (M.Martens & Galeotti) Hemsl. | Convolvulaceae | 8 |
| Ipomoea ternifolia | Cav. | Convolvulaceae | 8 |
| Ipomoea tiliacea | (Willd.) Choisy | Convolvulaceae | 8 |
| Ipomoea tricolor | Cav. | Convolvulaceae | 8 |
| Ipomoea trifida | (Kunth) G.Don | Convolvulaceae | 8 |
| Ipomoea triloba | L. | Convolvulaceae | 8 |
| Ipomoea wolcottiana | Rose | Convolvulaceae | 8 |
| Iresine ajuscana | Suess. & Beyerle ex Suess. | Amaranthaceae | 8 |
| Iresine calea | (Ibáñez) Standl. | Amaranthaceae | 8 |
| Iresine diffusa | Humb. & Bonpl. ex Willd. | Amaranthaceae | 8 |
| Iresine heterophylla | Standl. | Amaranthaceae | 8 |
| Isochilus major | Schltdl. & Cham. | Orchidaceae | 8 |
| Isolatocereus dumortieri | (Scheidw.) Backeb. | Cactaceae | 8 |
| Jacaratia mexicana | A.DC. | Caricaceae | 8 |
| Jacquemontia evolvuloides | Meisn. | Convolvulaceae | 8 |
| Jacquemontia nodiflora | (Desr.) G.Don | Convolvulaceae | 8 |
| Jacquemontia smithii | B.L.Rob. & Greenm. | Convolvulaceae | 8 |
| Jacquemontia tamnifolia | (L.) Griseb. | Convolvulaceae | 8 |
| Jaegeria hirta | (Lag.) Less. | Asteraceae | 8 |
| Jaltomata procumbens | (Cav.) J.L.Gentry | Solanaceae | 8 |
| Jarava ichu | Ruiz & Pav. | Poaceae | 8 |
| Jatropha cordata | (Ortega) Müll.Arg. | Euphorbiaceae | 8 |
| Jatropha curcas | L. | Euphorbiaceae | 8 |
| Jatropha dioica | Sessé | Euphorbiaceae | 8 |
| Jatropha oaxacana | J.Jiménez Ram. & R.Torres | Euphorbiaceae | 8 |
| Johnstonella albida | (Kunth) M.E.Mabry & M.G.Simpson | Boraginaceae | 8 |
| Juglans major | (Torr.) A.Heller | Juglandaceae | 8 |
| Juglans mollis | Engelm. | Juglandaceae | 8 |
| Juncus acuminatus | Michx. | Juncaceae | 8 |
| Juncus balticus | Willd. | Juncaceae | 8 |
| Juncus biflorus | Elliott | Juncaceae | 8 |
| Juncus bufonius | L. | Juncaceae | 8 |
| Juncus dichotomus | Elliott | Juncaceae | 8 |
| Juncus dudleyi | Wiegand | Juncaceae | 8 |
| Juncus effusus | L. | Juncaceae | 8 |
| Juncus ensifolius | Wikstr. | Juncaceae | 8 |
| Juncus marginatus | Rostk. | Juncaceae | 8 |
| Juncus microcephalus | Kunth | Juncaceae | 8 |
| Juncus nodosus | L. | Juncaceae | 8 |
| Juncus patens | E.Mey. | Juncaceae | 8 |
| Juncus tenuis | Willd. | Juncaceae | 8 |
| Juncus xiphioides | E.Mey. | Juncaceae | 8 |
| Juniperus deppeana | Steud. | Cupressaceae | 8 |
| Juniperus flaccida | Schltdl. | Cupressaceae | 8 |
| Justicia aurea | Schltdl. | Acanthaceae | 8 |
| Justicia brandegeeana | Wassh. & L.B.Sm. | Acanthaceae | 8 |
| Justicia pacifica | (Oerst.) Hemsl. | Acanthaceae | 8 |
| Justicia pilosella | (Nees) Hilsenb. | Acanthaceae | 8 |
| Justicia pringlei | B.L.Rob. | Acanthaceae | 8 |
| Justicia spicigera | Schltdl. | Acanthaceae | 8 |
| Kallstroemia maxima | (L.) Hook. & Arn. | Zygophyllaceae | 8 |
| Kallstroemia parviflora | Norton | Zygophyllaceae | 8 |
| Kallstroemia rosei | Rydb. | Zygophyllaceae | 8 |
| Karwinskia humboldtiana | (Schult.) Zucc. | Rhamnaceae | 8 |
| Kearnemalvastrum lacteum | (Aiton) D.M.Bates | Malvaceae | 8 |
| Kearnemalvastrum subtriflorum | (Lag.) D.M.Bates | Malvaceae | 8 |
| Knowltonia mexicana | (Kunth) Christenh. & Byng | Ranunculaceae | 8 |
| Koeberlinia spinosa | Zucc. | Koeberliniaceae | 8 |
| Koeleria macrantha | (Ledeb.) Schult. | Poaceae | 8 |
| Koeleria spicata | (L.) Barberá, Quintanar, Soreng & P.M.Peterson | Poaceae | 8 |
| Kosteletzkya depressa | (L.) O.J.Blanch., Fryxell & D.M.Bates | Malvaceae | 8 |
| Krameria cytisoides | Cav. | Krameriaceae | 8 |
| Krugiodendron ferreum | (Vahl) Urb. | Rhamnaceae | 8 |
| Lacistema aggregatum | (P.J.Bergius) Rusby | Lacistemataceae | 8 |
| Lactuca graminifolia | Michx. | Asteraceae | 8 |
| Laelia albida | Bateman ex Lindl. | Orchidaceae | 8 |
| Laelia anceps | Lindl. | Orchidaceae | 8 |
| Laelia autumnalis | (Lex.) Lindl. | Orchidaceae | 8 |
| Laelia rubescens | Lindl. | Orchidaceae | 8 |
| Laennecia filaginoides | DC. | Asteraceae | 8 |
| Laennecia schiedeana | (Less.) G.L.Nesom | Asteraceae | 8 |
| Laennecia sophiifolia | (Kunth) G.L.Nesom | Asteraceae | 8 |
| Lagascea decipiens | Hemsl. | Asteraceae | 8 |
| Lagascea helianthifolia | Kunth | Asteraceae | 8 |
| Lagascea mollis | Cav. | Asteraceae | 8 |
| Laguncularia racemosa | (L.) C.F.Gaertn. | Combretaceae | 8 |
| Lamourouxia dasyantha | (Cham. & Schltdl.) W.R.Ernst | Orobanchaceae | 8 |
| Lamourouxia multifida | Kunth | Orobanchaceae | 8 |
| Lamourouxia nelsonii | B.L.Rob. & Greenm. | Orobanchaceae | 8 |
| Lamourouxia rhinanthifolia | Kunth | Orobanchaceae | 8 |
| Lamourouxia viscosa | Kunth | Orobanchaceae | 8 |
| Lamourouxia xalapensis | Kunth | Orobanchaceae | 8 |
| Lantana achyranthifolia | Desf. | Verbenaceae | 8 |
| Lantana camara | L. | Verbenaceae | 8 |
| Lantana canescens | Kunth | Verbenaceae | 8 |
| Lantana hirta | Graham | Verbenaceae | 8 |
| Lantana horrida | Kunth | Verbenaceae | 8 |
| Lantana involucrata | L. | Verbenaceae | 8 |
| Lantana trifolia | L. | Verbenaceae | 8 |
| Lantana urticoides | Hayek | Verbenaceae | 8 |
| Lantana velutina | M.Martens & Galeotti | Verbenaceae | 8 |
| Laportea canadensis | (L.) Wedd. | Urticaceae | 8 |
| Lasiacis divaricata | (L.) Hitchc. | Poaceae | 8 |
| Lasiacis ruscifolia | (Kunth) Hitchc. ex Chase | Poaceae | 8 |
| Lasianthaea aurea | (D.Don) K.M.Becker | Asteraceae | 8 |
| Lasianthaea fruticosa | (L.) K.M.Becker | Asteraceae | 8 |
| Ledenbergia macrantha | Standl. | Petiveriaceae | 8 |
| Leersia hexandra | Sw. | Poaceae | 8 |
| Leibnitzia lyrata | (Sch.Bip.) G.L.Nesom | Asteraceae | 8 |
| Lemaireocereus hollianus | (F.A.C.Weber ex J.M.Coult.) Britton & Rose | Cactaceae | 8 |
| Lemna aequinoctialis | Welw. | Araceae | 8 |
| Lemna gibba | L. | Araceae | 8 |
| Lemna minor | L. | Araceae | 8 |
| Lemna minuta | Kunth | Araceae | 8 |
| Lemna trisulca | L. | Araceae | 8 |
| Lennoa madreporoides | Lex. | Lennoaceae | 8 |
| Lepechinia caulescens | (Ortega) Epling | Lamiaceae | 8 |
| Lepechinia schiedeana | (Schltdl.) Vatke | Lamiaceae | 8 |
| Lepidagathis alopecuroidea | (Vahl) R.Br. ex Griseb. | Acanthaceae | 8 |
| Lepidaploa canescens | (Kunth) H.Rob. | Asteraceae | 8 |
| Lepidium bipinnatifidum | Desv. | Brassicaceae | 8 |
| Lepidium lasiocarpum | Nutt. | Brassicaceae | 8 |
| Lepidium oblongum | Small | Brassicaceae | 8 |
| Lepidium virginicum | L. | Brassicaceae | 8 |
| Leptochloa panicea | (Retz.) Ohwi | Poaceae | 8 |
| Leptochloa pluriflora | (E.Fourn.) P.M.Peterson & N.Snow | Poaceae | 8 |
| Leptospron adenanthum | (G.Mey.) A.Delgado | Fabaceae | 8 |
| Leucaena diversifolia | (Schltdl.) Benth. | Fabaceae | 8 |
| Leucaena esculenta | (Moc. & Sessé ex DC.) Benth. | Fabaceae | 8 |
| Leucaena leucocephala | (Lam.) de Wit | Fabaceae | 8 |
| Leucaena pulverulenta | (Schltdl.) Benth. | Fabaceae | 8 |
| Libidibia coriaria | (Jacq.) Schltdl. | Fabaceae | 8 |
| Limosella acaulis | Sessé & Moc. | Plantaginaceae | 8 |
| Limosella aquatica | L. | Plantaginaceae | 8 |
| Lindernia dubia | (L.) Pennell | Linderniaceae | 8 |
| Lindleya mespiloides | Kunth | Rosaceae | 8 |
| Linum australe | A.Heller | Linaceae | 8 |
| Linum rupestre | Engelm. ex A.Gray | Linaceae | 8 |
| Liparis vexillifera | (Lex.) Cogn. | Orchidaceae | 8 |
| Lippia alba | (Mill.) N.E.Br. ex Britton & P.Wilson | Verbenaceae | 8 |
| Lippia dulcis | Trevir. | Verbenaceae | 8 |
| Lippia myriocephala | Schltdl. & Cham. | Verbenaceae | 8 |
| Lippia umbellata | Cav. | Verbenaceae | 8 |
| Liquidambar styraciflua | L. | Altingiaceae | 8 |
| Lisianthius nigrescens | Schltdl. & Cham. | Gentianaceae | 8 |
| Lithospermum distichum | Ortega | Boraginaceae | 8 |
| Lithospermum exsertum | (D.Don) J.I.Cohen | Boraginaceae | 8 |
| Litsea glaucescens | Kunth | Lauraceae | 8 |
| Llavea cordifolia | Lag. | Pteridaceae | 8 |
| Lobelia cardinalis | L. | Campanulaceae | 8 |
| Lobelia fenestralis | Cav. | Campanulaceae | 8 |
| Lobelia irasuensis | Planch. & Oerst. | Campanulaceae | 8 |
| Lobelia laxiflora | Kunth | Campanulaceae | 8 |
| Lobelia longicaulis | Brandegee | Campanulaceae | 8 |
| Loeselia coerulea | G.Don | Polemoniaceae | 8 |
| Loeselia glandulosa | (Cav.) G.Don | Polemoniaceae | 8 |
| Loeselia mexicana | Brand | Polemoniaceae | 8 |
| Loeselia pumila | Walp. | Polemoniaceae | 8 |
| Lonchocarpus rugosus | Benth. | Fabaceae | 8 |
| Lonicera pilosa | Willd. ex Kunth | Caprifoliaceae | 8 |
| Lopezia miniata | DC. | Onagraceae | 8 |
| Lopezia racemosa | Cav. | Onagraceae | 8 |
| Lophocereus marginatus | (DC.) S.Arias & Terrazas | Cactaceae | 8 |
| Lophosoria quadripinnata | (J.F.Gmel.) C.Chr. | Dicksoniaceae | 8 |
| Lophospermum erubescens | D.Don | Plantaginaceae | 8 |
| Ludwigia bonariensis | (Micheli) H.Hara | Onagraceae | 8 |
| Ludwigia leptocarpa | (Nutt.) H.Hara | Onagraceae | 8 |
| Ludwigia octovalvis | (Jacq.) P.H.Raven | Onagraceae | 8 |
| Ludwigia palustris | (L.) Elliott | Onagraceae | 8 |
| Ludwigia peploides | (Kunth) P.H.Raven | Onagraceae | 8 |
| Ludwigia repens | J.R.Forst. | Onagraceae | 8 |
| Lupinus aschenbornii | S.Schauer | Fabaceae | 8 |
| Lupinus elegans | Kunth | Fabaceae | 8 |
| Lupinus montanus | Kunth | Fabaceae | 8 |
| Luziola fluitans | (Michx.) Terrell & H.Rob. | Poaceae | 8 |
| Lycianthes ciliolata | (M.Martens & Galeotti) Bitter | Solanaceae | 8 |
| Lycianthes scandens | (Mill.) M.Nee | Solanaceae | 8 |
| Lycium boerhaviifolium | L.f. | Solanaceae | 8 |
| Lycium carolinianum | Walter | Solanaceae | 8 |
| Lygodium heterodoxum | Kunze | Lygodiaceae | 8 |
| Lygodium venustum | Sw. | Lygodiaceae | 8 |
| Lysiloma acapulcense | (Kunth) Benth. | Fabaceae | 8 |
| Lysiloma divaricatum | (Jacq.) J.F.Macbr. | Fabaceae | 8 |
| Lysimachia minima | (L.) U.Manns & Anderb. | Primulaceae | 8 |
| Lysimachia ovalis | (Ruiz & Pav.) U.Manns & Anderb. | Primulaceae | 8 |
| Lythrum alatum | Pursh | Lythraceae | 8 |
| Mabea occidentalis | Benth. | Euphorbiaceae | 8 |
| Machaerium biovulatum | Micheli | Fabaceae | 8 |
| Maclura tinctoria | (L.) D.Don ex G.Don | Moraceae | 8 |
| Macroptilium atropurpureum | (DC.) Urb. | Fabaceae | 8 |
| Macroptilium gibbosifolium | (Ortega) A.Delgado | Fabaceae | 8 |
| Macroscepis diademata | (Ker Gawl.) W.D.Stevens | Apocynaceae | 8 |
| Magnolia dealbata | Zucc. | Magnoliaceae | 8 |
| Malachra alceifolia | Jacq. | Malvaceae | 8 |
| Malachra capitata | (L.) L. | Malvaceae | 8 |
| Malachra fasciata | Jacq. | Malvaceae | 8 |
| Malacomeles denticulata | (Kunth) Decne. | Rosaceae | 8 |
| Malacomeles nervosa | (Decne.) G.N.Jones | Rosaceae | 8 |
| Malaxis brachyrrhynchos | (Rchb.f.) Ames | Orchidaceae | 8 |
| Malaxis macrostachya | (Lex.) Kuntze | Orchidaceae | 8 |
| Malaxis unifolia | Michx. | Orchidaceae | 8 |
| Malpighia glabra | L. | Malpighiaceae | 8 |
| Malvastrum americanum | (L.) Torr. | Malvaceae | 8 |
| Malvastrum coromandelianum | (L.) Garcke | Malvaceae | 8 |
| Malvaviscus arboreus | Dill. ex Cav. | Malvaceae | 8 |
| Malvaviscus penduliflorus | DC. | Malvaceae | 8 |
| Malvella lepidota | (A.Gray) Fryxell | Malvaceae | 8 |
| Malvella leprosa | (Ortega) Krapov. | Malvaceae | 8 |
| Mammillaria beneckei | Ehrenb. | Cactaceae | 8 |
| Mammillaria carnea | Zucc. ex Pfeiff. | Cactaceae | 8 |
| Mammillaria compressa | DC. | Cactaceae | 8 |
| Mammillaria crinita | DC. | Cactaceae | 8 |
| Mammillaria haageana | Pfeiff. | Cactaceae | 8 |
| Mammillaria lasiacantha | Engelm. | Cactaceae | 8 |
| Mammillaria magnimamma | Haw. | Cactaceae | 8 |
| Mammillaria mystax | Mart. | Cactaceae | 8 |
| Mammillaria polyedra | Mart. | Cactaceae | 8 |
| Mammillaria uncinata | Zucc. ex Pfeiff. | Cactaceae | 8 |
| Mammillaria zephyranthoides | Scheidw. | Cactaceae | 8 |
| Mandevilla foliosa | (Müll.Arg.) Hemsl. | Apocynaceae | 8 |
| Mandevilla hypoleuca | (Benth.) Pichon | Apocynaceae | 8 |
| Mandevilla subsagittata | (Ruiz & Pav.) Woodson | Apocynaceae | 8 |
| Mandevilla torosa | (Jacq.) Woodson | Apocynaceae | 8 |
| Manettia reclinata | L. | Rubiaceae | 8 |
| Manihot angustiloba | (Torr.) Müll.Arg. | Euphorbiaceae | 8 |
| Manilkara zapota | (L.) P.Royen | Sapotaceae | 8 |
| Maranta arundinacea | L. | Marantaceae | 8 |
| Margaritaria nobilis | L.f. | Phyllanthaceae | 8 |
| Marina filiciformis | (B.L.Rob. & Greenm.) Piñeros-U. & F.González | Fabaceae | 8 |
| Marina spiciformis | (Rose) Barneby | Fabaceae | 8 |
| Marsilea vestita | Hook. & Grev. | Marsileaceae | 8 |
| Martynia annua | L. | Martyniaceae | 8 |
| Maurandella antirrhiniflora | (Humb. & Bonpl. ex Willd.) Rothm. | Plantaginaceae | 8 |
| Maurandya barclayana | Lindl. | Plantaginaceae | 8 |
| Maxillaria densa | Lindl. | Orchidaceae | 8 |
| Maxillaria variabilis | Bateman ex Lindl. | Orchidaceae | 8 |
| Mayaca fluviatilis | Aubl. | Mayacaceae | 8 |
| Maytenus phyllanthoides | Benth. | Celastraceae | 8 |
| Mecardonia procumbens | (Mill.) Small | Plantaginaceae | 8 |
| Melampodium divaricatum | DC. | Asteraceae | 8 |
| Melampodium gracile | Less. | Asteraceae | 8 |
| Melampodium montanum | Benth. | Asteraceae | 8 |
| Melampodium perfoliatum | (Cav.) Kunth | Asteraceae | 8 |
| Melampodium sericeum | Lag. | Asteraceae | 8 |
| Melampodium strigosum | Stuessy | Asteraceae | 8 |
| Melanthera nivea | (L.) Small | Asteraceae | 8 |
| Meliosma dentata | (Liebm.) Urb. | Sabiaceae | 8 |
| Melochia nodiflora | Sw. | Malvaceae | 8 |
| Melochia pyramidata | L. | Malvaceae | 8 |
| Melochia tomentosa | L. | Malvaceae | 8 |
| Melothria pendula | L. | Cucurbitaceae | 8 |
| Melothria scabra | Naudin | Cucurbitaceae | 8 |
| Meniscium serratum | Cav. | Thelypteridaceae | 8 |
| Mentha canadensis | L. | Lamiaceae | 8 |
| Mentzelia aspera | L. | Loasaceae | 8 |
| Mentzelia hispida | Willd. | Loasaceae | 8 |
| Mesadenus lucayanus | (Britton) Schltr. | Orchidaceae | 8 |
| Mesosphaerum oblongifolium | (Benth.) Kuntze | Lamiaceae | 8 |
| Mesosphaerum pectinatum | (L.) Kuntze | Lamiaceae | 8 |
| Mesosphaerum suaveolens | (L.) Kuntze | Lamiaceae | 8 |
| Mesosphaerum urticodes | (Kunth) Kuntze | Lamiaceae | 8 |
| Mespilodaphne veraguensis | (Meisn.) Rohwer | Lauraceae | 8 |
| Metastelma lanceolatum | Schltr. | Apocynaceae | 8 |
| Metastelma palmeri | S.Watson | Apocynaceae | 8 |
| Metastelma schlechtendalii | Decne. | Apocynaceae | 8 |
| Miconia argentea | (Sw.) DC. | Melastomataceae | 8 |
| Miconia baillonii | M.Gómez | Melastomataceae | 8 |
| Miconia cornoides | (Schltdl. & Cham.) Almeda | Melastomataceae | 8 |
| Miconia crenata | (Vahl) Michelang. | Melastomataceae | 8 |
| Miconia dentata | (D.Don) Michelang. | Melastomataceae | 8 |
| Miconia glaberrima | (Schltdl.) Naudin | Melastomataceae | 8 |
| Miconia gracilis | Triana | Melastomataceae | 8 |
| Miconia ibaguensis | (Bonpl.) Triana | Melastomataceae | 8 |
| Miconia impetiolaris | (Sw.) D.Don | Melastomataceae | 8 |
| Miconia laevigata | (L.) DC. | Melastomataceae | 8 |
| Miconia mexicana | (Bonpl.) Naudin | Melastomataceae | 8 |
| Miconia octona | (Bonpl.) Judd & Majure | Melastomataceae | 8 |
| Miconia petiolaris | (Schltdl.) Michelang. | Melastomataceae | 8 |
| Miconia prasina | (Sw.) DC. | Melastomataceae | 8 |
| Miconia xalapensis | (Bonpl.) M.Gómez | Melastomataceae | 8 |
| Micranthemum umbrosum | (J.F.Gmel.) S.F.Blake | Linderniaceae | 8 |
| Microchilus querceticola | (Lindl.) D.Dietr. | Orchidaceae | 8 |
| Microgramma nitida | (J.Sm.) A.R.Sm. | Polypodiaceae | 8 |
| Microlobius foetidus | (Jacq.) M.Sousa & G.Andrade | Fabaceae | 8 |
| Mikania cordifolia | (L.f.) Willd. | Asteraceae | 8 |
| Mikania micrantha | Kunth | Asteraceae | 8 |
| Mikania scandens | (L.) Willd. | Asteraceae | 8 |
| Milla biflora | Cav. | Asparagaceae | 8 |
| Milla valliflora | J.E.Gut. & E.Solano | Asparagaceae | 8 |
| Milleria quinqueflora | L. | Asteraceae | 8 |
| Mimophytum cardiophyllum | (A.Gray ex Hemsl.) R.R.Mill ex Holstein & Weigend | Boraginaceae | 8 |
| Mimosa aculeaticarpa | Ortega | Fabaceae | 8 |
| Mimosa albida | Humb. & Bonpl. ex Willd. | Fabaceae | 8 |
| Mimosa biuncifera | Benth. | Fabaceae | 8 |
| Mimosa diplotricha | C.Wright | Fabaceae | 8 |
| Mimosa distachya | Cav. | Fabaceae | 8 |
| Mimosa pigra | L. | Fabaceae | 8 |
| Mimosa pudica | L. | Fabaceae | 8 |
| Mimosa texana | (A.Gray) Small | Fabaceae | 8 |
| Mimosa tricephala | Schltdl. & Cham. | Fabaceae | 8 |
| Mirabilis albida | (Walter) Heimerl | Nyctaginaceae | 8 |
| Mirabilis jalapa | L. | Nyctaginaceae | 8 |
| Mirabilis longiflora | L. | Nyctaginaceae | 8 |
| Mirabilis melanotricha | (Standl.) Spellenb. | Nyctaginaceae | 8 |
| Mirabilis violacea | Heimerl | Nyctaginaceae | 8 |
| Mirabilis viscosa | Cav. | Nyctaginaceae | 8 |
| Mitracarpus hirtus | (L.) DC. | Rubiaceae | 8 |
| Mitreola petiolata | (J.F.Gmel.) Torr. & A.Gray | Loganiaceae | 8 |
| Mollugo verticillata | L. | Molluginaceae | 8 |
| Monnina ciliolata | Moc. & Sessé ex DC. | Polygalaceae | 8 |
| Monnina xalapensis | Kunth | Polygalaceae | 8 |
| Monochaetum floribundum | Naudin | Melastomataceae | 8 |
| Monotropa uniflora | L. | Ericaceae | 8 |
| Monstera acuminata | K.Koch | Araceae | 8 |
| Montanoa bipinnatifida | (Kunth) K.Koch | Asteraceae | 8 |
| Montanoa frutescens | Mairet ex DC. | Asteraceae | 8 |
| Montanoa leucantha | (Lag.) S.F.Blake | Asteraceae | 8 |
| Montanoa tomentosa | Cerv. | Asteraceae | 8 |
| Montia chamissoi | (Ledeb. ex Spreng.) Greene | Montiaceae | 8 |
| Montia fontana | L. | Montiaceae | 8 |
| Moquilea platypus | Hemsl. | Chrysobalanaceae | 8 |
| Morisonia incana | (Kunth) Christenh. & Byng | Capparaceae | 8 |
| Morus celtidifolia | Kunth | Moraceae | 8 |
| Mouriri myrtilloides | Poir. | Melastomataceae | 8 |
| Moussonia deppeana | (Schltdl. & Cham.) Hanst. | Gesneriaceae | 8 |
| Mucuna argyrophylla | Standl. | Fabaceae | 8 |
| Mucuna holtonii | (Kuntze) Moldenke | Fabaceae | 8 |
| Muehlenbeckia tamnifolia | (Kunth) Meisn. | Polygonaceae | 8 |
| Muhlenbergia capillaris | (Lam.) Trin. | Poaceae | 8 |
| Muhlenbergia depauperata | Scribn. | Poaceae | 8 |
| Muhlenbergia emersleyi | Vasey | Poaceae | 8 |
| Muhlenbergia implicata | (Kunth) Trin. | Poaceae | 8 |
| Muhlenbergia longiligula | Hitchc. | Poaceae | 8 |
| Muhlenbergia microsperma | Trin. | Poaceae | 8 |
| Muhlenbergia minutissima | (Steud.) Swallen | Poaceae | 8 |
| Muhlenbergia montana | (Nutt.) Hitchc. | Poaceae | 8 |
| Muhlenbergia peruviana | (P.Beauv.) Steud. | Poaceae | 8 |
| Muhlenbergia phalaroides | (Kunth) P.M.Peterson | Poaceae | 8 |
| Muhlenbergia reverchonii | Vasey & Scribn. | Poaceae | 8 |
| Muhlenbergia richardsonis | (Trin.) Rydb. | Poaceae | 8 |
| Muhlenbergia rigida | (Kunth) Kunth | Poaceae | 8 |
| Muhlenbergia robusta | (E.Fourn.) Hitchc. | Poaceae | 8 |
| Muhlenbergia schreberi | J.F.Gmel. | Poaceae | 8 |
| Muhlenbergia spiciformis | Trin. | Poaceae | 8 |
| Muhlenbergia tricholepis | (Torr.) P.M.Peterson | Poaceae | 8 |
| Muhlenbergia utilis | (Torr.) Hitchc. | Poaceae | 8 |
| Munroa pulchella | (Kunth) Amarilla | Poaceae | 8 |
| Muntingia calabura | L. | Muntingiaceae | 8 |
| Myrcianthes fragrans | (Sw.) McVaugh | Myrtaceae | 8 |
| Myrica cerifera | L. | Myricaceae | 8 |
| Myriophyllum heterophyllum | Michx. | Haloragaceae | 8 |
| Myriophyllum hippuroides | Nutt. ex Torr. & A.Gray | Haloragaceae | 8 |
| Myriophyllum quitense | Kunth | Haloragaceae | 8 |
| Myriopteris alabamensis | (Buckley) Grusz & Windham | Pteridaceae | 8 |
| Myriopteris aurea | (Poir.) Grusz & Windham | Pteridaceae | 8 |
| Myriopteris lendigera | (Cav.) J.Sm. | Pteridaceae | 8 |
| Myriopteris microphylla | (Sw.) Grusz & Windham | Pteridaceae | 8 |
| Myriopteris myriophylla | J.Sm. | Pteridaceae | 8 |
| Myriopteris rufa | Fée | Pteridaceae | 8 |
| Myriopteris tomentosa | (Link) Fée | Pteridaceae | 8 |
| Myriopus volubilis | (L.) Small | Heliotropiaceae | 8 |
| Myrsine coriacea | (Sw.) R.Br. ex Roem. & Schult. | Primulaceae | 8 |
| Myrsine juergensenii | (Mez) Ricketson & Pipoly | Primulaceae | 8 |
| Myrtillocactus geometrizans | (Mart. ex Pfeiff.) Console | Cactaceae | 8 |
| Myrtillocactus schenckii | (J.A.Purpus) Britton & Rose | Cactaceae | 8 |
| Najas guadalupensis | (Spreng.) Magnus | Hydrocharitaceae | 8 |
| Najas marina | L. | Hydrocharitaceae | 8 |
| Nama dichotoma | (Ruiz & Pav.) Choisy | Namaceae | 8 |
| Nama hispida | A.Gray | Namaceae | 8 |
| Nama jamaicensis | L. | Namaceae | 8 |
| Nanogalactia brachystachys | (Benth.) L.P.Queiroz | Fabaceae | 8 |
| Nassella leucotricha | (Trin. & Rupr.) R.W.Pohl | Poaceae | 8 |
| Nassella tenuissima | (Trin.) Barkworth | Poaceae | 8 |
| Nassella viridula | (Trin.) Barkworth | Poaceae | 8 |
| Neea psychotrioides | Donn.Sm. | Nyctaginaceae | 8 |
| Neea tenuis | Standl. | Nyctaginaceae | 8 |
| Neltuma juliflora | (Sw.) Raf. | Fabaceae | 8 |
| Neltuma laevigata | (Humb. & Bonpl. ex Willd.) Britton & Rose | Fabaceae | 8 |
| Nemastylis tenuis | (Herb.) Benth. & Hook.f. ex S.Watson | Iridaceae | 8 |
| Neoblechnum brasiliense | (Desv.) Gasper & V.A.O.Dittrich | Blechnaceae | 8 |
| Nephroia diversifolia | (DC.) L.Lian & Wei Wang | Menispermaceae | 8 |
| Nephrolepis biserrata | (Sw.) Schott | Nephrolepidaceae | 8 |
| Neptunia plena | (L.) Benth. | Fabaceae | 8 |
| Nertera granadensis | (Mutis ex L.f.) Druce | Rubiaceae | 8 |
| Nicotiana obtusifolia | M.Martens & Galeotti | Solanaceae | 8 |
| Nicotiana plumbaginifolia | Viv. | Solanaceae | 8 |
| Nidema boothii | (Lindl.) Schltr. | Orchidaceae | 8 |
| Niphidium crassifolium | (L.) Lellinger | Polypodiaceae | 8 |
| Nissolia fruticosa | Jacq. | Fabaceae | 8 |
| Nissolia microptera | Poir. | Fabaceae | 8 |
| Nissolia pringlei | Rose | Fabaceae | 8 |
| Nolina parviflora | (Kunth) Hemsl. | Asparagaceae | 8 |
| Notholaena aschenborniana | Klotzsch | Pteridaceae | 8 |
| Notholaena brachypus | (Kunze) J.Sm. | Pteridaceae | 8 |
| Notholaena candida | (M.Martens & Galeotti) Hook. | Pteridaceae | 8 |
| Notholaena lemmonii | D.C.Eaton | Pteridaceae | 8 |
| Nothoscordum bivalve | (L.) Britton | Amaryllidaceae | 8 |
| Notopleura uliginosa | (Sw.) Bremek. | Rubiaceae | 8 |
| Notylia barkeri | Lindl. | Orchidaceae | 8 |
| Nuttallanthus canadensis | (L.) D.A.Sutton | Plantaginaceae | 8 |
| Nyctocereus serpentinus | (Lag. & Rodr.) Britton & Rose | Cactaceae | 8 |
| Nymphaea ampla | (Salisb.) DC. | Nymphaeaceae | 8 |
| Nymphaea elegans | Hook. | Nymphaeaceae | 8 |
| Nymphaea gracilis | Zucc. | Nymphaeaceae | 8 |
| Nymphaea mexicana | Zucc. | Nymphaeaceae | 8 |
| Nymphaea odorata | Aiton | Nymphaeaceae | 8 |
| Nymphaea pulchella | DC. | Nymphaeaceae | 8 |
| Nymphoides fallax | Ornduff | Menyanthaceae | 8 |
| Nymphoides humboldtiana | (Kunth) Kuntze | Menyanthaceae | 8 |
| Nyssa sylvatica | Marshall | Nyssaceae | 8 |
| Ocimum carnosum | (Spreng.) Link & Otto ex Benth. | Lamiaceae | 8 |
| Ocotea puberula | (Rich.) Nees | Lauraceae | 8 |
| Odonellia hirtiflora | (M.Martens & Galeotti) K.R.Robertson | Convolvulaceae | 8 |
| Odontonema callistachyum | (Schltdl. & Cham.) Kuntze | Acanthaceae | 8 |
| Odontonema cuspidatum | (Nees) Kuntze | Acanthaceae | 8 |
| Odontosoria schlechtendalii | (C.Presl) C.Chr. | Lindsaeaceae | 8 |
| Odontostephana reticulata | (Engelm. ex A.Gray) Morillo, Liede & Meve | Apocynaceae | 8 |
| Oenothera biennis | L. | Onagraceae | 8 |
| Oenothera curtiflora | W.L.Wagner & Hoch | Onagraceae | 8 |
| Oenothera deserticola | (Loes.) Munz | Onagraceae | 8 |
| Oenothera elata | Kunth | Onagraceae | 8 |
| Oenothera epilobiifolia | Kunth | Onagraceae | 8 |
| Oenothera flava | (A.Nelson) Garrett | Onagraceae | 8 |
| Oenothera hexandra | (Ortega) W.L.Wagner & Hoch | Onagraceae | 8 |
| Oenothera kunthiana | (Spach) Munz | Onagraceae | 8 |
| Oenothera laciniata | Hill | Onagraceae | 8 |
| Oenothera pubescens | Wild. ex Spreng. | Onagraceae | 8 |
| Oenothera rosea | Aiton | Onagraceae | 8 |
| Oenothera speciosa | Nutt. | Onagraceae | 8 |
| Oenothera suffrutescens | (Ser.) W.L.Wagner & Hoch | Onagraceae | 8 |
| Oenothera tetraptera | Cav. | Onagraceae | 8 |
| Okenia hypogaea | Schltdl. & Cham. | Nyctaginaceae | 8 |
| Oncidium graminifolium | (Lindl.) Lindl. | Orchidaceae | 8 |
| Oncidium sphacelatum | Lindl. | Orchidaceae | 8 |
| Operculina pinnatifida | (Kunth) O'Donell | Convolvulaceae | 8 |
| Operculina pteripes | (G.Don) O'Donell | Convolvulaceae | 8 |
| Ophioglossum crotalophoroides | Walter | Ophioglossaceae | 8 |
| Ophioglossum engelmannii | Prantl | Ophioglossaceae | 8 |
| Ophioglossum polyphyllum | A.Braun ex Seub. | Ophioglossaceae | 8 |
| Ophioglossum vulgatum | L. | Ophioglossaceae | 8 |
| Oplismenus compositus | (L.) P.Beauv. | Poaceae | 8 |
| Oplismenus hirtellus | (L.) P.Beauv. | Poaceae | 8 |
| Opuntia cochenillifera | (L.) Mill. | Cactaceae | 8 |
| Opuntia decumbens | Salm-Dyck | Cactaceae | 8 |
| Opuntia depressa | Rose | Cactaceae | 8 |
| Opuntia engelmannii | Salm-Dyck ex Engelm. | Cactaceae | 8 |
| Opuntia ficus-indica | (L.) Mill. | Cactaceae | 8 |
| Opuntia huajuapensis | Bravo | Cactaceae | 8 |
| Opuntia hyptiacantha | F.A.C.Weber | Cactaceae | 8 |
| Opuntia jaliscana | Bravo | Cactaceae | 8 |
| Opuntia pilifera | F.A.C.Weber | Cactaceae | 8 |
| Opuntia puberula | Pfeiff. | Cactaceae | 8 |
| Opuntia pubescens | H.L.Wendl. ex Pfeiff. | Cactaceae | 8 |
| Opuntia robusta | Pfeiff. | Cactaceae | 8 |
| Opuntia streptacantha | Lem. | Cactaceae | 8 |
| Opuntia tomentosa | Salm-Dyck | Cactaceae | 8 |
| Oreopanax capitatus | (Jacq.) Decne. & Planch. | Araliaceae | 8 |
| Oreopanax peltatus | Linden ex Regel | Araliaceae | 8 |
| Oreopanax xalapensis | (Kunth) Decne. & Planch. | Araliaceae | 8 |
| Orobanche cooperi | (A.Gray) A.Heller | Orobanchaceae | 8 |
| Orobanche dugesii | (S.Watson) Munz | Orobanchaceae | 8 |
| Orobanche ludoviciana | Nutt. | Orobanchaceae | 8 |
| Orthilia secunda | (L.) House | Ericaceae | 8 |
| Osbertia stolonifera | Greene | Asteraceae | 8 |
| Osmunda spectabilis | Willd. | Osmundaceae | 8 |
| Osmundastrum cinnamomeum | (L.) C.Presl | Osmundaceae | 8 |
| Ostrya virginiana | (Mill.) K.Koch | Betulaceae | 8 |
| Otatea acuminata | (Munro) C.E.Calderón ex Soderstr. | Poaceae | 8 |
| Oxalis alpina | (Rose) Rose ex R.Knuth | Oxalidaceae | 8 |
| Oxalis decaphylla | Kunth | Oxalidaceae | 8 |
| Oxalis frutescens | L. | Oxalidaceae | 8 |
| Oxalis latifolia | Kunth | Oxalidaceae | 8 |
| Oxalis nelsonii | (Small) R.Knuth | Oxalidaceae | 8 |
| Oxalis rhombifolia | Jacq. | Oxalidaceae | 8 |
| Oxalis tetraphylla | Cav. | Oxalidaceae | 8 |
| Oxybaphus nyctagineus | (Michx.) Sweet | Nyctaginaceae | 8 |
| Pachira aquatica | Aubl. | Malvaceae | 8 |
| Pachycereus pecten-aboriginum | (Engelm. ex S.Watson) Britton & Rose | Cactaceae | 8 |
| Pachycereus weberi | (J.M.Coult.) Backeb. | Cactaceae | 8 |
| Pachyrhizus erosus | (L.) Urb. | Fabaceae | 8 |
| Pachythamnus crassirameus | (B.L.Rob.) R.M.King & H.Rob. | Asteraceae | 8 |
| Packera coahuilensis | (Greenm.) C.Jeffrey | Asteraceae | 8 |
| Packera sanguisorbae | (DC.) C.Jeffrey | Asteraceae | 8 |
| Packera tampicana | (DC.) C.Jeffrey | Asteraceae | 8 |
| Painteria elachistophylla | (A.Gray ex S.Watson) Britton & Rose | Fabaceae | 8 |
| Palafoxia texana | DC. | Asteraceae | 8 |
| Palhinhaea cernua | (L.) Vasc. & Franco | Lycopodiaceae | 8 |
| Palicourea berteroana | (DC.) Borhidi | Rubiaceae | 8 |
| Palicourea deflexa | (DC.) Borhidi | Rubiaceae | 8 |
| Palicourea elata | (Sw.) Borhidi | Rubiaceae | 8 |
| Palicourea galeottiana | M.Martens | Rubiaceae | 8 |
| Palicourea hoffmannseggiana | (Willd. ex Schult.) Borhidi | Rubiaceae | 8 |
| Palicourea padifolia | (Willd. ex Schult.) C.M.Taylor & Lorence | Rubiaceae | 8 |
| Palicourea pubescens | (Sw.) Borhidi | Rubiaceae | 8 |
| Palicourea tetragona | (Donn.Sm.) C.M.Taylor | Rubiaceae | 8 |
| Panicum dichotomiflorum | Michx. | Poaceae | 8 |
| Panicum hallii | Vasey | Poaceae | 8 |
| Panicum hirticaule | J.Presl | Poaceae | 8 |
| Panicum virgatum | L. | Poaceae | 8 |
| Pappophorum bicolor | E.Fourn. | Poaceae | 8 |
| Pappophorum mucronulatum | Nees | Poaceae | 8 |
| Parietaria floridana | Nutt. | Urticaceae | 8 |
| Parietaria pensylvanica | Muhl. ex Willd. | Urticaceae | 8 |
| Parkinsonia aculeata | L. | Fabaceae | 8 |
| Parkinsonia praecox | (Ruiz & Pav.) Hawkins | Fabaceae | 8 |
| Parmentiera aculeata | (Kunth) Seem. | Bignoniaceae | 8 |
| Parthenium hysterophorus | L. | Asteraceae | 8 |
| Parthenium incanum | Kunth | Asteraceae | 8 |
| Parthenocissus quinquefolia | (L.) Planch. | Vitaceae | 8 |
| Paspalum acuminatum | Raddi | Poaceae | 8 |
| Paspalum conjugatum | P.J.Bergius | Poaceae | 8 |
| Paspalum denticulatum | Trin. | Poaceae | 8 |
| Paspalum distichum | L. | Poaceae | 8 |
| Paspalum langei | (E.Fourn.) Nash | Poaceae | 8 |
| Paspalum paniculatum | L. | Poaceae | 8 |
| Paspalum pilosum | Lam. | Poaceae | 8 |
| Paspalum plicatulum | Michx. | Poaceae | 8 |
| Paspalum pubiflorum | Rupr. ex E.Fourn. | Poaceae | 8 |
| Paspalum vaginatum | Sw. | Poaceae | 8 |
| Passiflora adenopoda | DC. | Passifloraceae | 8 |
| Passiflora biflora | Lam. | Passifloraceae | 8 |
| Passiflora bryonioides | Kunth | Passifloraceae | 8 |
| Passiflora capsularis | L. | Passifloraceae | 8 |
| Passiflora ciliata | Aiton | Passifloraceae | 8 |
| Passiflora exsudans | Zucc. | Passifloraceae | 8 |
| Passiflora filipes | Benth. | Passifloraceae | 8 |
| Passiflora foetida | L. | Passifloraceae | 8 |
| Passiflora hibiscifolia | Lam. | Passifloraceae | 8 |
| Passiflora mexicana | Juss. | Passifloraceae | 8 |
| Passiflora pavonis | Mast. | Passifloraceae | 8 |
| Passiflora rovirosae | Killip | Passifloraceae | 8 |
| Passiflora sexflora | Juss. | Passifloraceae | 8 |
| Passiflora sexocellata | Schltdl. | Passifloraceae | 8 |
| Passiflora suberosa | L. | Passifloraceae | 8 |
| Passiflora subpeltata | Ortega | Passifloraceae | 8 |
| Paullinia costata | Schltdl. & Cham. | Sapindaceae | 8 |
| Paullinia fuscescens | Kunth | Sapindaceae | 8 |
| Paullinia pinnata | L. | Sapindaceae | 8 |
| Pavonia chlorantha | (Kunth) Fryxell | Malvaceae | 8 |
| Pavonia oxyphylla | (DC.) Fryxell | Malvaceae | 8 |
| Pavonia schiedeana | Steud. | Malvaceae | 8 |
| Pectis prostrata | Cav. | Asteraceae | 8 |
| Pedicularis canadensis | L. | Orobanchaceae | 8 |
| Pedicularis mexicana | Zucc. ex Benth. | Orobanchaceae | 8 |
| Pediomelum pentaphyllum | (L.) Rydb. | Fabaceae | 8 |
| Pediomelum rhombifolium | (Torr. & A.Gray) Rydb. | Fabaceae | 8 |
| Pelazoneuron kunthii | (Desv.) A.R.Sm. & S.E.Fawc. | Thelypteridaceae | 8 |
| Pelazoneuron ovatum | (R.P.St.John) A.R.Sm. & S.E.Fawc. | Thelypteridaceae | 8 |
| Pelazoneuron puberulum | (Baker) A.R.Sm. & S.E.Fawc. | Thelypteridaceae | 8 |
| Pellaea atropurpurea | (L.) Link | Pteridaceae | 8 |
| Pellaea ovata | Weath. | Pteridaceae | 8 |
| Pellaea ternifolia | (Cav.) Link | Pteridaceae | 8 |
| Pennellia longifolia | (Benth.) Rollins | Brassicaceae | 8 |
| Pennellia micrantha | (A.Gray) Nieuwl. | Brassicaceae | 8 |
| Penstemon barbatus | (Cav.) Roth | Plantaginaceae | 8 |
| Penstemon campanulatus | (Cav.) Willd. | Plantaginaceae | 8 |
| Penstemon gentianoides | (Kunth) Poir. | Plantaginaceae | 8 |
| Penstemon roseus | (Cerv. ex Sweet) G.Don | Plantaginaceae | 8 |
| Peperomia ampla | (Trel.) G.Mathieu | Piperaceae | 8 |
| Peperomia bracteata | A.W.Hill | Piperaceae | 8 |
| Peperomia consoquitlana | C.DC. | Piperaceae | 8 |
| Peperomia galioides | Kunth | Piperaceae | 8 |
| Peperomia glabella | (Sw.) A.Dietr. | Piperaceae | 8 |
| Peperomia lanceolatopeltata | C.DC. | Piperaceae | 8 |
| Peperomia maculosa | (L.) Hook. | Piperaceae | 8 |
| Peperomia obtusifolia | (L.) A.Dietr. | Piperaceae | 8 |
| Peperomia pellucida | (L.) Kunth | Piperaceae | 8 |
| Peperomia quadrifolia | (L.) Kunth | Piperaceae | 8 |
| Peperomia rotundifolia | (L.) Kunth | Piperaceae | 8 |
| Peperomia san-joseana | C.DC. | Piperaceae | 8 |
| Peperomia tetraphylla | (G.Forst.) Hook. & Arn. | Piperaceae | 8 |
| Peperomia urocarpa | Fisch. & C.A.Mey. | Piperaceae | 8 |
| Pereskiopsis diguetii | (F.A.C.Weber) Britton & Rose | Cactaceae | 8 |
| Periptera punicea | (Lag.) DC. | Malvaceae | 8 |
| Persea americana | Mill. | Lauraceae | 8 |
| Persicaria acuminata | (Kunth) M.Gómez | Polygonaceae | 8 |
| Persicaria amphibia | (L.) Delarbre | Polygonaceae | 8 |
| Persicaria glabra | (Willd.) M.Gómez | Polygonaceae | 8 |
| Persicaria hydropiperoides | (Michx.) Small | Polygonaceae | 8 |
| Persicaria lapathifolia | (L.) Delarbre | Polygonaceae | 8 |
| Persicaria pensylvanica | (L.) M.Gómez | Polygonaceae | 8 |
| Persicaria punctata | Small | Polygonaceae | 8 |
| Persicaria virginiana | (L.) Gaertn. | Polygonaceae | 8 |
| Perymenium buphthalmoides | DC. | Asteraceae | 8 |
| Perymenium discolor | Schrad. | Asteraceae | 8 |
| Perymenium gymnolomoides | (Less.) DC. | Asteraceae | 8 |
| Perymenium mendezii | DC. | Asteraceae | 8 |
| Petiveria alliacea | L. | Petiveriaceae | 8 |
| Petrea volubilis | L. | Verbenaceae | 8 |
| Phacelia heterophylla | Pursh | Hydrophyllaceae | 8 |
| Phacelia platycarpa | (Cav.) Spreng. | Hydrophyllaceae | 8 |
| Phaseolus coccineus | L. | Fabaceae | 8 |
| Phaseolus lunatus | L. | Fabaceae | 8 |
| Phaseolus microcarpus | Mart. | Fabaceae | 8 |
| Phaseolus parvulus | Greene | Fabaceae | 8 |
| Phaseolus vulgaris | L. | Fabaceae | 8 |
| Phaulothamnus spinescens | A.Gray | Achatocarpaceae | 8 |
| Phemeranthus napiformis | (DC.) Ocampo | Montiaceae | 8 |
| Phenax hirtus | (Sw.) Wedd. | Urticaceae | 8 |
| Pherotrichis villosa | (Schult.) Meisn. | Apocynaceae | 8 |
| Philactis zinnioides | Schrad. | Asteraceae | 8 |
| Philadelphus mexicanus | Schltdl. | Hydrangeaceae | 8 |
| Philodendron hederaceum | (Jacq.) Schott | Araceae | 8 |
| Philodendron radiatum | Schott | Araceae | 8 |
| Philodendron sagittifolium | Liebm. | Araceae | 8 |
| Phlebodium pseudoaureum | (Cav.) Lellinger | Polypodiaceae | 8 |
| Phlegmariurus hippurideus | (Christ) B.Øllg. | Lycopodiaceae | 8 |
| Phleum alpinum | L. | Poaceae | 8 |
| Phoradendron bolleanum | (Seem.) Eichler | Santalaceae | 8 |
| Phoradendron brachystachyum | (DC.) Nutt. | Santalaceae | 8 |
| Phoradendron carneum | Urb. | Santalaceae | 8 |
| Phoradendron juniperinum | Engelm. ex A.Gray | Santalaceae | 8 |
| Phoradendron leucarpum | (Raf.) Reveal & M.C.Johnst. | Santalaceae | 8 |
| Phoradendron piperoides | (Kunth) Trel. | Santalaceae | 8 |
| Phoradendron quadrangulare | (Kunth) Griseb. | Santalaceae | 8 |
| Phragmites australis | (Cav.) Steud. | Poaceae | 8 |
| Phyla nodiflora | (L.) Greene | Verbenaceae | 8 |
| Phyllanthus caroliniensis | Walter | Phyllanthaceae | 8 |
| Phyllanthus evanescens | Brandegee | Phyllanthaceae | 8 |
| Phyllanthus grandifolius | L. | Phyllanthaceae | 8 |
| Phyllanthus niruri | L. | Phyllanthaceae | 8 |
| Physalis angulata | L. | Solanaceae | 8 |
| Physalis mollis | Nutt. | Solanaceae | 8 |
| Physalis nicandroides | Schltdl. | Solanaceae | 8 |
| Physalis patula | Mill. | Solanaceae | 8 |
| Physalis philadelphica | Lam. | Solanaceae | 8 |
| Physalis pubescens | L. | Solanaceae | 8 |
| Physalis solanacea | (Schltdl.) Axelius | Solanaceae | 8 |
| Physalis sulphurea | (Fernald) Waterf. | Solanaceae | 8 |
| Physalis viscosa | L. | Solanaceae | 8 |
| Physodium adenodes | (Goldberg) Fryxell | Malvaceae | 8 |
| Phytolacca americana | L. | Phytolaccaceae | 8 |
| Phytolacca icosandra | L. | Phytolaccaceae | 8 |
| Phytolacca octandra | L. | Phytolaccaceae | 8 |
| Phytolacca rivinoides | Kunth & C.D.Bouché | Phytolaccaceae | 8 |
| Phytolacca rugosa | A.Braun & C.D.Bouché | Phytolaccaceae | 8 |
| Picramnia antidesma | Sw. | Picramniaceae | 8 |
| Pilea microphylla | (L.) Liebm. | Urticaceae | 8 |
| Pilostyles thurberi | A.Gray | Apodanthaceae | 8 |
| Pinaropappus roseus | (Less.) Less. | Asteraceae | 8 |
| Pinaropappus spathulatus | Brandegee | Asteraceae | 8 |
| Pinguicula heterophylla | Benth. | Lentibulariaceae | 8 |
| Pinguicula moranensis | Kunth | Lentibulariaceae | 8 |
| Pinguicula oblongiloba | A.DC. | Lentibulariaceae | 8 |
| Pinguicula parvifolia | B.L.Rob. | Lentibulariaceae | 8 |
| Pinus ayacahuite | Ehrenb. ex Schltdl. | Pinaceae | 8 |
| Pinus cembroides | Zucc. | Pinaceae | 8 |
| Pinus chiapensis | (Martínez) Andresen | Pinaceae | 8 |
| Pinus devoniana | Lindl. | Pinaceae | 8 |
| Pinus greggii | Engelm. ex Parl. | Pinaceae | 8 |
| Pinus hartwegii | Lindl. | Pinaceae | 8 |
| Pinus lawsonii | Roezl ex Gordon | Pinaceae | 8 |
| Pinus leiophylla | Schiede ex Schltdl. & Cham. | Pinaceae | 8 |
| Pinus maximinoi | H.E.Moore | Pinaceae | 8 |
| Pinus montezumae | Lamb. | Pinaceae | 8 |
| Pinus oocarpa | Schiede | Pinaceae | 8 |
| Pinus patula | Schiede ex Schltdl. & Cham. | Pinaceae | 8 |
| Pinus pseudostrobus | Lindl. | Pinaceae | 8 |
| Pinus teocote | Schied. ex Schltdl. & Cham. | Pinaceae | 8 |
| Piper aduncum | L. | Piperaceae | 8 |
| Piper amalago | L. | Piperaceae | 8 |
| Piper auritum | Kunth | Piperaceae | 8 |
| Piper hispidum | Sw. | Piperaceae | 8 |
| Piper marginatum | Jacq. | Piperaceae | 8 |
| Piper umbellatum | L. | Piperaceae | 8 |
| Piptochaetium avenaceum | (L.) Parodi | Poaceae | 8 |
| Piptochaetium fimbriatum | (Kunth) Hitchc. | Poaceae | 8 |
| Piptochaetium pringlei | (Beal) Parodi | Poaceae | 8 |
| Piqueria trinervia | Cav. | Asteraceae | 8 |
| Piscidia carthagenensis | Jacq. | Fabaceae | 8 |
| Piscidia piscipula | (L.) Sarg. | Fabaceae | 8 |
| Pisonia aculeata | L. | Nyctaginaceae | 8 |
| Pisoniella arborescens | (Lag. & Rodr.) Standl. | Nyctaginaceae | 8 |
| Pistacia mexicana | Kunth | Anacardiaceae | 8 |
| Pistia stratiotes | L. | Araceae | 8 |
| Pitcairnia heterophylla | (Lindl.) Beer | Bromeliaceae | 8 |
| Pithecellobium dulce | (Roxb.) Benth. | Fabaceae | 8 |
| Pithecellobium unguis-cati | (L.) Benth. | Fabaceae | 8 |
| Pittocaulon velatum | (Greenm.) H.Rob. & Brettell | Asteraceae | 8 |
| Pityopsis graminifolia | (Michx.) Nutt. | Asteraceae | 8 |
| Pityrogramma calomelanos | (L.) Link | Pteridaceae | 8 |
| Pityrogramma trifoliata | (L.) R.M.Tryon | Pteridaceae | 8 |
| Plantago australis | Lam. | Plantaginaceae | 8 |
| Plantago nivea | Kunth | Plantaginaceae | 8 |
| Plantago tubulosa | Decne. | Plantaginaceae | 8 |
| Platanthera brevifolia | (Greene) Senghas | Orchidaceae | 8 |
| Platanus mexicana | Moric. | Platanaceae | 8 |
| Platystele stenostachya | (Rchb.f.) Garay | Orchidaceae | 8 |
| Pleopeltis angusta | Humb. & Bonpl. ex Willd. | Polypodiaceae | 8 |
| Pleopeltis crassinervata | T.Moore | Polypodiaceae | 8 |
| Pleopeltis guttata | (Maxon) E.G.Andrews & Windham | Polypodiaceae | 8 |
| Pleopeltis macrocarpa | (Bory ex Willd.) Kaulf. | Polypodiaceae | 8 |
| Pleopeltis michauxiana | (Weath.) Hickey & Sprunt | Polypodiaceae | 8 |
| Pleopeltis plebeia | (Schltdl. & Cham.) A.R.Sm. & Tejero | Polypodiaceae | 8 |
| Pleopeltis polylepis | (A.Roem. ex Kunze) T.Moore | Polypodiaceae | 8 |
| Pleradenophora lottiae | (McVaugh) A.L.Melo & Esser | Euphorbiaceae | 8 |
| Pleuranthodendron lindenii | (Turcz.) Sleumer | Salicaceae | 8 |
| Pleurothallis cardiothallis | Rchb.f. | Orchidaceae | 8 |
| Pluchea carolinensis | (Jacq.) G.Don | Asteraceae | 8 |
| Pluchea odorata | (L.) Cass. | Asteraceae | 8 |
| Pluchea salicifolia | (Mill.) S.F.Blake | Asteraceae | 8 |
| Plumbago pulchella | Boiss. | Plumbaginaceae | 8 |
| Plumbago zeylanica | L. | Plumbaginaceae | 8 |
| Plumeria rubra | L. | Apocynaceae | 8 |
| Podocarpus matudae | Lundell | Podocarpaceae | 8 |
| Polyclathra cucumerina | Bertol. | Cucurbitaceae | 8 |
| Polypodium plesiosorum | Kunze | Polypodiaceae | 8 |
| Polypogon interruptus | Kunth | Poaceae | 8 |
| Polystemma guatemalense | (Schltr.) W.D.Stevens | Apocynaceae | 8 |
| Polystemma pilosum | (Benth.) Morillo | Apocynaceae | 8 |
| Pomaria jamesii | (Torr. & A.Gray) Walp. | Fabaceae | 8 |
| Pombalia glabra | (Dowell) Paula-Souza | Violaceae | 8 |
| Pombalia verticillata | (Ortega) Paula-Souza | Violaceae | 8 |
| Pontederia sagittata | C.Presl | Pontederiaceae | 8 |
| Ponthieva racemosa | (Walter) C.Mohr | Orchidaceae | 8 |
| Populus fremontii | S.Watson | Salicaceae | 8 |
| Populus tremuloides | Michx. | Salicaceae | 8 |
| Porophyllum linaria | (Cav.) DC. | Asteraceae | 8 |
| Porophyllum punctatum | S.F.Blake | Asteraceae | 8 |
| Porophyllum ruderale | (Jacq.) Cass. | Asteraceae | 8 |
| Portulaca pilosa | L. | Portulacaceae | 8 |
| Portulaca umbraticola | Kunth | Portulacaceae | 8 |
| Potamogeton foliosus | Raf. | Potamogetonaceae | 8 |
| Potamogeton illinoensis | Morong | Potamogetonaceae | 8 |
| Potamogeton natans | L. | Potamogetonaceae | 8 |
| Potamogeton nodosus | Poir. | Potamogetonaceae | 8 |
| Potamogeton praelongus | Wulfen | Potamogetonaceae | 8 |
| Potamogeton pusillus | L. | Potamogetonaceae | 8 |
| Potentilla candicans | Humb. & Bonpl. ex Nestl. | Rosaceae | 8 |
| Potentilla rivalis | Nutt. | Rosaceae | 8 |
| Pouteria sapota | (Jacq.) H.E.Moore & Stearn | Sapotaceae | 8 |
| Pouzolzia occidentalis | (Liebm.) Wedd. | Urticaceae | 8 |
| Prescottia stachyodes | (Sw.) Lindl. | Orchidaceae | 8 |
| Prestonia mexicana | A.DC. | Apocynaceae | 8 |
| Prestonia portobellensis | (Beurl.) Woodson | Apocynaceae | 8 |
| Prionosciadium nelsonii | J.M.Coult. & Rose | Apiaceae | 8 |
| Prionosciadium thapsoides | (DC.) Mathias | Apiaceae | 8 |
| Pristimera celastroides | (Kunth) A.C.Sm. | Celastraceae | 8 |
| Priva aspera | Kunth | Verbenaceae | 8 |
| Priva grandiflora | (Ortega) Moldenke | Verbenaceae | 8 |
| Priva lappulacea | (L.) Pers. | Verbenaceae | 8 |
| Priva mexicana | (L.) Pers. | Verbenaceae | 8 |
| Proboscidea louisianica | (Mill.) Thell. | Martyniaceae | 8 |
| Proboscidea parviflora | (Wooton) Wooton & Standl. | Martyniaceae | 8 |
| Prosthechea cochleata | (L.) W.E.Higgins | Orchidaceae | 8 |
| Prosthechea michuacana | (Lex.) W.E.Higgins | Orchidaceae | 8 |
| Prosthechea ochracea | (Lindl.) W.E.Higgins | Orchidaceae | 8 |
| Prosthechea radiata | (Lindl.) W.E.Higgins | Orchidaceae | 8 |
| Prosthechea varicosa | (Bateman ex Lindl.) W.E.Higgins | Orchidaceae | 8 |
| Prosthechea vitellina | (Lindl.) W.E.Higgins | Orchidaceae | 8 |
| Prunella vulgaris | L. | Lamiaceae | 8 |
| Prunus rhamnoides | Koehne | Rosaceae | 8 |
| Prunus serotina | Ehrh. | Rosaceae | 8 |
| Prunus tetradenia | Koehne | Rosaceae | 8 |
| Psacaliopsis purpusii | (Brandegee) H.Rob. & Brettell | Asteraceae | 8 |
| Psacalium amplifolium | (DC.) H.Rob. & Brettell | Asteraceae | 8 |
| Psacalium cirsiifolium | (Zucc.) H.Rob. & Brettell | Asteraceae | 8 |
| Psacalium peltatum | Cass. | Asteraceae | 8 |
| Psacalium platylepis | (B.L.Rob. & Seaton) H.Rob. & Brettell | Asteraceae | 8 |
| Psacalium silphiifolium | (B.L.Rob. & Greenm.) H.Rob. & Brettell | Asteraceae | 8 |
| Psacalium sinuatum | (Cerv.) H.Rob. & Brettell | Asteraceae | 8 |
| Pseuderanthemum alatum | (Nees) Radlk. | Acanthaceae | 8 |
| Pseuderanthemum cuspidatum | (Nees) Radlk. | Acanthaceae | 8 |
| Pseuderanthemum praecox | (Benth.) Leonard | Acanthaceae | 8 |
| Pseudobombax ellipticum | (Kunth) Dugand | Malvaceae | 8 |
| Pseudognaphalium attenuatum | (DC.) Anderb. | Asteraceae | 8 |
| Pseudognaphalium canescens | (DC.) Anderb. | Asteraceae | 8 |
| Pseudognaphalium chartaceum | (Greenm.) Anderb. | Asteraceae | 8 |
| Pseudognaphalium roseum | (Kunth) Anderb. | Asteraceae | 8 |
| Pseudognaphalium stramineum | (Kunth) Anderb. | Asteraceae | 8 |
| Pseudogynoxys chenopodioides | (Kunth) Cabrera | Asteraceae | 8 |
| Pseudosmodingium andrieuxii | Engl. | Anacardiaceae | 8 |
| Pseudosmodingium perniciosum | (Kunth) Engl. | Anacardiaceae | 8 |
| Pseudotsuga menziesii | (Mirb.) Franco | Pinaceae | 8 |
| Psidium oligospermum | Mart. ex DC. | Myrtaceae | 8 |
| Psiguria triphylla | (Miq.) C.Jeffrey | Cucurbitaceae | 8 |
| Psilactis asteroides | A.Gray | Asteraceae | 8 |
| Psilocarphus tenellus | Nutt. | Asteraceae | 8 |
| Psilotum complanatum | Sw. | Psilotaceae | 8 |
| Psilotum nudum | (L.) P.Beauv. | Psilotaceae | 8 |
| Psittacanthus calyculatus | G.Don | Loranthaceae | 8 |
| Psittacanthus schiedeanus | (Cham. & Schltdl.) G.Don | Loranthaceae | 8 |
| Psychotria costivenia | Griseb. | Rubiaceae | 8 |
| Psychotria erythrocarpa | Schltdl. | Rubiaceae | 8 |
| Psychotria limonensis | K.Krause | Rubiaceae | 8 |
| Psychotria subsessilis | Benth. | Rubiaceae | 8 |
| Psychotria tenuifolia | Sw. | Rubiaceae | 8 |
| Ptelea trifoliata | L. | Rutaceae | 8 |
| Pteridium aquilinum | (L.) Kuhn | Dennstaedtiaceae | 8 |
| Pteridium caudatum | (L.) Maxon | Dennstaedtiaceae | 8 |
| Pteridium esculentum | (G.Forst.) Cockayne | Dennstaedtiaceae | 8 |
| Pteris longifolia | L. | Pteridaceae | 8 |
| Pterocarpus acapulcensis | Rose | Fabaceae | 8 |
| Pterospora andromedea | Nutt. | Ericaceae | 8 |
| Pyrostegia venusta | (Ker Gawl.) Miers | Bignoniaceae | 8 |
| Pyrrhopappus pauciflorus | (D.Don) DC. | Asteraceae | 8 |
| Quassia amara | L. | Simaroubaceae | 8 |
| Quercus acutifolia | Née | Fagaceae | 8 |
| Quercus calophylla | Schltdl. & Cham. | Fagaceae | 8 |
| Quercus castanea | Née | Fagaceae | 8 |
| Quercus crassifolia | Bonpl. | Fagaceae | 8 |
| Quercus deserticola | Trel. | Fagaceae | 8 |
| Quercus elliptica | Née | Fagaceae | 8 |
| Quercus germana | Schltdl. & Cham. | Fagaceae | 8 |
| Quercus glaucoides | M.Martens & Galeotti | Fagaceae | 8 |
| Quercus greggii | (A.DC.) Trel. | Fagaceae | 8 |
| Quercus insignis | M.Martens & Galeotti | Fagaceae | 8 |
| Quercus laeta | Liebm. | Fagaceae | 8 |
| Quercus lancifolia | Schltdl. & Cham. | Fagaceae | 8 |
| Quercus laurina | Bonpl. | Fagaceae | 8 |
| Quercus magnoliifolia | Née | Fagaceae | 8 |
| Quercus obtusata | Bonpl. | Fagaceae | 8 |
| Quercus oleoides | Schltdl. & Cham. | Fagaceae | 8 |
| Quercus peduncularis | Née | Fagaceae | 8 |
| Quercus polymorpha | Schltdl. & Cham. | Fagaceae | 8 |
| Quercus resinosa | Liebm. | Fagaceae | 8 |
| Quercus rugosa | Née | Fagaceae | 8 |
| Quercus sebifera | Trel. | Fagaceae | 8 |
| Randia aculeata | L. | Rubiaceae | 8 |
| Randia capitata | DC. | Rubiaceae | 8 |
| Randia echinocarpa | Moc. & Sessé ex DC. | Rubiaceae | 8 |
| Randia thurberi | S.Watson | Rubiaceae | 8 |
| Ranunculus macranthus | Scheele | Ranunculaceae | 8 |
| Ranunculus petiolaris | Kunth | Ranunculaceae | 8 |
| Ranunculus sierrae-orientalis | (L.D.Benson) G.L.Nesom | Ranunculaceae | 8 |
| Ratibida columnifera | (Nutt.) Wooton & Standl. | Asteraceae | 8 |
| Rauvolfia tetraphylla | L. | Apocynaceae | 8 |
| Reinhardtia gracilis | (H.Wendl.) Burret | Arecaceae | 8 |
| Renealmia alpinia | (Rottb.) Maas | Zingiberaceae | 8 |
| Renealmia mexicana | Klotzsch ex Petersen | Zingiberaceae | 8 |
| Restrepiella ophiocephala | (Lindl.) Garay & Dunst. | Orchidaceae | 8 |
| Rhipsalis baccifera | (Sol. ex J.S.Muell.) Stearn | Cactaceae | 8 |
| Rhizophora mangle | L. | Rhizophoraceae | 8 |
| Rhus aromatica | Aiton | Anacardiaceae | 8 |
| Rhus copallinum | L. | Anacardiaceae | 8 |
| Rhus schiedeana | Schltdl. | Anacardiaceae | 8 |
| Rhus standleyi | F.A.Barkley | Anacardiaceae | 8 |
| Rhus terebinthifolia | Schltdl. & Cham. | Anacardiaceae | 8 |
| Rhus virens | Lindh. ex A.Gray | Anacardiaceae | 8 |
| Rhynchoglossum azureum | (Schltdl.) B.L.Burtt | Gesneriaceae | 8 |
| Rhynchosia difformis | (Elliott) DC. | Fabaceae | 8 |
| Rhynchosia edulis | Griseb. | Fabaceae | 8 |
| Rhynchosia longeracemosa | M.Martens & Galeotti | Fabaceae | 8 |
| Rhynchosia minima | (L.) DC. | Fabaceae | 8 |
| Rhynchosia precatoria | (Humb. & Bonpl. ex Willd.) DC. | Fabaceae | 8 |
| Rhynchosia prostrata | Brandegee | Fabaceae | 8 |
| Rhynchosia senna | Gillies ex Hook. & Arn. | Fabaceae | 8 |
| Rhynchosida physocalyx | (A.Gray) Fryxell | Malvaceae | 8 |
| Rhynchospora colorata | (L.) H.Pfeiff. | Cyperaceae | 8 |
| Rhynchospora corymbosa | (L.) Britton | Cyperaceae | 8 |
| Rhynchospora nervosa | (Vahl) Boeckeler | Cyperaceae | 8 |
| Rhynchostele cervantesii | (Lex.) Soto Arenas & Salazar | Orchidaceae | 8 |
| Ribes ciliatum | Humb. & Bonpl. ex Schult. | Grossulariaceae | 8 |
| Richardia scabra | L. | Rubiaceae | 8 |
| Richardia tricocca | (Torr. & A.Gray) Standl. | Rubiaceae | 8 |
| Rivina humilis | L. | Petiveriaceae | 8 |
| Roldana angulifolia | (DC.) H.Rob. & Brettell | Asteraceae | 8 |
| Roldana barba-johannis | (DC.) H.Rob. & Brettell | Asteraceae | 8 |
| Roldana candicans | (Née) Villaseñor, S.Valencia & Coombes | Asteraceae | 8 |
| Roldana heracleifolia | (Hemsl.) H.Rob. & Brettell | Asteraceae | 8 |
| Roldana lobata | La Llave | Asteraceae | 8 |
| Roldana oaxacana | (Hemsl.) H.Rob. & Brettell | Asteraceae | 8 |
| Rotala ramosior | (L.) Koehne | Lythraceae | 8 |
| Rubus adenotrichos | Schltdl. | Rosaceae | 8 |
| Rubus coriifolius | Liebm. | Rosaceae | 8 |
| Rubus flagellaris | Willd. | Rosaceae | 8 |
| Rubus glaucus | Benth. | Rosaceae | 8 |
| Rubus trilobus | Ser. | Rosaceae | 8 |
| Ruehssia gualanensis | (Donn.Sm.) L.O.Alvarado | Apocynaceae | 8 |
| Ruehssia mexicana | (Decne.) L.O.Alvarado | Apocynaceae | 8 |
| Ruellia blechum | L. | Acanthaceae | 8 |
| Ruellia ciliatiflora | Hook. | Acanthaceae | 8 |
| Ruellia inundata | Kunth | Acanthaceae | 8 |
| Ruellia jussieuoides | Schltdl. & Cham. | Acanthaceae | 8 |
| Ruellia lactea | Cav. | Acanthaceae | 8 |
| Ruellia longepetiolata | (Oerst.) Hemsl. | Acanthaceae | 8 |
| Ruellia simplex | C.Wright | Acanthaceae | 8 |
| Rumfordia floribunda | DC. | Asteraceae | 8 |
| Ruppia maritima | L. | Ruppiaceae | 8 |
| Russelia equisetiformis | Schltdl. & Cham. | Plantaginaceae | 8 |
| Russelia sarmentosa | Jacq. | Plantaginaceae | 8 |
| Russelia verticillata | Kunth | Plantaginaceae | 8 |
| Sabazia multiradiata | (Seaton) Longpre | Asteraceae | 8 |
| Sabdariffa furcellata | (Desr.) M.M.Hanes & R.L.Barrett | Malvaceae | 8 |
| Sacoila lanceolata | (Aubl.) Garay | Orchidaceae | 8 |
| Sagina saginoides | (L.) H.Karst. | Caryophyllaceae | 8 |
| Sagittaria latifolia | Willd. | Alismataceae | 8 |
| Sagittaria longiloba | Engelm. ex J.G.Sm. | Alismataceae | 8 |
| Salix bonplandiana | Kunth | Salicaceae | 8 |
| Salix humboldtiana | Willd. | Salicaceae | 8 |
| Salix lasiolepis | Benth. | Salicaceae | 8 |
| Salix nigra | Marshall | Salicaceae | 8 |
| Salix taxifolia | Kunth | Salicaceae | 8 |
| Salpianthus arenarius | Bonpl. | Nyctaginaceae | 8 |
| Salpianthus purpurascens | (Cav. ex Lag.) Hook. & Arn. | Nyctaginaceae | 8 |
| Salvia axillaris | Moc. & Sessé ex Benth. | Lamiaceae | 8 |
| Salvia carnea | Kunth | Lamiaceae | 8 |
| Salvia chamaedryoides | Cav. | Lamiaceae | 8 |
| Salvia cinnabarina | M.Martens & Galeotti | Lamiaceae | 8 |
| Salvia circinnata | Cav. | Lamiaceae | 8 |
| Salvia coccinea | Buc'hoz ex Etl. | Lamiaceae | 8 |
| Salvia concolor | Lamb. ex Benth. | Lamiaceae | 8 |
| Salvia connivens | Epling | Lamiaceae | 8 |
| Salvia curviflora | Benth. | Lamiaceae | 8 |
| Salvia elegans | Vahl | Lamiaceae | 8 |
| Salvia helianthemifolia | Benth. | Lamiaceae | 8 |
| Salvia hirsuta | Jacq. | Lamiaceae | 8 |
| Salvia hispanica | L. | Lamiaceae | 8 |
| Salvia involucrata | Cav. | Lamiaceae | 8 |
| Salvia iodantha | Fernald | Lamiaceae | 8 |
| Salvia karwinskii | Benth. | Lamiaceae | 8 |
| Salvia laevis | Benth. | Lamiaceae | 8 |
| Salvia lasiantha | Benth. | Lamiaceae | 8 |
| Salvia lasiocephala | Hook. & Arn. | Lamiaceae | 8 |
| Salvia lavanduloides | Kunth | Lamiaceae | 8 |
| Salvia leptostachys | Benth. | Lamiaceae | 8 |
| Salvia leucantha | Cav. | Lamiaceae | 8 |
| Salvia longispicata | M.Martens & Galeotti | Lamiaceae | 8 |
| Salvia longistyla | Benth. | Lamiaceae | 8 |
| Salvia melissodora | Lag. | Lamiaceae | 8 |
| Salvia mexicana | L. | Lamiaceae | 8 |
| Salvia microphylla | Kunth | Lamiaceae | 8 |
| Salvia misella | Kunth | Lamiaceae | 8 |
| Salvia mocinoi | Benth. | Lamiaceae | 8 |
| Salvia nana | Kunth | Lamiaceae | 8 |
| Salvia occidentalis | Sw. | Lamiaceae | 8 |
| Salvia oreopola | Fernald | Lamiaceae | 8 |
| Salvia patens | Cav. | Lamiaceae | 8 |
| Salvia polystachia | Cav. | Lamiaceae | 8 |
| Salvia prunelloides | Kunth | Lamiaceae | 8 |
| Salvia purpurea | Cav. | Lamiaceae | 8 |
| Salvia pusilla | Fernald | Lamiaceae | 8 |
| Salvia reflexa | Hornem. | Lamiaceae | 8 |
| Salvia regla | Cav. | Lamiaceae | 8 |
| Salvia reptans | Jacq. | Lamiaceae | 8 |
| Salvia sessei | Benth. | Lamiaceae | 8 |
| Salvia setulosa | Fernald | Lamiaceae | 8 |
| Salvia thymoides | Benth. | Lamiaceae | 8 |
| Salvia tiliifolia | Vahl | Lamiaceae | 8 |
| Salvia tubifera | Cav. | Lamiaceae | 8 |
| Salvia veronicifolia | A.Gray | Lamiaceae | 8 |
| Salvia vitifolia | Benth. | Lamiaceae | 8 |
| Salvia xalapensis | Benth. | Lamiaceae | 8 |
| Sambucus canadensis | L. | Viburnaceae | 8 |
| Sambucus peruviana | Kunth | Viburnaceae | 8 |
| Samolus ebracteatus | Kunth | Primulaceae | 8 |
| Samolus parviflorus | Raf. | Primulaceae | 8 |
| Sanicula liberta | Cham. & Schltdl. | Apiaceae | 8 |
| Sanvitalia ocymoides | DC. | Asteraceae | 8 |
| Sanvitalia procumbens | Lam. | Asteraceae | 8 |
| Sapindus saponaria | L. | Sapindaceae | 8 |
| Sapium lateriflorum | Hemsl. | Euphorbiaceae | 8 |
| Sarcoglottis sceptrodes | (Rchb.f.) Schltr. | Orchidaceae | 8 |
| Sarcoglottis schaffneri | (Rchb.f.) Ames | Orchidaceae | 8 |
| Sarcomphalus amole | (Sessé & Moc.) Hauenschild | Rhamnaceae | 8 |
| Saurauia scabrida | Hemsl. | Actinidiaceae | 8 |
| Saurauia yasicae | Loes. | Actinidiaceae | 8 |
| Sauvagesia erecta | L. | Ochnaceae | 8 |
| Scaevola plumieri | (L.) Vahl | Goodeniaceae | 8 |
| Scaphyglottis fasciculata | Hook. | Orchidaceae | 8 |
| Schiedeella affinis | (C.Schweinf.) Salazar | Orchidaceae | 8 |
| Schistocarpha eupatorioides | (Fenzl) Kuntze | Asteraceae | 8 |
| Schizachyrium microstachyum | (Desv.) Roseng., B.R.Arrill. & Izag. | Poaceae | 8 |
| Schizachyrium sanguineum | (Retz.) Alston | Poaceae | 8 |
| Schizachyrium scoparium | (Michx.) Nash | Poaceae | 8 |
| Schizocarpum palmeri | Cogn. & Rose | Cucurbitaceae | 8 |
| Schizocarpum parviflorum | B.L.Rob. & Greenm. | Cucurbitaceae | 8 |
| Schkuhria pinnata | (Lam.) Kuntze ex Thell. | Asteraceae | 8 |
| Schoenoplectus americanus | (Pers.) Volkart | Cyperaceae | 8 |
| Schoenoplectus californicus | (C.A.Mey.) Soják | Cyperaceae | 8 |
| Schoenoplectus tabernaemontani | (C.C.Gmel.) Palla | Cyperaceae | 8 |
| Scleria ciliata | Michx. | Cyperaceae | 8 |
| Scleria muehlenbergii | Steud. | Cyperaceae | 8 |
| Sclerocarpus divaricatus | (Benth.) Benth. & Hook.f. ex Hemsl. | Asteraceae | 8 |
| Sclerocarpus uniserialis | (Hook.) Benth. & Hook.f. ex Hemsl. | Asteraceae | 8 |
| Scleropogon brevifolius | Phil. | Poaceae | 8 |
| Scoparia dulcis | L. | Plantaginaceae | 8 |
| Scoparia montevidensis | (Spreng.) R.E.Fr. | Plantaginaceae | 8 |
| Scutellaria dumetorum | Schltdl. | Lamiaceae | 8 |
| Scutellaria potosina | Brandegee | Lamiaceae | 8 |
| Scutellaria seleriana | Loes. | Lamiaceae | 8 |
| Sebastiania glandulosa | (Sw.) Müll.Arg. | Euphorbiaceae | 8 |
| Sedum dendroideum | Moc. & Sessé ex DC. | Crassulaceae | 8 |
| Sedum ebracteatum | Moc. & Sessé ex DC. | Crassulaceae | 8 |
| Sedum goldmanii | (Rose) Moran | Crassulaceae | 8 |
| Sedum greggii | Hemsl. | Crassulaceae | 8 |
| Sedum jaliscanum | S.Watson | Crassulaceae | 8 |
| Sedum jurgensenii | (Hemsl.) Moran | Crassulaceae | 8 |
| Sedum mexicanum | Britton | Crassulaceae | 8 |
| Sedum moranense | Kunth | Crassulaceae | 8 |
| Sedum oaxacanum | Rose | Crassulaceae | 8 |
| Sedum oteroi | Moran | Crassulaceae | 8 |
| Sedum oxypetalum | Kunth | Crassulaceae | 8 |
| Sedum praealtum | A.DC. | Crassulaceae | 8 |
| Selaginella apoda | Spring | Selaginellaceae | 8 |
| Selaginella lepidophylla | (Hook. & Grev.) Spring | Selaginellaceae | 8 |
| Selaginella pallescens | (C.Presl) Spring | Selaginellaceae | 8 |
| Selaginella peruviana | Hieron. | Selaginellaceae | 8 |
| Selaginella rupincola | Underw. | Selaginellaceae | 8 |
| Selaginella sellowii | Hieron. | Selaginellaceae | 8 |
| Selaginella wrightii | Hieron. | Selaginellaceae | 8 |
| Selenicereus ocamponis | (Salm-Dyck) D.R.Hunt | Cactaceae | 8 |
| Selenicereus spinulosus | (DC.) Britton & Rose | Cactaceae | 8 |
| Selenicereus undatus | (Haw.) D.R.Hunt | Cactaceae | 8 |
| Selenicereus vagans | (K.Brandegee) Britton & Rose | Cactaceae | 8 |
| Semialarium mexicanum | (Miers) Mennega | Celastraceae | 8 |
| Senecio andrieuxii | DC. | Asteraceae | 8 |
| Senecio callosus | Sch.Bip. | Asteraceae | 8 |
| Senecio cinerarioides | Kunth | Asteraceae | 8 |
| Senecio conzattii | Greenm. | Asteraceae | 8 |
| Senecio flaccidus | Less. | Asteraceae | 8 |
| Senecio mairetianus | DC. | Asteraceae | 8 |
| Senecio praecox | DC. | Asteraceae | 8 |
| Senecio sessilifolius | Hemsl. | Asteraceae | 8 |
| Senegalia berlandieri | (Benth.) Britton & Rose | Fabaceae | 8 |
| Senna atomaria | (L.) H.S.Irwin & Barneby | Fabaceae | 8 |
| Senna crotalarioides | (Kunth) H.S.Irwin & Barneby | Fabaceae | 8 |
| Senna hirsuta | (L.) H.S.Irwin & Barneby | Fabaceae | 8 |
| Senna holwayana | (Rose) H.S.Irwin & Barneby | Fabaceae | 8 |
| Senna multiglandulosa | (Jacq.) H.S.Irwin & Barneby | Fabaceae | 8 |
| Senna multijuga | (Rich.) H.S.Irwin & Barneby | Fabaceae | 8 |
| Senna obtusifolia | (L.) H.S.Irwin & Barneby | Fabaceae | 8 |
| Senna occidentalis | (L.) Link | Fabaceae | 8 |
| Senna pallida | (Vahl) H.S.Irwin & Barneby | Fabaceae | 8 |
| Senna pendula | (Humb. & Bonpl. ex Willd.) H.S.Irwin & Barneby | Fabaceae | 8 |
| Senna septemtrionalis | (Viv.) H.S.Irwin & Barneby | Fabaceae | 8 |
| Senna skinneri | (Benth.) H.S.Irwin & Barneby | Fabaceae | 8 |
| Senna uniflora | (Mill.) H.S.Irwin & Barneby | Fabaceae | 8 |
| Senna wislizeni | (A.Gray) H.S.Irwin & Barneby | Fabaceae | 8 |
| Serjania mexicana | Willd. | Sapindaceae | 8 |
| Serjania racemosa | Schum. | Sapindaceae | 8 |
| Serjania triquetra | Radlk. | Sapindaceae | 8 |
| Serpocaulon triseriale | (Sw.) A.R.Sm. | Polypodiaceae | 8 |
| Sesbania herbacea | (Mill.) McVaugh | Fabaceae | 8 |
| Sesuvium portulacastrum | (L.) L. | Aizoaceae | 8 |
| Setaria grisebachii | E.Fourn. | Poaceae | 8 |
| Setaria leucopila | (Scribn. & Merr.) K.Schum. | Poaceae | 8 |
| Setaria liebmannii | E.Fourn. | Poaceae | 8 |
| Setaria parviflora | (Poir.) Kerguélen | Poaceae | 8 |
| Setaria scheelei | (Steud.) Hitchc. | Poaceae | 8 |
| Seymeria decurva | Benth. | Orobanchaceae | 8 |
| Sibbaldia procumbens | L. | Rosaceae | 8 |
| Sibthorpia repens | (Mutis ex L.) Kuntze | Plantaginaceae | 8 |
| Sicyos edulis | Jacq. | Cucurbitaceae | 8 |
| Sicyos laciniatus | L. | Cucurbitaceae | 8 |
| Sicyos microphyllus | Kunth | Cucurbitaceae | 8 |
| Sida acuta | Burm.f. | Malvaceae | 8 |
| Sida ciliaris | L. | Malvaceae | 8 |
| Sida cordifolia | L. | Malvaceae | 8 |
| Sida elliottii | Torr. & A.Gray | Malvaceae | 8 |
| Sida haenkeana | C.Presl | Malvaceae | 8 |
| Sida linearis | Cav. | Malvaceae | 8 |
| Sida linifolia | Cav. | Malvaceae | 8 |
| Sida spinosa | L. | Malvaceae | 8 |
| Sidastrum tehuacanum | (Brandegee) Fryxell | Malvaceae | 8 |
| Sideroxylon capiri | (A.DC.) Pittier | Sapotaceae | 8 |
| Sideroxylon persimile | (Hemsl.) T.D.Penn. | Sapotaceae | 8 |
| Sideroxylon salicifolium | (L.) Lam. | Sapotaceae | 8 |
| Sigesbeckia jorullensis | Kunth | Asteraceae | 8 |
| Silene laciniata | Cav. | Caryophyllaceae | 8 |
| Simarouba amara | Aubl. | Simaroubaceae | 8 |
| Simarouba glauca | DC. | Simaroubaceae | 8 |
| Simsia amplexicaulis | (Cav.) Pers. | Asteraceae | 8 |
| Simsia foetida | (Cav.) S.F.Blake | Asteraceae | 8 |
| Simsia sanguinea | A.Gray | Asteraceae | 8 |
| Sinclairia andrieuxii | (DC.) H.Rob. & Brettell | Asteraceae | 8 |
| Sinclairia angustissima | (A.Gray) B.L.Turner | Asteraceae | 8 |
| Sinclairia discolor | Hook. & Arn. | Asteraceae | 8 |
| Siparuna thecaphora | (Poepp. & Endl.) A.DC. | Siparunaceae | 8 |
| Sisyrinchium angustissimum | (B.L.Rob. & Greenm.) Greenm. & C.H.Thomps. | Iridaceae | 8 |
| Sisyrinchium micranthum | Cav. | Iridaceae | 8 |
| Sisyrinchium scabrum | Schltdl. & Cham. | Iridaceae | 8 |
| Sisyrinchium tenuifolium | Humb. & Bonpl. ex Willd. | Iridaceae | 8 |
| Smallanthus maculatus | (Cav.) H.Rob. | Asteraceae | 8 |
| Smilax bona-nox | L. | Smilacaceae | 8 |
| Smilax glauca | Walter | Smilacaceae | 8 |
| Smilax moranensis | M.Martens & Galeotti | Smilacaceae | 8 |
| Smilax spinosa | Mill. | Smilacaceae | 8 |
| Smilax subpubescens | A.DC. | Smilacaceae | 8 |
| Sobralia macrantha | Lindl. | Orchidaceae | 8 |
| Solandra maxima | (Sessé & Moc.) P.S.Green | Solanaceae | 8 |
| Solanum acerifolium | Dunal | Solanaceae | 8 |
| Solanum aligerum | Schltdl. | Solanaceae | 8 |
| Solanum americanum | Mill. | Solanaceae | 8 |
| Solanum aphyodendron | S.Knapp | Solanaceae | 8 |
| Solanum appendiculatum | Dunal | Solanaceae | 8 |
| Solanum candidum | Lindl. | Solanaceae | 8 |
| Solanum chrysotrichum | Schltdl. | Solanaceae | 8 |
| Solanum deflexum | Greenm. | Solanaceae | 8 |
| Solanum demissum | Lindl. | Solanaceae | 8 |
| Solanum donianum | Walp. | Solanaceae | 8 |
| Solanum douglasii | Dunal | Solanaceae | 8 |
| Solanum elaeagnifolium | Cav. | Solanaceae | 8 |
| Solanum erianthum | D.Don | Solanaceae | 8 |
| Solanum grayi | Rose | Solanaceae | 8 |
| Solanum heterodoxum | Dunal | Solanaceae | 8 |
| Solanum houstonii | Martyn | Solanaceae | 8 |
| Solanum jamaicense | Mill. | Solanaceae | 8 |
| Solanum lanceolatum | Cav. | Solanaceae | 8 |
| Solanum mitlense | Dunal | Solanaceae | 8 |
| Solanum nigrescens | M.Martens & Galeotti | Solanaceae | 8 |
| Solanum pubigerum | Dunal | Solanaceae | 8 |
| Solanum rostratum | Dunal | Solanaceae | 8 |
| Solanum schlechtendalianum | Walp. | Solanaceae | 8 |
| Solanum stoloniferum | Schltdl. | Solanaceae | 8 |
| Solanum subinerme | Jacq. | Solanaceae | 8 |
| Solanum torvum | Sw. | Solanaceae | 8 |
| Solanum umbellatum | Mill. | Solanaceae | 8 |
| Solanum volubile | Sw. | Solanaceae | 8 |
| Solanum wendlandii | Hook.f. | Solanaceae | 8 |
| Solidago altissima | L. | Asteraceae | 8 |
| Solidago simplex | Kunth | Asteraceae | 8 |
| Solidago velutina | DC. | Asteraceae | 8 |
| Sorghastrum nutans | (L.) Nash | Poaceae | 8 |
| Sotoa confusa | (Garay) Salazar | Orchidaceae | 8 |
| Spananthe paniculata | Jacq. | Apiaceae | 8 |
| Sparganium eurycarpum | Engelm. | Typhaceae | 8 |
| Spathiphyllum cochlearispathum | (Liebm.) Engl. | Araceae | 8 |
| Spermacoce confusa | Rendle | Rubiaceae | 8 |
| Spermacoce exilis | (L.O.Williams) C.D.Adams ex W.C.Burger & C.M.Taylor | Rubiaceae | 8 |
| Spermacoce prostrata | Aubl. | Rubiaceae | 8 |
| Spermacoce remota | Lam. | Rubiaceae | 8 |
| Spermacoce verticillata | L. | Rubiaceae | 8 |
| Sphaeralcea hastulata | A.Gray | Malvaceae | 8 |
| Sphenopholis obtusata | (Michx.) Scribn. | Poaceae | 8 |
| Spigelia humboldtiana | Cham. & Schltdl. | Loganiaceae | 8 |
| Spigelia scabrella | Benth. | Loganiaceae | 8 |
| Spirodela polyrhiza | (L.) Schleid. | Araceae | 8 |
| Spondias mombin | L. | Anacardiaceae | 8 |
| Spondias purpurea | L. | Anacardiaceae | 8 |
| Sporobolus indicus | (L.) R.Br. | Poaceae | 8 |
| Sporobolus pyramidatus | (Lam.) Hitchc. | Poaceae | 8 |
| Sporobolus wrightii | Scribn. | Poaceae | 8 |
| Stachys agraria | Schltdl. & Cham. | Lamiaceae | 8 |
| Stachys coccinea | Ortega | Lamiaceae | 8 |
| Stachytarpheta acuminata | DC. ex Schauer | Verbenaceae | 8 |
| Stachytarpheta frantzii | Pol. | Verbenaceae | 8 |
| Stachytarpheta jamaicensis | (L.) Vahl | Verbenaceae | 8 |
| Stachytarpheta mutabilis | (Jacq.) Vahl | Verbenaceae | 8 |
| Stapfochloa ciliata | (Sw.) P.M.Peterson | Poaceae | 8 |
| Stegnosperma halimifolium | Benth. | Stegnospermataceae | 8 |
| Stelis emarginata | (Lindl.) Soto Arenas & Solano | Orchidaceae | 8 |
| Stelis pachyglossa | (Lindl.) Pridgeon & M.W.Chase | Orchidaceae | 8 |
| Stellaria cuspidata | D.F.K.Schltdl. | Caryophyllaceae | 8 |
| Stemodia durantifolia | (L.) Sw. | Plantaginaceae | 8 |
| Stemodia macrantha | B.L.Rob. | Plantaginaceae | 8 |
| Stenandrium dulce | (Cav.) Nees | Acanthaceae | 8 |
| Stenandrium verticillatum | Brandegee | Acanthaceae | 8 |
| Stenocactus coptonogonus | A.Berger | Cactaceae | 8 |
| Stenocactus crispatus | (DC.) A.Berger | Cactaceae | 8 |
| Stenocactus phyllacanthus | (Mart) A.Berger | Cactaceae | 8 |
| Stenocereus beneckei | (Ehrenb.) A.Berger & Buxb. | Cactaceae | 8 |
| Stenocereus griseus | (Haw.) Buxb. | Cactaceae | 8 |
| Stenocereus pruinosus | (Otto ex Pfeiff.) Buxb. | Cactaceae | 8 |
| Stenocereus queretaroensis | (F.A.C.Weber) Buxb. | Cactaceae | 8 |
| Stenocereus stellatus | (Pfeiff.) Riccob. | Cactaceae | 8 |
| Stenocereus treleasei | (Rose) Backeb. | Cactaceae | 8 |
| Stenostephanus haematodes | (Schltdl.) T.F.Daniel | Acanthaceae | 8 |
| Stevia elatior | Kunth | Asteraceae | 8 |
| Stevia ephemera | Grashoff | Asteraceae | 8 |
| Stevia lucida | Lag. | Asteraceae | 8 |
| Stevia ovata | Willd. | Asteraceae | 8 |
| Stevia salicifolia | Cav. | Asteraceae | 8 |
| Stevia serrata | Cav. | Asteraceae | 8 |
| Stevia subpubescens | Lag. | Asteraceae | 8 |
| Stevia tomentosa | Kunth | Asteraceae | 8 |
| Stevia triflora | DC. | Asteraceae | 8 |
| Stevia viscida | Kunth | Asteraceae | 8 |
| Stuckenia pectinata | (L.) Börner | Potamogetonaceae | 8 |
| Stylosanthes guianensis | (Aubl.) Sw. | Fabaceae | 8 |
| Stylosanthes viscosa | (L.) Sw. | Fabaceae | 8 |
| Styrax argenteus | C.Presl | Styracaceae | 8 |
| Styrax glabrescens | Benth. | Styracaceae | 8 |
| Suaeda nigra | (Raf.) J.F.Macbr. | Chenopodiaceae | 8 |
| Swietenia humilis | Zucc. | Meliaceae | 8 |
| Swietenia macrophylla | King | Meliaceae | 8 |
| Symphyotrichum bullatum | (Klatt) G.L.Nesom | Asteraceae | 8 |
| Symphyotrichum praealtum | (Poir.) G.L.Nesom | Asteraceae | 8 |
| Symphyotrichum trilineatum | (Sch.Bip. ex Klatt) G.L.Nesom | Asteraceae | 8 |
| Symplocos coccinea | Bonpl. | Symplocaceae | 8 |
| Syngonium angustatum | Schott | Araceae | 8 |
| Syngonium neglectum | Schott | Araceae | 8 |
| Syngonium podophyllum | Schott | Araceae | 8 |
| Tabebuia rosea | (Bertol.) DC. | Bignoniaceae | 8 |
| Tabernaemontana alba | Mill. | Apocynaceae | 8 |
| Tabernaemontana amygdalifolia | Jacq. | Apocynaceae | 8 |
| Tabernaemontana donnell-smithii | Rose | Apocynaceae | 8 |
| Tabernaemontana glabra | (Benth.) A.O.Simões & M.E.Endress | Apocynaceae | 8 |
| Tabernaemontana litoralis | Kunth | Apocynaceae | 8 |
| Tabernaemontana tomentosa | (Greenm.) A.O.Simões & M.E.Endress | Apocynaceae | 8 |
| Tagetes erecta | L. | Asteraceae | 8 |
| Tagetes filifolia | Lag. | Asteraceae | 8 |
| Tagetes foetidissima | hort. ex DC. | Asteraceae | 8 |
| Tagetes lucida | Cav. | Asteraceae | 8 |
| Tagetes lunulata | Ortega | Asteraceae | 8 |
| Tagetes micrantha | Cav. | Asteraceae | 8 |
| Tagetes subulata | Cerv. | Asteraceae | 8 |
| Tagetes tenuifolia | Cav. | Asteraceae | 8 |
| Talinopsis frutescens | A.Gray | Anacampserotaceae | 8 |
| Talinum fruticosum | (L.) Juss. | Talinaceae | 8 |
| Talinum paniculatum | (Jacq.) Gaertn. | Talinaceae | 8 |
| Tara cacalaco | (Bonpl.) Molinari & Sánchez Och. | Fabaceae | 8 |
| Tarenaya aculeata | (L.) Soares Neto & Roalson | Cleomaceae | 8 |
| Taxodium distichum | (L.) Rich. | Cupressaceae | 8 |
| Tecoma stans | (L.) Juss. | Bignoniaceae | 8 |
| Tectaria heracleifolia | (Willd.) Underw. | Tectariaceae | 8 |
| Telanthophora grandifolia | (Less.) H.Rob. & Brettell | Asteraceae | 8 |
| Tephrosia cinerea | (L.) Pers. | Fabaceae | 8 |
| Terminalia buceras | (L.) C.Wright | Combretaceae | 8 |
| Ternstroemia tepezapote | Schltdl. & Cham. | Pentaphylacaceae | 8 |
| Tetraclea coulteri | A.Gray | Lamiaceae | 8 |
| Tetramerium nervosum | Nees | Acanthaceae | 8 |
| Tetrapterys mexicana | Hook. & Arn. | Malpighiaceae | 8 |
| Tetrapterys schiedeana | Schltdl. & Cham. | Malpighiaceae | 8 |
| Teucrium cubense | Jacq. | Lamiaceae | 8 |
| Teucrium vesicarium | Mill. | Lamiaceae | 8 |
| Thalia geniculata | L. | Marantaceae | 8 |
| Thalictrum fendleri | Engelm. ex A.Gray | Ranunculaceae | 8 |
| Thelypodium wrightii | A.Gray | Brassicaceae | 8 |
| Thelypteris palustris | Schott | Thelypteridaceae | 8 |
| Thevetia ahouai | A.DC. | Apocynaceae | 8 |
| Thompsonella minutiflora | (Rose) Britton & Rose | Crassulaceae | 8 |
| Thouinia acuminata | S.Watson | Sapindaceae | 8 |
| Thouinidium decandrum | (Bonpl.) Radlk. | Sapindaceae | 8 |
| Thymophylla aurantiaca | Rydb. | Asteraceae | 8 |
| Thymophylla pentachaeta | (DC.) Small | Asteraceae | 8 |
| Thymophylla setifolia | Lag. | Asteraceae | 8 |
| Tigridia augusta | Drapiez | Iridaceae | 8 |
| Tigridia longispatha | (Herb.) Goldblatt | Iridaceae | 8 |
| Tigridia multiflora | (Baker) Ravenna | Iridaceae | 8 |
| Tigridia pavonia | (L.f.) Redouté | Iridaceae | 8 |
| Tilia americana | L. | Malvaceae | 8 |
| Tillandsia achyrostachys | É.Morren ex Baker | Bromeliaceae | 8 |
| Tillandsia atroviridipetala | Matuda | Bromeliaceae | 8 |
| Tillandsia bourgaei | Baker | Bromeliaceae | 8 |
| Tillandsia brachycaulos | Schltdl. | Bromeliaceae | 8 |
| Tillandsia butzii | Mez | Bromeliaceae | 8 |
| Tillandsia caput-medusae | É.Morren | Bromeliaceae | 8 |
| Tillandsia circinnatioides | Matuda | Bromeliaceae | 8 |
| Tillandsia deppeana | Steud. | Bromeliaceae | 8 |
| Tillandsia erubescens | Schltdl. | Bromeliaceae | 8 |
| Tillandsia fasciculata | Sw. | Bromeliaceae | 8 |
| Tillandsia heterophylla | É.Morren | Bromeliaceae | 8 |
| Tillandsia ionantha | Planch. | Bromeliaceae | 8 |
| Tillandsia juncea | (Ruiz & Pav.) Poir. | Bromeliaceae | 8 |
| Tillandsia leiboldiana | Schltdl. | Bromeliaceae | 8 |
| Tillandsia limbata | Schltdl. | Bromeliaceae | 8 |
| Tillandsia lucida | É.Morren ex Baker | Bromeliaceae | 8 |
| Tillandsia makoyana | Baker | Bromeliaceae | 8 |
| Tillandsia multicaulis | Steud. | Bromeliaceae | 8 |
| Tillandsia paucifolia | Baker | Bromeliaceae | 8 |
| Tillandsia prodigiosa | (Lem.) Baker | Bromeliaceae | 8 |
| Tillandsia punctulata | Schltdl. & Cham. | Bromeliaceae | 8 |
| Tillandsia recurvata | (L.) L. | Bromeliaceae | 8 |
| Tillandsia rodrigueziana | Mez | Bromeliaceae | 8 |
| Tillandsia schiedeana | Steud. | Bromeliaceae | 8 |
| Tillandsia streptophylla | Scheidw. | Bromeliaceae | 8 |
| Tillandsia tehuacana | I.Ramírez & Carnevali | Bromeliaceae | 8 |
| Tillandsia usneoides | (L.) L. | Bromeliaceae | 8 |
| Tillandsia variabilis | Schltdl. | Bromeliaceae | 8 |
| Tillandsia violacea | Baker | Bromeliaceae | 8 |
| Tinantia anomala | C.B.Clarke | Commelinaceae | 8 |
| Tinantia erecta | (Jacq.) Fenzl | Commelinaceae | 8 |
| Tinantia standleyi | Steyerm. | Commelinaceae | 8 |
| Tiquilia canescens | (DC.) A.T.Richardson | Ehretiaceae | 8 |
| Tithonia diversifolia | (Hemsl.) A.Gray | Asteraceae | 8 |
| Tithonia longiradiata | (Bertol.) S.F.Blake | Asteraceae | 8 |
| Tithonia rotundifolia | S.F.Blake | Asteraceae | 8 |
| Tithonia tubaeformis | (Jacq.) Cass. | Asteraceae | 8 |
| Torenia crustacea | (L.) Cham. & Schltdl. | Linderniaceae | 8 |
| Toxicodendron radicans | (L.) Kuntze | Anacardiaceae | 8 |
| Trachypogon spicatus | (L.f.) Kuntze | Poaceae | 8 |
| Tradescantia commelinoides | Schult. & Schult.f. | Commelinaceae | 8 |
| Tradescantia crassifolia | Cav. | Commelinaceae | 8 |
| Tradescantia pallida | (Rose) D.R.Hunt | Commelinaceae | 8 |
| Tradescantia poelliae | D.R.Hunt | Commelinaceae | 8 |
| Tradescantia zanonia | (L.) Sw. | Commelinaceae | 8 |
| Tragia nepetifolia | Cav. | Euphorbiaceae | 8 |
| Trema micranthum | (L.) Blume | Cannabaceae | 8 |
| Trianthema portulacastrum | L. | Aizoaceae | 8 |
| Trichilia havanensis | Jacq. | Meliaceae | 8 |
| Trichilia hirta | L. | Meliaceae | 8 |
| Trichilia trifolia | L. | Meliaceae | 8 |
| Trichogalium aschenbornii | (S.Schauer) Kadereit & Schneew. | Rubiaceae | 8 |
| Trichospermum mexicanum | (DC.) Baill. | Malvaceae | 8 |
| Trichostigma octandrum | (L.) H.Walter | Petiveriaceae | 8 |
| Tridax balbisioides | (Kunth) A.Gray | Asteraceae | 8 |
| Tridax brachylepis | Hemsl. | Asteraceae | 8 |
| Tridax coronopifolia | (Kunth) Hemsl. | Asteraceae | 8 |
| Tridax palmeri | A.Gray | Asteraceae | 8 |
| Tridax procumbens | L. | Asteraceae | 8 |
| Tridax rosea | Sch.Bip. | Asteraceae | 8 |
| Tridax trilobata | Hemsl. | Asteraceae | 8 |
| Trifolium amabile | Kunth | Fabaceae | 8 |
| Triglochin scilloides | (Poir.) Mering & Kadereit | Juncaginaceae | 8 |
| Trigonospermum melampodioides | DC. | Asteraceae | 8 |
| Triodanis perfoliata | (L.) Nieuwl. | Campanulaceae | 8 |
| Triphora trianthophoros | (Sw.) Rydb. | Orchidaceae | 8 |
| Tripogandra amplexicaulis | (Klotzsch ex C.B.Clarke) Woodson | Commelinaceae | 8 |
| Tripogandra purpurascens | (S.Schauer) Handlos | Commelinaceae | 8 |
| Tripogandra serrulata | (Vahl) Handlos | Commelinaceae | 8 |
| Tripogonella spicata | (Nees) P.M.Peterson & Romasch. | Poaceae | 8 |
| Tripsacum dactyloides | (L.) L. | Poaceae | 8 |
| Triumfetta semitriloba | Jacq. | Malvaceae | 8 |
| Trixis inula | Crantz | Asteraceae | 8 |
| Trophis racemosa | (L.) Urb. | Moraceae | 8 |
| Turnera callosa | Urb. | Passifloraceae | 8 |
| Turnera diffusa | Willd. ex Schult. | Passifloraceae | 8 |
| Turnera pumilea | L. | Passifloraceae | 8 |
| Turnera ulmifolia | L. | Passifloraceae | 8 |
| Turpinia occidentalis | (Sw.) G.Don | Staphyleaceae | 8 |
| Tutunakanthus velutinus | (Schltdl.) Morillo, Liede & Meve | Apocynaceae | 8 |
| Typha angustifolia | L. | Typhaceae | 8 |
| Typha domingensis | Pers. | Typhaceae | 8 |
| Typha latifolia | L. | Typhaceae | 8 |
| Ugni myricoides | (Kunth) O.Berg | Myrtaceae | 8 |
| Ulmus mexicana | (Liebm.) Planch. | Ulmaceae | 8 |
| Urena lobata | L. | Malvaceae | 8 |
| Urera baccifera | (L.) Gaudich. ex Wedd. | Urticaceae | 8 |
| Urera caracasana | (Jacq.) Gaudich. ex Griseb. | Urticaceae | 8 |
| Urtica chamaedryoides | Pursh | Urticaceae | 8 |
| Urtica gracilis | Aiton | Urticaceae | 8 |
| Urvillea ulmacea | Kunth | Sapindaceae | 8 |
| Utricularia foliosa | L. | Lentibulariaceae | 8 |
| Utricularia gibba | L. | Lentibulariaceae | 8 |
| Utricularia livida | E.Mey. | Lentibulariaceae | 8 |
| Utricularia macrorhiza | Leconte | Lentibulariaceae | 8 |
| Utricularia pusilla | Vahl | Lentibulariaceae | 8 |
| Utricularia subulata | L. | Lentibulariaceae | 8 |
| Vaccinium leucanthum | Schltdl. | Ericaceae | 8 |
| Vachellia campeachiana | (Mill.) Seigler & Ebinger | Fabaceae | 8 |
| Vachellia constricta | (Benth.) Seigler & Ebinger | Fabaceae | 8 |
| Vachellia cornigera | (L.) Seigler & Ebinger | Fabaceae | 8 |
| Vachellia farnesiana | (L.) Wight & Arn. | Fabaceae | 8 |
| Vachellia hindsii | (Benth.) Seigler & Ebinger | Fabaceae | 8 |
| Vachellia macracantha | (Humb. & Bonpl. ex Willd.) Seigler & Ebinger | Fabaceae | 8 |
| Vachellia pennatula | (Schltdl. & Cham.) Seigler & Ebinger | Fabaceae | 8 |
| Vachellia rigidula | (Benth.) Seigler & Ebinger | Fabaceae | 8 |
| Vachellia schaffneri | (S.Watson) Seigler & Ebinger | Fabaceae | 8 |
| Vachellia vernicosa | (Britton & Rose) Seigler & Ebinger | Fabaceae | 8 |
| Valeriana clematitis | Kunth | Caprifoliaceae | 8 |
| Valeriana edulis | Nutt. | Caprifoliaceae | 8 |
| Valeriana scandens | L. | Caprifoliaceae | 8 |
| Valeriana sorbifolia | Kunth | Caprifoliaceae | 8 |
| Varronia curassavica | Jacq. | Cordiaceae | 8 |
| Varronia spinescens | (L.) Borhidi | Cordiaceae | 8 |
| Verbena bipinnatifida | (Nutt.) Schauer | Verbenaceae | 8 |
| Verbena bracteata | Cav. ex Lag. & Rodr. | Verbenaceae | 8 |
| Verbena canescens | Kunth | Verbenaceae | 8 |
| Verbena carolina | L. | Verbenaceae | 8 |
| Verbena elegans | Kunth | Verbenaceae | 8 |
| Verbena halei | Small | Verbenaceae | 8 |
| Verbena litoralis | Kunth | Verbenaceae | 8 |
| Verbena menthifolia | Benth. | Verbenaceae | 8 |
| Verbena neomexicana | (A.Gray) Briq. | Verbenaceae | 8 |
| Verbena recta | Kunth | Verbenaceae | 8 |
| Verbesina crocata | (Cav.) Less. | Asteraceae | 8 |
| Verbesina fastigiata | B.L.Rob. & Greenm. | Asteraceae | 8 |
| Verbesina liebmannii | Sch.Bip. ex Klatt | Asteraceae | 8 |
| Verbesina oligantha | B.L.Rob. | Asteraceae | 8 |
| Verbesina oncophora | B.L.Rob. & Seaton | Asteraceae | 8 |
| Verbesina parviflora | S.F.Blake | Asteraceae | 8 |
| Verbesina pedunculosa | (DC.) B.L.Rob. | Asteraceae | 8 |
| Verbesina persicifolia | DC. | Asteraceae | 8 |
| Verbesina serrata | Cav. | Asteraceae | 8 |
| Verbesina sphaerocephala | A.Gray | Asteraceae | 8 |
| Verbesina tetraptera | A.Gray | Asteraceae | 8 |
| Verbesina turbacensis | Kunth | Asteraceae | 8 |
| Verbesina virgata | Cav. | Asteraceae | 8 |
| Vernonanthura patens | (Kunth) H.Rob. | Asteraceae | 8 |
| Vernonia paniculata | DC. | Asteraceae | 8 |
| Veronica americana | (Raf.) Schwein. ex Benth. | Plantaginaceae | 8 |
| Veronica peregrina | L. | Plantaginaceae | 8 |
| Vicia americana | Muhl. ex Willd. | Fabaceae | 8 |
| Vicia pulchella | Kunth | Fabaceae | 8 |
| Vigna luteola | (Jacq.) Benth. | Fabaceae | 8 |
| Vigna vexillata | (L.) A.Rich. | Fabaceae | 8 |
| Viguiera dentata | (Cav.) Spreng. | Asteraceae | 8 |
| Viguiera linearis | (Cav.) Sch.Bip. ex Hemsl. | Asteraceae | 8 |
| Villadia albiflora | (Hemsl.) Rose | Crassulaceae | 8 |
| Villanova oppositifolia | Lag. | Asteraceae | 8 |
| Vismia baccifera | (L.) Triana & Planch. | Hypericaceae | 8 |
| Vitex mollis | Kunth | Lamiaceae | 8 |
| Vitex pyramidata | B.L.Rob. | Lamiaceae | 8 |
| Vitis berlandieri | Planch. | Vitaceae | 8 |
| Vitis cinerea | (Engelm.) Millardet | Vitaceae | 8 |
| Vitis tiliifolia | Humb. & Bonpl. ex Schult. | Vitaceae | 8 |
| Waltheria indica | L. | Malvaceae | 8 |
| Wedelia acapulcensis | Kunth | Asteraceae | 8 |
| Weldenia candida | Schult.f. | Commelinaceae | 8 |
| Wigandia urens | (Ruiz & Pav.) Kunth | Namaceae | 8 |
| Wimmeria microphylla | Radlk. | Celastraceae | 8 |
| Wimmeria persicifolia | Radlk. | Celastraceae | 8 |
| Wissadula amplissima | (L.) R.E.Fr. | Malvaceae | 8 |
| Witheringia meiantha | (Donn.Sm.) Hunz. | Solanaceae | 8 |
| Witheringia solanacea | L'Hér. | Solanaceae | 8 |
| Wolffia brasiliensis | Wedd. | Araceae | 8 |
| Wolffia columbiana | H.Karst. | Araceae | 8 |
| Wolffiella gladiata | (Hegelm.) Hegelm. | Araceae | 8 |
| Xanthium orientale | L. | Asteraceae | 8 |
| Xanthosoma robustum | Schott | Araceae | 8 |
| Xanthosoma wendlandii | (Schott) Standl. | Araceae | 8 |
| Ximenia americana | L. | Olacaceae | 8 |
| Xiphidium caeruleum | Aubl. | Haemodoraceae | 8 |
| Xylosma flexuosa | (Kunth) Hemsl. | Salicaceae | 8 |
| Xylosma intermedia | (Seem.) Triana & Planch. | Salicaceae | 8 |
| Yucca aloifolia | L. | Asparagaceae | 8 |
| Yucca filifera | Chabaud | Asparagaceae | 8 |
| Yucca gigantea | Lem. | Asparagaceae | 8 |
| Yucca periculosa | Baker | Asparagaceae | 8 |
| Zaluzania augusta | (Lag.) Sch.Bip. | Asteraceae | 8 |
| Zaluzania triloba | (Ortega) Pers. | Asteraceae | 8 |
| Zannichellia palustris | L. | Potamogetonaceae | 8 |
| Zanthoxylum arborescens | Rose | Rutaceae | 8 |
| Zanthoxylum fagara | Sarg. | Rutaceae | 8 |
| Zanthoxylum melanostictum | Schltdl. & Cham. | Rutaceae | 8 |
| Zapoteca formosa | (Kunth) H.M.Hern. | Fabaceae | 8 |
| Zea mays | L. | Poaceae | 8 |
| Zeltnera calycosa | (Buckley) G.Mans. | Gentianaceae | 8 |
| Zephyranthes carinata | Herb. | Amaryllidaceae | 8 |
| Zephyranthes fosteri | Traub | Amaryllidaceae | 8 |
| Zephyranthes minuta | (Kunth) D.Dietr. | Amaryllidaceae | 8 |
| Zinnia elegans | Jacq. | Asteraceae | 8 |
| Zinnia peruviana | (L.) L. | Asteraceae | 8 |
| Zinnia zinnioides | (Kunth) Olorode & A.M.Torres | Asteraceae | 8 |
| Zornia reticulata | Sm. | Fabaceae | 8 |
| Zornia thymifolia | Kunth | Fabaceae | 8 |
| Zuloagaea bulbosa | (Kunth) Bess | Poaceae | 8 |
| Achimenes flava | C.V.Morton | Gesneriaceae | 7 |
| Agalinis peduncularis | (Benth.) Pennell | Orobanchaceae | 7 |
| Agarista mexicana | (Hemsl.) Judd | Ericaceae | 7 |
| Ageratina brevipes | (DC.) R.M.King & H.Rob. | Asteraceae | 7 |
| Aldama ghiesbreghtii | (Hemsl.) E.E.Schill. & Panero | Asteraceae | 7 |
| Aphananthe monoica | (Hemsl.) J.-F.Leroy | Cannabaceae | 7 |
| Aporocactus flagelliformis | (L.) Lem. | Cactaceae | 7 |
| Aquilegia skinneri | Hook. | Ranunculaceae | 7 |
| Arisaema macrospathum | Benth. | Araceae | 7 |
| Aristolochia pringlei | Rose | Aristolochiaceae | 7 |
| Asclepias mexicana | Cav. | Apocynaceae | 7 |
| Asplenium harpeodes | Kunze | Aspleniaceae | 7 |
| Astragalus guatemalensis | Hemsl. | Fabaceae | 7 |
| Astrolepis crassifolia | (Houlston & T.Moore) D.M.Benham & Windham | Pteridaceae | 7 |
| Bauhinia ramosissima | Benth. ex Hemsl. | Fabaceae | 7 |
| Begonia oaxacana | A.DC. | Begoniaceae | 7 |
| Berberis alpina | Zamudio | Berberidaceae | 7 |
| Bernardia mexicana | (Hook. & Arn.) Müll.Arg. | Euphorbiaceae | 7 |
| Bidens anthemoides | Sherff | Asteraceae | 7 |
| Bletia brevicaulis | (L.O.Williams) Sosa & M.W.Chase | Orchidaceae | 7 |
| Boerhavia ciliata | Brandegee | Nyctaginaceae | 7 |
| Bouteloua radicosa | (E.Fourn.) Griffiths | Poaceae | 7 |
| Bromus marginatus | Nees ex Steud. | Poaceae | 7 |
| Brongniartia intermedia | Moric. | Fabaceae | 7 |
| Bursera linanoe | (La Llave) Rzed., Calderón & Medina | Burseraceae | 7 |
| Bursera submoniliformis | Engl. | Burseraceae | 7 |
| Casearia aculeata | Jacq. | Salicaceae | 7 |
| Chloris radiata | (L.) Sw. | Poaceae | 7 |
| Christella hispidula | (Decne.) Holttum | Thelypteridaceae | 7 |
| Chrysanthellum indicum | DC. | Asteraceae | 7 |
| Cirsium anartiolepis | Petr. | Asteraceae | 7 |
| Clethra lanata | M.Martens & Galeotti | Clethraceae | 7 |
| Commelina elliptica | Kunth | Commelinaceae | 7 |
| Condalia mexicana | Schltdl. | Rhamnaceae | 7 |
| Cuphea koehneana | Rose | Lythraceae | 7 |
| Cynanchum foetidum | (Cav.) Kunth | Apocynaceae | 7 |
| Cyperus hortensis | (Salzm. ex Steud.) Dorr | Cyperaceae | 7 |
| Cyperus pallidicolor | (Kük.) G.C.Tucker | Cyperaceae | 7 |
| Desmodium axillare | (Sw.) DC. | Fabaceae | 7 |
| Diplopterygium bancroftii | (Hook.) A.R.Sm. | Gleicheniaceae | 7 |
| Eleocharis bonariensis | Nees | Cyperaceae | 7 |
| Elionurus barbiculmis | Hack. ex Scribn. | Poaceae | 7 |
| Epidendrum cristatum | Ruiz & Pav. | Orchidaceae | 7 |
| Epidendrum veroscriptum | Hágsater | Orchidaceae | 7 |
| Eriochloa acuminata | (J.Presl) Kunth | Poaceae | 7 |
| Eryngium cymosum | F.Delaroche | Apiaceae | 7 |
| Evolvulus convolvuloides | (Willd.) Stearn | Convolvulaceae | 7 |
| Galphimia paniculata | Bartl. | Malpighiaceae | 7 |
| Geranium bellum | Rose | Geraniaceae | 7 |
| Gnaphaliothamnus salicifolius | (Bertol.) G.L.Nesom | Asteraceae | 7 |
| Gomphrena nitida | Rothr. | Amaranthaceae | 7 |
| Gonolobus jaliscensis | B.L.Rob. & Greenm. | Apocynaceae | 7 |
| Habenaria jaliscana | S.Watson | Orchidaceae | 7 |
| Hackelia mexicana | (Schltdl. & Cham.) I.M.Johnst. | Boraginaceae | 7 |
| Harpalyce formosa | DC. | Fabaceae | 7 |
| Hibiscus longifilus | Fryxell | Malvaceae | 7 |
| Homalopetalum pachyphyllum | (L.O.Williams) Dressler | Orchidaceae | 7 |
| Ipomoea neurocephala | Hallier f. | Convolvulaceae | 7 |
| Jaegeria bellidiflora | (Moc. & Sessé ex DC.) A.M.Torres & Beaman | Asteraceae | 7 |
| Juniperus poblana | (Martínez) R.P.Adams | Cupressaceae | 7 |
| Lasiacis nigra | Davidse | Poaceae | 7 |
| Leochilus carinatus | (Knowles & Westc.) Lindl. | Orchidaceae | 7 |
| Lonchocarpus guatemalensis | Benth. | Fabaceae | 7 |
| Luzula vulcanica | Liebm. | Juncaceae | 7 |
| Machaonia erythrocarpa | (Standl.) Borhidi | Rubiaceae | 7 |
| Malaxis excavata | (Lindl.) Kuntze | Orchidaceae | 7 |
| Malaxis maianthemifolia | Schltdl. & Cham. | Orchidaceae | 7 |
| Manihot aesculifolia | (Kunth) Pohl | Euphorbiaceae | 7 |
| Maxillaria elatior | (Rchb.f.) Rchb.f. | Orchidaceae | 7 |
| Myriocarpa longipes | Liebm. | Urticaceae | 7 |
| Olyra latifolia | L. | Poaceae | 7 |
| Oncaglossum pringlei | (Greenm.) Sutorý | Boraginaceae | 7 |
| Ophioglossum nudicaule | L.f. | Ophioglossaceae | 7 |
| Passiflora serratifolia | L. | Passifloraceae | 7 |
| Phemeranthus oligospermus | (Brandegee) Ocampo | Montiaceae | 7 |
| Phyllonoma laticuspis | (Turcz.) Engl. | Phyllonomaceae | 7 |
| Pinguicula crenatiloba | A.DC. | Lentibulariaceae | 7 |
| Plantago linearis | Kunth | Plantaginaceae | 7 |
| Populus mexicana | Wesm. | Salicaceae | 7 |
| Prosthechea rhynchophora | (A.Rich. & Galeotti) W.E.Higgins | Orchidaceae | 7 |
| Pseudalcantarea viridiflora | (Beer) Pinzón & Barfuss | Bromeliaceae | 7 |
| Pseudognaphalium viscosum | (Kunth) Anderb. | Asteraceae | 7 |
| Psychotria biaristata | Bartl. ex DC. | Rubiaceae | 7 |
| Psychotria horizontalis | Sw. | Rubiaceae | 7 |
| Quercus conzattii | Trel. | Fagaceae | 7 |
| Quercus crassipes | Bonpl. | Fagaceae | 7 |
| Rubus urticifolius | Poir. | Rosaceae | 7 |
| Ruehssia lanata | (Paul G.Wilson) L.O.Alvarado | Apocynaceae | 7 |
| Ruellia intermedia | Leonard | Acanthaceae | 7 |
| Salvia disjuncta | Fernald | Lamiaceae | 7 |
| Salvia nervata | M.Martens & Galeotti | Lamiaceae | 7 |
| Salvia recurva | Benth. | Lamiaceae | 7 |
| Securidaca diversifolia | (L.) S.F.Blake | Polygalaceae | 7 |
| Sedum confusum | Hemsl. | Crassulaceae | 7 |
| Serjania cardiospermoides | Schltdl. & Cham. | Sapindaceae | 7 |
| Smithiantha multiflora | (M.Martens & Galeotti) Fritsch | Gesneriaceae | 7 |
| Solanum tampicense | Dunal | Solanaceae | 7 |
| Struthanthus interruptus | G.Don | Loranthaceae | 7 |
| Talayotea trachyantha | (Greenm.) L.O.Alvarado | Apocynaceae | 7 |
| Tephrosia multifolia | Rose | Fabaceae | 7 |
| Tephrosia nicaraguensis | Oerst. | Fabaceae | 7 |
| Tetranema roseum | (M.Martens & Galeotti) Standl. & Steyerm. | Plantaginaceae | 7 |
| Thenardia floribunda | Kunth | Apocynaceae | 7 |
| Tripogandra disgrega | (Kunth) Woodson | Commelinaceae | 7 |
| Trixis anomala | B.L.Turner | Asteraceae | 7 |
| Vaccinium geminiflorum | Kunth | Ericaceae | 7 |
| Vanilla inodora | Schiede | Orchidaceae | 7 |
| Woodwardia spinulosa | M.Martens & Galeotti | Blechnaceae | 7 |
| Abutilon andrieuxii | Hemsl. | Malvaceae | 6 |
| Achimenes pedunculata | Benth. | Gesneriaceae | 6 |
| Acianthera circumplexa | (Lindl.) Pridgeon & M.W.Chase | Orchidaceae | 6 |
| Adiantum tetraphyllum | Humb. & Bonpl. ex Willd. | Pteridaceae | 6 |
| Agave collina | Greenm. | Asparagaceae | 6 |
| Ageratina liebmannii | (Sch.Bip. ex Klatt) R.M.King & H.Rob. | Asteraceae | 6 |
| Ageratina vernalis | (Vatke & Kurtz) R.M.King & H.Rob. | Asteraceae | 6 |
| Allium glandulosum | Link & Otto | Amaryllidaceae | 6 |
| Alloispermum scabrum | (Lag.) H.Rob. | Asteraceae | 6 |
| Anthephora hermaphrodita | (L.) Kuntze | Poaceae | 6 |
| Antiphytum heliotropioides | A.DC. | Boraginaceae | 6 |
| Aporocactus martianus | (Zucc.) Britton & Rose | Cactaceae | 6 |
| Arenaria bourgaei | Hemsl. | Caryophyllaceae | 6 |
| Argyrochosma formosa | (Liebm.) Windham | Pteridaceae | 6 |
| Arpophyllum laxiflorum | Pfitzer | Orchidaceae | 6 |
| Asclepias pringlei | (Greenm.) Woodson | Apocynaceae | 6 |
| Asclepias virletii | E.Fourn. | Apocynaceae | 6 |
| Atriplex cristata | Humb. & Bonpl. ex Willd. | Chenopodiaceae | 6 |
| Barkeria vanneriana | Rchb.f. | Orchidaceae | 6 |
| Begonia bulbillifera | Link & Otto | Begoniaceae | 6 |
| Berberis eutriphylla | (Fedde) C.H.Mull. | Berberidaceae | 6 |
| Berberis moranensis | Hebenstr. & Ludw. ex Schult. & Schult.f. | Berberidaceae | 6 |
| Bouteloua diversispicula | Columbus | Poaceae | 6 |
| Brahea calcarea | Liebm. | Arecaceae | 6 |
| Buchnera obliqua | Benth. | Orobanchaceae | 6 |
| Calcicola parvifolia | (A.Juss.) W.R.Anderson & C.Davis | Malpighiaceae | 6 |
| Calochortus nigrescens | Ownbey | Liliaceae | 6 |
| Canavalia brasiliensis | Mart. ex Benth. | Fabaceae | 6 |
| Carex boliviensis | Van Heurck & Müll.Arg. | Cyperaceae | 6 |
| Castilleja nervata | Eastw. | Orobanchaceae | 6 |
| Chamaedorea microspadix | Burret | Arecaceae | 6 |
| Chiococca filipes | Lundell | Rubiaceae | 6 |
| Chiococca oaxacana | Standl. | Rubiaceae | 6 |
| Clematis polygama | Jacq. | Ranunculaceae | 6 |
| Clethra hartwegii | Britton | Clethraceae | 6 |
| Columnea sulfurea | Donn.Sm. | Gesneriaceae | 6 |
| Corallorhiza macrantha | Schltr. | Orchidaceae | 6 |
| Cornutia pyramidata | L. | Lamiaceae | 6 |
| Coryphantha cornifera | (DC.) Lem. | Cactaceae | 6 |
| Coryphantha ottonis | (Pfeiff.) Lem. | Cactaceae | 6 |
| Crotalaria longirostrata | Hook. & Arn. | Fabaceae | 6 |
| Croton argenteus | L. | Euphorbiaceae | 6 |
| Cuphea calophylla | Cham. & Schltdl. | Lythraceae | 6 |
| Cuphea lanceolata | W.T.Aiton | Lythraceae | 6 |
| Cuphea schumannii | Koehne | Lythraceae | 6 |
| Cyclanthera langaei | Cogn. | Cucurbitaceae | 6 |
| Cyperus amabilis | Vahl | Cyperaceae | 6 |
| Datura leichhardtii | F.Muell. ex Benth. | Solanaceae | 6 |
| Desmodium densiflorum | Hemsl. | Fabaceae | 6 |
| Diodia saponariifolia | (Cham. & Schltdl.) K.Schum. | Rubiaceae | 6 |
| Drymaria xerophylla | A.Gray | Caryophyllaceae | 6 |
| Echinocactus horizonthalonius | Lem. | Cactaceae | 6 |
| Echinopterys eglandulosa | (A.Juss.) Small | Malpighiaceae | 6 |
| Elaphoglossum engelii | (H.Karst.) Christ | Dryopteridaceae | 6 |
| Epaltes mexicana | Less. | Asteraceae | 6 |
| Epidendrum chlorocorymbos | Schltr. | Orchidaceae | 6 |
| Epidendrum eximium | L.O.Williams | Orchidaceae | 6 |
| Eragrostis capillaris | (L.) Nees | Poaceae | 6 |
| Erycina hyalinobulbon | (Lex.) N.H.Williams & M.W.Chase | Orchidaceae | 6 |
| Eryngium gracile | F.Delaroche | Apiaceae | 6 |
| Erythrina standleyana | Krukoff | Fabaceae | 6 |
| Escontria chiotilla | (F.A.C.Weber ex K.Schum.) Rose | Cactaceae | 6 |
| Eucnide grandiflora | (Groenland) Rose | Loasaceae | 6 |
| Euphorbia bracteata | Jacq. | Euphorbiaceae | 6 |
| Euphorbia tanquahuete | Sessé & Moc. | Euphorbiaceae | 6 |
| Euphorbia xalapensis | Kunth | Euphorbiaceae | 6 |
| Euploca fruticosa | (L.) J.I.M.Melo & Semir | Heliotropiaceae | 6 |
| Galeana pratensis | Rydb. | Asteraceae | 6 |
| Govenia capitata | Lindl. | Orchidaceae | 6 |
| Heteropterys laurifolia | (L.) A.Juss. | Malpighiaceae | 6 |
| Heuchera longipetala | Moc. ex Ser. | Saxifragaceae | 6 |
| Heuchera mexicana | W.Schaffn. ex Rydb. | Saxifragaceae | 6 |
| Hypoxis mexicana | Schult. & Schult.f. | Hypoxidaceae | 6 |
| Hyptis atrorubens | Poit. | Lamiaceae | 6 |
| Ipomoea reticulata | O'Donell | Convolvulaceae | 6 |
| Ipomoea santillanii | O'Donell | Convolvulaceae | 6 |
| Juniperus monticola | Martínez | Cupressaceae | 6 |
| Justicia carthaginensis | Jacq. | Acanthaceae | 6 |
| Lasianthaea macrocephala | (Hook. & Arn.) K.M.Becker | Asteraceae | 6 |
| Laubertia contorta | (M.Martens & Galeotti) Woodson | Apocynaceae | 6 |
| Leucaena lanceolata | S.Watson | Fabaceae | 6 |
| Linum scabrellum | Planch. | Linaceae | 6 |
| Lobelia xalapensis | Kunth | Campanulaceae | 6 |
| Lycianthes dejecta | (Fernald) Bitter | Solanaceae | 6 |
| Lycianthes surotatensis | Gentry | Solanaceae | 6 |
| Lythrum vulneraria | Ait. ex Schrank | Lythraceae | 6 |
| Mammillaria karwinskiana | Mart. | Cactaceae | 6 |
| Mariosousa salazarii | (Britton & Rose) Seigler & Ebinger | Fabaceae | 6 |
| Marsilea mollis | B.L.Rob. & Fernald | Marsileaceae | 6 |
| Maxillaria meleagris | Lindl. | Orchidaceae | 6 |
| Menodora intricata | Brandegee | Oleaceae | 6 |
| Miconia matudae | (L.O.Williams) Michelang. | Melastomataceae | 6 |
| Miconia oligotricha | (DC.) Naudin | Melastomataceae | 6 |
| Miconia trinervia | D.Don ex Loudon | Melastomataceae | 6 |
| Microchloa kunthii | Desv. | Poaceae | 6 |
| Microdesmia arborea | (Seem.) Sothers & Prance | Chrysobalanaceae | 6 |
| Micropleura renifolia | Lag. | Apiaceae | 6 |
| Mimosa depauperata | Benth. | Fabaceae | 6 |
| Mimosa galeottii | Benth. | Fabaceae | 6 |
| Morisonia pringlei | (Briq.) Christenh. & Byng | Capparaceae | 6 |
| Muhlenbergia versicolor | Swallen | Poaceae | 6 |
| Nama origanifolia | Kunth | Namaceae | 6 |
| Neopringlea integrifolia | (Hemsl.) S.Watson | Salicaceae | 6 |
| Nephrolepis pectinata | (Willd.) Schott | Nephrolepidaceae | 6 |
| Nissolia brasiliensis | (Vogel) T.M.Moura & Fort.-Perez | Fabaceae | 6 |
| Oxylobus arbutifolius | (Kunth) A.Gray | Asteraceae | 6 |
| Paederia ciliata | (Bartl. ex DC.) Standl. | Rubiaceae | 6 |
| Passiflora juliana | J.M.MacDougal | Passifloraceae | 6 |
| Peperomia hispidula | (Sw.) A.Dietr. | Piperaceae | 6 |
| Pilosocereus chrysacanthus | (F.A.C.Weber ex K.Schum.) Byles & G.D.Rowley | Cactaceae | 6 |
| Piper jacquemontianum | Kunth | Piperaceae | 6 |
| Piqueria pilosa | Kunth | Asteraceae | 6 |
| Pitcairnia imbricata | (Brongn.) Regel | Bromeliaceae | 6 |
| Polemonium grandiflorum | Benth. | Polemoniaceae | 6 |
| Polypodium rhodopleuron | Kunze | Polypodiaceae | 6 |
| Ponthieva formosa | Schltr. | Orchidaceae | 6 |
| Prockia crucis | P.Browne ex L. | Salicaceae | 6 |
| Prosthechea pygmaea | (Hook.) W.E.Higgins | Orchidaceae | 6 |
| Pterostemon rotundifolius | Ramirez | Iteaceae | 6 |
| Quercus glaucescens | Bonpl. | Fagaceae | 6 |
| Quercus scytophylla | Liebm. | Fagaceae | 6 |
| Roldana reticulata | (DC.) H.Rob. & Brettell | Asteraceae | 6 |
| Russelia retrorsa | Greene | Plantaginaceae | 6 |
| Sageretia elegans | (Kunth) Brongn. | Rhamnaceae | 6 |
| Salmea scandens | (L.) DC. | Asteraceae | 6 |
| Sapium macrocarpum | Müll.Arg. | Euphorbiaceae | 6 |
| Schistocarpha bicolor | Less. | Asteraceae | 6 |
| Schoenocaulon calcicola | Greenm. | Melanthiaceae | 6 |
| Sedum liebmannianum | Hemsl. | Crassulaceae | 6 |
| Senegalia subangulata | (Rose) Britton & Rose | Fabaceae | 6 |
| Senna papillosa | (Britton & Rose) H.S.Irwin & Barneby | Fabaceae | 6 |
| Setaria macrosperma | (Scribn. & Merr.) K.Schum. | Poaceae | 6 |
| Sigmoidotropis speciosa | (Kunth) A.Delgado | Fabaceae | 6 |
| Stevia caracasana | DC. | Asteraceae | 6 |
| Stevia jorullensis | Kunth | Asteraceae | 6 |
| Sticherus furcatus | (L.) Ching | Gleicheniaceae | 6 |
| Strychnos brachistantha | Standl. | Loganiaceae | 6 |
| Thouinia paucidentata | Radlk. | Sapindaceae | 6 |
| Tragia volubilis | L. | Euphorbiaceae | 6 |
| Trichocentrum brachyphyllum | (Lindl.) R.Jiménez | Orchidaceae | 6 |
| Tridax luisana | Brandegee | Asteraceae | 6 |
| Tridax platyphylla | B.L.Rob. | Asteraceae | 6 |
| Trixis angustifolia | DC. | Asteraceae | 6 |
| Trixis mexicana | Lex. | Asteraceae | 6 |
| Urostephanus gonoloboides | B.L.Rob. & Greenm. | Apocynaceae | 6 |
| Valeriana selerorum | Graebn. & Loes. | Caprifoliaceae | 6 |
| Varronia bullata | L. | Cordiaceae | 6 |
| Vasconcellea cauliflora | (Jacq.) A.DC. | Caricaceae | 6 |
| Verbesina breedlovei | B.L.Turner | Asteraceae | 6 |
| Verbesina longipes | Hemsl. | Asteraceae | 6 |
| Viguiera excelsa | (Willd.) Benth. & Hook.f. | Asteraceae | 6 |
| Viola nannei | Pol. | Violaceae | 6 |
| Vittaria graminifolia | Kaulf. | Pteridaceae | 6 |
| Wedelia purpurea | (Greenm.) B.L.Turner | Asteraceae | 6 |
| Zapoteca media | (M.Martens & Galeotti) H.M.Hern. | Fabaceae | 6 |
| Zinnia angustifolia | Kunth | Asteraceae | 6 |
| Abutilon hulseanum | (Torr. & A.Gray) Torr. ex Baker f. | Malvaceae | 5 |
| Aeschynomene rudis | Benth. | Fabaceae | 5 |
| Agave obscura | Schiede ex Schltdl. | Asparagaceae | 5 |
| Agave scabra | Ortega | Asparagaceae | 5 |
| Alchemilla aphanoides | Mutis ex L.f. | Rosaceae | 5 |
| Allophylus cominia | (L.) Sw. | Sapindaceae | 5 |
| Ardisia pellucida | Oerst. | Primulaceae | 5 |
| Aristida havardii | Vasey | Poaceae | 5 |
| Aristida schiedeana | Trin. & Rupr. | Poaceae | 5 |
| Arpophyllum spicatum | Lex. | Orchidaceae | 5 |
| Arracacia atropurpurea | Benth. & Hook.f. ex Hemsl. | Apiaceae | 5 |
| Asemeia violacea | (Aubl.) J.F.B.Pastore & J.R.Abbott | Polygalaceae | 5 |
| Aspidosperma megalocarpon | Müll.Arg. | Apocynaceae | 5 |
| Asplenium sessilifolium | Desv. | Aspleniaceae | 5 |
| Astragalus hypoleucus | S.Schauer | Fabaceae | 5 |
| Astragalus radicans | Hornem. | Fabaceae | 5 |
| Baccharis lancifolia | Less. | Asteraceae | 5 |
| Bauhinia chapulhuacania | Wunderlin | Fabaceae | 5 |
| Bidens angustissima | Kunth | Asteraceae | 5 |
| Bidens riparia | Kunth | Asteraceae | 5 |
| Blechnum polypodioides | Raddi | Blechnaceae | 5 |
| Bletia coccinea | Lex. | Orchidaceae | 5 |
| Bothriochloa springfieldii | (Gould) Parodi | Poaceae | 5 |
| Bouvardia erecta | (DC.) Standl. | Rubiaceae | 5 |
| Buddleja parviflora | Kunth | Scrophulariaceae | 5 |
| Buddleja perfoliata | Kunth | Scrophulariaceae | 5 |
| Bulbostylis tenuifolia | (Rudge) J.F.Macbr. | Cyperaceae | 5 |
| Bunchosia biocellata | Schltdl. | Malpighiaceae | 5 |
| Bursera glabrifolia | (Kunth) Engl. | Burseraceae | 5 |
| Byrsonima roigii | Urb. | Malpighiaceae | 5 |
| Cabomba palaeformis | Fassett | Cabombaceae | 5 |
| Casearia nitida | (L.) Jacq. | Salicaceae | 5 |
| Cercocarpus pringlei | (C.K.Schneid.) Rydb. | Rosaceae | 5 |
| Cerdia virescens | Moc. & Sessé | Caryophyllaceae | 5 |
| Cirsium conspicuum | Sch.Bip. | Asteraceae | 5 |
| Cleome pilosa | Benth. | Cleomaceae | 5 |
| Clibadium arboreum | Donn.Sm. | Asteraceae | 5 |
| Coccoloba barbadensis | Jacq. | Polygonaceae | 5 |
| Coelia triptera | (Sm.) Mutel | Orchidaceae | 5 |
| Colubrina elliptica | (Sw.) Briz. & W.L.Stern | Rhamnaceae | 5 |
| Commelina rufipes | Seub. | Commelinaceae | 5 |
| Crotalaria maypurensis | Kunth | Fabaceae | 5 |
| Croton xalapensis | Kunth | Euphorbiaceae | 5 |
| Crusea wrightii | A.Gray | Rubiaceae | 5 |
| Cuphea bustamanta | Lex. | Lythraceae | 5 |
| Cuphea lutea | Rose ex Koehne | Lythraceae | 5 |
| Cuscuta chinensis | Lam. | Convolvulaceae | 5 |
| Cyclanthera integrifoliola | Cogn. | Cucurbitaceae | 5 |
| Cyperus laxus | Lam. | Cyperaceae | 5 |
| Cyperus mutisii | (Kunth) Andersson | Cyperaceae | 5 |
| Cyperus reflexus | Vahl | Cyperaceae | 5 |
| Dalea tomentosa | (Cav.) Willd. | Fabaceae | 5 |
| Desmodium affine | Schltdl. | Fabaceae | 5 |
| Dianthera candelariae | (Oerst.) Hemsl. | Acanthaceae | 5 |
| Didymoglossum petersii | (A.Gray) Copel. | Hymenophyllaceae | 5 |
| Dioscorea carpomaculata | O.Téllez & B.G.Schub. | Dioscoreaceae | 5 |
| Drypetes gentryi | Monach. | Putranjivaceae | 5 |
| Echinopepon racemosus | (Steud.) C.Jeffrey | Cucurbitaceae | 5 |
| Elymus arizonicus | (Scribn. & J.G.Sm.) Gould | Poaceae | 5 |
| Epidendrum parkinsonianum | Hook. | Orchidaceae | 5 |
| Forchhammeria macrocarpa | Standl. | Resedaceae | 5 |
| Forestiera rotundifolia | (Brandegee) Standl. | Oleaceae | 5 |
| Frangula mcvaughii | (L.A.Johnst. & M.C.Johnst.) A.Pool | Rhamnaceae | 5 |
| Funkiella hyemalis | (A.Rich. & Galeotti) Schltr. | Orchidaceae | 5 |
| Galeoglossum tubulosum | (Lindl.) Salazar & Soto Arenas | Orchidaceae | 5 |
| Geonoma interrupta | (Ruiz & Pav.) Mart. | Arecaceae | 5 |
| Godmania aesculifolia | (Kunth) Standl. | Bignoniaceae | 5 |
| Govenia lagenophora | Lindl. | Orchidaceae | 5 |
| Guarea glabra | Vahl | Meliaceae | 5 |
| Heliconia adflexa | Standl. | Heliconiaceae | 5 |
| Hymenocallis concinna | Baker | Amaryllidaceae | 5 |
| Inga sapindoides | Willd. | Fabaceae | 5 |
| Ipomoea suffulta | (Kunth) G.Don | Convolvulaceae | 5 |
| Iresine angustifolia | Euphrasén | Amaranthaceae | 5 |
| Justicia borrerae | (Hemsl.) T.F.Daniel | Acanthaceae | 5 |
| Justicia oaxacana | (Greenm.) T.F.Daniel | Acanthaceae | 5 |
| Klaprothia fasciculata | (C.Presl) Poston | Loasaceae | 5 |
| Lepidaploa tortuosa | (L.) H.Rob. | Asteraceae | 5 |
| Lomaridium fragile | (Liebm.) Gasper & V.A.O.Dittrich | Blechnaceae | 5 |
| Lonchitis hirsuta | L. | Lonchitidaceae | 5 |
| Lycaste consobrina | Rchb.f. | Orchidaceae | 5 |
| Lysiloma tergeminum | Benth. | Fabaceae | 5 |
| Malvastrum bicuspidatum | (S.Watson) Rose | Malvaceae | 5 |
| Manihot rhomboidea | Müll.Arg. | Euphorbiaceae | 5 |
| Marina scopa | Barneby | Fabaceae | 5 |
| Masdevallia floribunda | Lindl. | Orchidaceae | 5 |
| Melampodium microcephalum | Less. | Asteraceae | 5 |
| Miconia affinis | DC. | Melastomataceae | 5 |
| Miconia minutiflora | (Bonpl.) DC. | Melastomataceae | 5 |
| Mimosa luisana | Brandegee | Fabaceae | 5 |
| Mimosa somnians | Humb. & Bonpl. ex Willd. | Fabaceae | 5 |
| Monstera egregia | Schott | Araceae | 5 |
| Muhlenbergia dubia | E.Fourn. | Poaceae | 5 |
| Muhlenbergia stricta | (J.Presl) Kunth | Poaceae | 5 |
| Nama coulteri | A.Gray | Namaceae | 5 |
| Napeanthus bracteatus | C.V.Morton | Gesneriaceae | 5 |
| Nectandra mollis | (Kunth) Nees | Lauraceae | 5 |
| Oenothera hispida | (Benth.) W.L.Wagner, Hoch & Zarucchi | Onagraceae | 5 |
| Ornithocephalus inflexus | Lindl. | Orchidaceae | 5 |
| Palicourea domingensis | (Jacq.) DC. | Rubiaceae | 5 |
| Passiflora guatemalensis | S.Watson | Passifloraceae | 5 |
| Pavonia uniflora | (Sessé & Moc.) Fryxell | Malvaceae | 5 |
| Pentalinon andrieuxii | (Müll.Arg.) B.F.Hansen & Wunderlin | Apocynaceae | 5 |
| Peperomia berlandieri | Miq. | Piperaceae | 5 |
| Peperomia liebmannii | C.DC. | Piperaceae | 5 |
| Peperomia monticola | Miq. | Piperaceae | 5 |
| Picradeniopsis pringlei | (Greenm.) B.G.Baldwin | Asteraceae | 5 |
| Pilea pubescens | Liebm. | Urticaceae | 5 |
| Pilosocereus alensis | (F.A.C.Weber) Byles & G.D.Rowley | Cactaceae | 5 |
| Pinguicula macrophylla | Kunth | Lentibulariaceae | 5 |
| Pinus pringlei | Shaw | Pinaceae | 5 |
| Piptochaetium brevicalyx | (E.Fourn.) Ricker ex Hitchc. | Poaceae | 5 |
| Plectocephalus rothrockii | (Greenm.) D.J.N.Hind | Asteraceae | 5 |
| Pleopeltis furfuracea | (Schltdl. & Cham.) A.R.Sm. & Tejero | Polypodiaceae | 5 |
| Pleopeltis thyssanolepis | (A.Braun ex Klotzsch) E.G.Andrews & Windham | Polypodiaceae | 5 |
| Pleurothallis quadrifida | (Lex.) Lindl. | Orchidaceae | 5 |
| Ponthieva mexicana | (A.Rich. & Galeotti) Salazar | Orchidaceae | 5 |
| Prosthechea concolor | (Lex.) W.E.Higgins | Orchidaceae | 5 |
| Pseudechinolaena polystachya | (Kunth) Stapf | Poaceae | 5 |
| Pseudognaphalium inornatum | (DC.) Anderb. | Asteraceae | 5 |
| Psilactis brevilingulata | Sch.Bip. ex Hemsl. | Asteraceae | 5 |
| Randia tetracantha | (Cav.) DC. | Rubiaceae | 5 |
| Ranunculus flagelliformis | Sm. | Ranunculaceae | 5 |
| Rhynchospora rugosa | (Vahl) Gale | Cyperaceae | 5 |
| Rhynchostele maculata | (Lex.) Soto Arenas & Salazar | Orchidaceae | 5 |
| Rourea glabra | Kunth | Connaraceae | 5 |
| Ruehssia edulis | (S.Watson) L.O.Alvarado | Apocynaceae | 5 |
| Ruellia hirsutoglandulosa | (Oerst.) Hemsl. | Acanthaceae | 5 |
| Sabdariffa costata | (A.Rich.) M.M.Hanes & R.L.Barrett | Malvaceae | 5 |
| Sabdariffa uncinella | (Moc. & Sessé ex DC.) M.M.Hanes & R.L.Barrett | Malvaceae | 5 |
| Salix paradoxa | Kunth | Salicaceae | 5 |
| Salvia podadena | Briq. | Lamiaceae | 5 |
| Salvia protracta | Benth. | Lamiaceae | 5 |
| Scutellaria hispidula | B.L.Rob. | Lamiaceae | 5 |
| Sedum hemsleyanum | Rose | Crassulaceae | 5 |
| Senecio roseus | Sch.Bip. | Asteraceae | 5 |
| Senna nicaraguensis | (Benth.) H.S.Irwin & Barneby | Fabaceae | 5 |
| Sida glabra | Mill. | Malvaceae | 5 |
| Sideroxylon cartilagineum | (Cronquist) T.D.Penn. | Sapotaceae | 5 |
| Sisyrinchium conzattii | Calderón & Rzed. | Iridaceae | 5 |
| Solanum lanceifolium | Jacq. | Solanaceae | 5 |
| Solanum myriacanthum | Dunal | Solanaceae | 5 |
| Solanum pinnatisectum | Dunal | Solanaceae | 5 |
| Solanum pruinosum | Dunal | Solanaceae | 5 |
| Spermacoce suaveolens | (G.Mey.) Kuntze | Rubiaceae | 5 |
| Stanhopea dodsoniana | Salazar & Soto Arenas | Orchidaceae | 5 |
| Stanhopea tigrina | Bateman ex Lindl. | Orchidaceae | 5 |
| Stemodia peduncularis | Benth. | Plantaginaceae | 5 |
| Stevia micrantha | Lag. | Asteraceae | 5 |
| Symphoricarpos microphyllus | (Humb. & Bonpl. ex Schult.) Kunth | Caprifoliaceae | 5 |
| Taxus globosa | Schltdl. | Taxaceae | 5 |
| Tectaria mexicana | (Fée) C.V.Morton | Tectariaceae | 5 |
| Ternstroemia lineata | DC. | Pentaphylacaceae | 5 |
| Tillandsia gymnobotrya | Baker | Bromeliaceae | 5 |
| Tillandsia polystachia | (L.) L. | Bromeliaceae | 5 |
| Trichosalpinx blaisdellii | (S.Watson) Luer | Orchidaceae | 5 |
| Trixis michuacana | Lex. | Asteraceae | 5 |
| Vailia anomala | (Brandegee) W.D.Stevens | Apocynaceae | 5 |
| Vernonia arborescens | (L.) Sw. | Asteraceae | 5 |
| Villadia misera | (Lindl.) R.T.Clausen | Crassulaceae | 5 |
| Viola grahamii | Benth. | Violaceae | 5 |
| Viola hookeriana | Kunth | Violaceae | 5 |
| Wimmeria pubescens | Radlk. | Celastraceae | 5 |
| Ximenia parviflora | Benth. | Olacaceae | 5 |
| Acourtia tomentosa | (Brandegee) Reveal & R.M.King | Asteraceae | 4 |
| Adenophyllum porophyllum | (Cav.) Hemsl. | Asteraceae | 4 |
| Agave filifera | Salm-Dyck | Asparagaceae | 4 |
| Agave macroacantha | Zucc. | Asparagaceae | 4 |
| Agave pubescens | Regel & Ortgies | Asparagaceae | 4 |
| Anisacanthus pumilus | (F.Dietr.) Nees | Acanthaceae | 4 |
| Antigonon flavescens | S.Watson | Polygonaceae | 4 |
| Aphelandra lineariloba | Leonard | Acanthaceae | 4 |
| Archibaccharis schiedeana | (Benth.) J.D.Jacks. | Asteraceae | 4 |
| Ardisia bracteosa | A.DC. | Primulaceae | 4 |
| Ardisia paschalis | Donn.Sm. | Primulaceae | 4 |
| Arracacia nelsonii | J.M.Coult. & Rose | Apiaceae | 4 |
| Arthrostemma alatum | Triana | Melastomataceae | 4 |
| Asclepias circinalis | (Decne.) Woodson | Apocynaceae | 4 |
| Athyrium dombeyi | Desv. | Athyriaceae | 4 |
| Berberis gracilis | Hartw. ex Benth. | Berberidaceae | 4 |
| Besleria laxiflora | Benth. | Gesneriaceae | 4 |
| Bignonia potosina | (K.Schum. & Loes.) L.G.Lohmann | Bignoniaceae | 4 |
| Bouteloua simplex | Lag. | Poaceae | 4 |
| Bouvardia multiflora | (Cav.) Schult. & Schult.f. | Rubiaceae | 4 |
| Brickellia scoparia | A.Gray | Asteraceae | 4 |
| Brongniartia oligosperma | Baill. | Fabaceae | 4 |
| Bursera instabilis | McVaugh & Rzed. | Burseraceae | 4 |
| Calliandra tergemina | (L.) Benth. | Fabaceae | 4 |
| Campylocentrum micranthum | (Lindl.) Rolfe | Orchidaceae | 4 |
| Canavalia hirsutissima | J.D.Sauer | Fabaceae | 4 |
| Castilleja hirsuta | M.Martens & Galeotti | Orobanchaceae | 4 |
| Castilleja pectinata | M.Martens & Galeotti | Orobanchaceae | 4 |
| Catasetum laminatum | Lindl. | Orchidaceae | 4 |
| Chamaecrista diphylla | (L.) Greene | Fabaceae | 4 |
| Chaptalia lyratifolia | Burkart | Asteraceae | 4 |
| Chaptalia runcinata | Kunth | Asteraceae | 4 |
| Cionosicys macranthus | (Pittier) C.Jeffrey | Cucurbitaceae | 4 |
| Cissus cacuminis | Standl. | Vitaceae | 4 |
| Citharexylum mocinoi | D.Don | Verbenaceae | 4 |
| Clematis acapulcensis | Hook. & Arn. | Ranunculaceae | 4 |
| Clitoria mexicana | Link | Fabaceae | 4 |
| Cochlospermum palmatifidum | (DC.) Byng & Christenh. | Bixaceae | 4 |
| Coenoemersa volcanica | (Lindl.) R.González & Lizb.Hern. | Orchidaceae | 4 |
| Corallorhiza bulbosa | A.Rich. & Galeotti | Orchidaceae | 4 |
| Coryphantha elephantidens | (Lem.) Lem. | Cactaceae | 4 |
| Coulteria velutina | (Britton & Rose) Sotuyo & G.P.Lewis | Fabaceae | 4 |
| Critonia daleoides | DC. | Asteraceae | 4 |
| Ctenodon histrix | (Poir.) D.B.O.S.Cardoso, P.L.R.Moraes & H.C.Lima | Fabaceae | 4 |
| Cuphea heterophylla | Benth. | Lythraceae | 4 |
| Cuphea paucipetala | S.A.Graham | Lythraceae | 4 |
| Cyathula achyranthoides | (Kunth) Moq. | Amaranthaceae | 4 |
| Cynanchum ligulatum | (Benth.) Woodson | Apocynaceae | 4 |
| Dahlia atropurpurea | P.D.Sørensen | Asteraceae | 4 |
| Dalbergia glabra | (Mill.) Standl. | Fabaceae | 4 |
| Deiregyne rhombilabia | Garay | Orchidaceae | 4 |
| Deiregyne tenorioi | Soto Arenas & Salazar | Orchidaceae | 4 |
| Desmodium distortum | (Aubl.) J.F.Macbr. | Fabaceae | 4 |
| Dichaea squarrosa | Lindl. | Orchidaceae | 4 |
| Diphysa floribunda | Peyr. | Fabaceae | 4 |
| Diplazium striatastrum | Lellinger | Athyriaceae | 4 |
| Draba jorullensis | Kunth | Brassicaceae | 4 |
| Drymaria arenarioides | Humb. & Bonpl. ex Schult. | Caryophyllaceae | 4 |
| Echeveria pulidonis | E.Walther | Crassulaceae | 4 |
| Encyclia candollei | (Lindl.) Schltr. | Orchidaceae | 4 |
| Erythranthe pallens | (Greene) G.L.Nesom | Phrymaceae | 4 |
| Erythrina leptorhiza | Moc. & Sessé ex DC. | Fabaceae | 4 |
| Euphorbia furcillata | Kunth | Euphorbiaceae | 4 |
| Euphorbia ocymoidea | L. | Euphorbiaceae | 4 |
| Euphorbia rossiana | Pax | Euphorbiaceae | 4 |
| Ficus velutina | Humb. & Bonpl. ex Willd. | Moraceae | 4 |
| Gaga marginata | (Kunth) Fay W.Li & Windham | Pteridaceae | 4 |
| Garcinia intermedia | (Pittier) Hammel | Clusiaceae | 4 |
| Gaya minutiflora | Rose | Malvaceae | 4 |
| Gibasis pulchella | (Kunth) Raf. | Commelinaceae | 4 |
| Gonolobus fraternus | Schltdl. | Apocynaceae | 4 |
| Guardiola mexicana | Bonpl. | Asteraceae | 4 |
| Habenaria strictissima | Rchb.f. | Orchidaceae | 4 |
| Hechtia confusa | L.B.Sm. | Bromeliaceae | 4 |
| Heteranthera rotundifolia | (Kunth) Griseb. | Pontederiaceae | 4 |
| Hieracium schultzii | Fr. | Asteraceae | 4 |
| Ilex discolor | Hemsl. | Aquifoliaceae | 4 |
| Iostephane trilobata | Hemsl. | Asteraceae | 4 |
| Ipomoea hastigera | Kunth | Convolvulaceae | 4 |
| Ipomoea praecana | House | Convolvulaceae | 4 |
| Iresine arbuscula | Uline & W.L.Bray | Amaranthaceae | 4 |
| Jarilla heterophylla | (Cerv. ex La Llave) Rusby | Caricaceae | 4 |
| Lagascea heteropappus | Hemsl. | Asteraceae | 4 |
| Lasianthaea ceanothifolia | (Willd.) K.M.Becker | Asteraceae | 4 |
| Leucophyllum pringlei | (Greenm.) Standl. | Scrophulariaceae | 4 |
| Lonchocarpus eriocarinalis | Micheli | Fabaceae | 4 |
| Lucuma campechiana | Kunth | Sapotaceae | 4 |
| Lycianthes arrazolensis | (Coult. & Donn.Sm.) Bitter | Solanaceae | 4 |
| Lythrum gracile | Benth. | Lythraceae | 4 |
| Malaxis rosei | Ames | Orchidaceae | 4 |
| Mammillaria rhodantha | Link & Otto | Cactaceae | 4 |
| Manilkara chicle | (Pittier) Gilly | Sapotaceae | 4 |
| Maxillaria cucullata | Lindl. | Orchidaceae | 4 |
| Menodora coulteri | A.Gray | Oleaceae | 4 |
| Menodora helianthemoides | Bonpl. | Oleaceae | 4 |
| Miconia chrysoneura | Triana | Melastomataceae | 4 |
| Miconia formicosetosa | Michelang. | Melastomataceae | 4 |
| Mimosa lacerata | Rose | Fabaceae | 4 |
| Mirabilis sanguinea | Heimerl | Nyctaginaceae | 4 |
| Muhlenbergia cenchroides | (Humb. & Bonpl. ex Willd.) P.M.Peterson | Poaceae | 4 |
| Muhlenbergia macroura | (Kunth) Hitchc. | Poaceae | 4 |
| Muhlenbergia mutica | (Rupr. ex Galeotti) Hitchc. | Poaceae | 4 |
| Muhlenbergia ramulosa | (Kunth) Swallen | Poaceae | 4 |
| Myriopteris pringlei | (Davenp.) Grusz & Windham | Pteridaceae | 4 |
| Myrsine penduliflora | A.DC. | Primulaceae | 4 |
| Nectandra cuspidata | Nees & Mart. | Lauraceae | 4 |
| Nectandra hihua | (Ruiz & Pav.) Rohwer | Lauraceae | 4 |
| Opuntia velutina | F.A.C.Weber | Cactaceae | 4 |
| Ornithocephalus iridifolius | Rchb.f. | Orchidaceae | 4 |
| Orthosia angustifolia | (Turcz.) Liede & Meve | Apocynaceae | 4 |
| Orthrosanthus exsertus | (R.C.Foster) Ravenna | Iridaceae | 4 |
| Otopappus acuminatus | S.Watson | Asteraceae | 4 |
| Parablechnum schiedeanum | (Schltdl. ex C.Presl) Gasper & Salino | Blechnaceae | 4 |
| Pecluma struthionis | (L.) Boudrie, Cremers & Viane | Polypodiaceae | 4 |
| Pelexia funckiana | (A.Rich. & Galeotti) Schltr. | Orchidaceae | 4 |
| Peniocereus viperinus | (F.A.C.Weber) Kreuz. | Cactaceae | 4 |
| Penstemon hartwegii | Benth. | Plantaginaceae | 4 |
| Peperomia claytonioides | Kunth | Piperaceae | 4 |
| Persea liebmannii | Mez | Lauraceae | 4 |
| Philodendron inaequilaterum | Liebm. | Araceae | 4 |
| Phoradendron dipterum | Eichler | Santalaceae | 4 |
| Phoradendron lanceolatum | Engelm. ex A.Gray | Santalaceae | 4 |
| Phyllostylon rhamnoides | (J.Poiss.) Taub. | Ulmaceae | 4 |
| Pitcairnia karwinskyana | Schult. & Schult.f. | Bromeliaceae | 4 |
| Poeppigia procera | (Poepp. ex Spreng.) C.Presl | Fabaceae | 4 |
| Polaskia chende | (Rol.-Goss.) A.C.Gibson & K.E.Horak | Cactaceae | 4 |
| Polyphlebium capillaceum | (L.) Ebihara & Dubuisson | Hymenophyllaceae | 4 |
| Potentilla rubra | Willd. ex D.F.K.Schltdl. | Rosaceae | 4 |
| Prunus zinggii | Standl. | Rosaceae | 4 |
| Quercus cortesii | Liebm. | Fagaceae | 4 |
| Quercus glabrescens | Benth. | Fagaceae | 4 |
| Quercus mexicana | Bonpl. | Fagaceae | 4 |
| Rubus eriocarpus | Liebm. | Rosaceae | 4 |
| Ruehssia zimapanica | (Hemsl.) L.O.Alvarado | Apocynaceae | 4 |
| Russelia tenuis | Lundell | Plantaginaceae | 4 |
| Sagittaria guayanensis | Kunth | Alismataceae | 4 |
| Sanvitalia fruticosa | Hemsl. | Asteraceae | 4 |
| Sceptridium schaffneri | (Underw.) Lyon | Ophioglossaceae | 4 |
| Schiedeella transversalis | (A.Rich. & Galeotti) Schltr. | Orchidaceae | 4 |
| Schizachyrium condensatum | (Kunth) Nees | Poaceae | 4 |
| Schoenocaulon tenorioi | Frame | Melanthiaceae | 4 |
| Sedum allantoides | Rose | Crassulaceae | 4 |
| Sedum bourgaei | Hemsl. | Crassulaceae | 4 |
| Selaginella stenophylla | A.Braun | Selaginellaceae | 4 |
| Senecio prionopterus | B.L.Rob. & Greenm. | Asteraceae | 4 |
| Senna foetidissima | (Ruiz & Pav. ex G.Don) H.S.Irwin & Barneby | Fabaceae | 4 |
| Sicydium tamnifolium | Cogn. | Cucurbitaceae | 4 |
| Sidastrum paniculatum | (L.) Fryxell | Malvaceae | 4 |
| Sigesbeckia agrestis | Poepp. & Endl. | Asteraceae | 4 |
| Simsia annectens | S.F.Blake | Asteraceae | 4 |
| Sinclairia palmeri | (A.Gray) B.L.Turner | Asteraceae | 4 |
| Sisyrinchium arizonicum | Rothr. | Iridaceae | 4 |
| Spathacanthus hahnianus | Baill. | Acanthaceae | 4 |
| Spermacoce tenuior | L. | Rubiaceae | 4 |
| Staphylea insignis | (Tul.) Byng & Christenh. | Staphyleaceae | 4 |
| Stegnosperma cubense | A.Rich. | Stegnospermataceae | 4 |
| Stevia aschenborniana | Sch.Bip. | Asteraceae | 4 |
| Stevia incognita | Grashoff | Asteraceae | 4 |
| Stevia origanoides | Kunth | Asteraceae | 4 |
| Stillingia acutifolia | (Benth.) Benth. & Hook.f. ex Hemsl. | Euphorbiaceae | 4 |
| Stylosanthes humilis | Kunth | Fabaceae | 4 |
| Tapirira mexicana | Marchand | Anacardiaceae | 4 |
| Tauschia decumbens | J.M.Coult. & Rose | Apiaceae | 4 |
| Thalictrum strigillosum | Hemsl. | Ranunculaceae | 4 |
| Tillandsia pueblensis | L.B.Sm. | Bromeliaceae | 4 |
| Trichocentrum cavendishianum | (Bateman) M.W.Chase & N.H.Williams | Orchidaceae | 4 |
| Trichosalpinx ciliaris | (Lindl.) Luer | Orchidaceae | 4 |
| Valeriana urticifolia | Kunth | Caprifoliaceae | 4 |
| Verbena delticola | Small ex Perry | Verbenaceae | 4 |
| Verbesina abscondita | Klatt | Asteraceae | 4 |
| Verbesina gigantea | Jacq. | Asteraceae | 4 |
| Verbesina perymenioides | Sch.Bip. ex Klatt | Asteraceae | 4 |
| Viguiera sphaerocephala | Hemsl. | Asteraceae | 4 |
| Viola guatemalensis | W.Becker | Violaceae | 4 |
| Wissadula periplocifolia | (L.) Thwaites | Malvaceae | 4 |
| Xylosma panamensis | Turcz. | Salicaceae | 4 |
| Zanthoxylum foliolosum | Donn.Sm. | Rutaceae | 4 |
| Zanthoxylum limoncello | Planch. & Oerst. ex Triana & Planch. | Rutaceae | 4 |
| Acalypha adenostachya | Müll.Arg. | Euphorbiaceae | 3 |
| Acalypha membranacea | A.Rich. | Euphorbiaceae | 3 |
| Achimenes glabrata | (Zucc.) Fritsch | Gesneriaceae | 3 |
| Achimenes patens | Benth. | Gesneriaceae | 3 |
| Adelia barbinervis | Cham. & Schltdl. | Euphorbiaceae | 3 |
| Adiantum deflectens | Mart. | Pteridaceae | 3 |
| Agave coetocapnia | (M.Roem.) Govaerts & Thiede | Asparagaceae | 3 |
| Agave ghiesbreghtii | Verschaff. | Asparagaceae | 3 |
| Allobriquetia spicata | (Kunth) Bovini | Malvaceae | 3 |
| Alternanthera lanceolata | (Benth.) Schinz | Amaranthaceae | 3 |
| Amyris balsamifera | L. | Rutaceae | 3 |
| Andropogon tener | (Nees) Kunth | Poaceae | 3 |
| Anoda albiflora | Fryxell | Malvaceae | 3 |
| Anredera ramosa | (Moq.) Eliasson | Basellaceae | 3 |
| Archibaccharis hieracioides | S.F.Blake | Asteraceae | 3 |
| Asplundia liebmannii | Harling | Cyclanthaceae | 3 |
| Astranthium orthopodum | Larsen | Asteraceae | 3 |
| Barroetea subuligera | A.Gray | Asteraceae | 3 |
| Bauhinia pringlei | S.Watson | Fabaceae | 3 |
| Bdallophytum andrieuxii | Eichler | Cytinaceae | 3 |
| Billia hippocastanum | Peyr. | Sapindaceae | 3 |
| Bletia adenocarpa | Rchb.f. | Orchidaceae | 3 |
| Bletia macristhmochila | Greenm. | Orchidaceae | 3 |
| Bravaisia integerrima | (Spreng.) Standl. | Acanthaceae | 3 |
| Brongniartia lupinoides | (Kunth) Taub. | Fabaceae | 3 |
| Bruceholstia sidifolia | (M.Martens & Galeotti) L.O.Alvarado | Apocynaceae | 3 |
| Brunellia mexicana | Standl. | Brunelliaceae | 3 |
| Bursera roseana | Rzed., Calderón & Medina | Burseraceae | 3 |
| Carminatia recondita | McVaugh | Asteraceae | 3 |
| Cedrela oaxacensis | C.DC. & Rose | Meliaceae | 3 |
| Cephalocereus macrocephalus | F.A.C.Weber ex K.Schum. | Cactaceae | 3 |
| Cerastium vulcanicum | Schltdl. | Caryophyllaceae | 3 |
| Cercocarpus fothergilloides | Kunth | Rosaceae | 3 |
| Cestrum glanduliferum | Kerber ex Francey | Solanaceae | 3 |
| Cestrum racemosum | Ruiz & Pav. | Solanaceae | 3 |
| Chamaedorea sartorii | Liebm. | Arecaceae | 3 |
| Chamaedorea schiedeana | Mart. | Arecaceae | 3 |
| Chenopodium desiccatum | A.Nelson | Chenopodiaceae | 3 |
| Citharexylum racemosum | Sessé & Moc. | Verbenaceae | 3 |
| Clematis grossa | Benth. | Ranunculaceae | 3 |
| Clematis rhodocarpa | Rose | Ranunculaceae | 3 |
| Cleome magnifica | Briq. | Cleomaceae | 3 |
| Clitoria polystachya | Benth. | Fabaceae | 3 |
| Cobaea stipularis | Benth. | Polemoniaceae | 3 |
| Coccocypselum guianense | (Aubl.) K.Schum. | Rubiaceae | 3 |
| Coccoloba spicata | Lundell | Polygonaceae | 3 |
| Coenoemersa limosa | (Lindl.) R.González & Lizb.Hern. | Orchidaceae | 3 |
| Corchorus hirtus | L. | Malvaceae | 3 |
| Crotalaria bupleurifolia | Schltdl. & Cham. | Fabaceae | 3 |
| Croton morifolius | Willd. | Euphorbiaceae | 3 |
| Crusea calocephala | DC. | Rubiaceae | 3 |
| Cuphea calaminthifolia | Schltdl. | Lythraceae | 3 |
| Cuscuta jalapensis | Schltdl. | Convolvulaceae | 3 |
| Cyathea fulva | (M.Martens & Galeotti) Fée | Cyatheaceae | 3 |
| Cyperus tenerrimus | J.Presl & C.Presl | Cyperaceae | 3 |
| Dalea carthagenensis | (Jacq.) J.F.Macbr. | Fabaceae | 3 |
| Dalembertia populifolia | Baill. | Euphorbiaceae | 3 |
| Daucus montanus | Humb. & Bonpl. ex Schult. | Apiaceae | 3 |
| Deppea hintonii | Bullock | Rubiaceae | 3 |
| Descurainia streptocarpa | (E.Fourn.) O.E.Schulz | Brassicaceae | 3 |
| Dianthera pectoralis | (Jacq.) J.F.Gmel. | Acanthaceae | 3 |
| Dictyanthus ceratopetalus | Donn.Sm. | Apocynaceae | 3 |
| Diectomis fastigiata | (Sw.) P.Beauv. | Poaceae | 3 |
| Diplazium urticifolium | Christ | Athyriaceae | 3 |
| Echeveria amoena | De Smet ex É.Morren | Crassulaceae | 3 |
| Echeveria coccinea | (Cav.) DC. | Crassulaceae | 3 |
| Echeveria waltheri | Moran & J.Meyrán | Crassulaceae | 3 |
| Echinochloa polystachya | (Kunth) Hitchc. | Poaceae | 3 |
| Elaphoglossum sartorii | (Liebm.) Mickel | Dryopteridaceae | 3 |
| Encyclia adenocaula | (Lex.) Schltr. | Orchidaceae | 3 |
| Epidendrum polyanthum | Lindl. | Orchidaceae | 3 |
| Erigeron versicolor | (Greenm.) G.L.Nesom | Asteraceae | 3 |
| Eryngium comosum | F.Delaroche | Apiaceae | 3 |
| Eryngium deppeanum | Cham. & Schltdl. | Apiaceae | 3 |
| Eryngium longifolium | Cav. | Apiaceae | 3 |
| Euphorbia alta | Norton | Euphorbiaceae | 3 |
| Euphorbia lancifolia | Schltdl. | Euphorbiaceae | 3 |
| Euphorbia sphaerorhiza | Benth. | Euphorbiaceae | 3 |
| Euploca humilis | (L.) Feuillet | Heliotropiaceae | 3 |
| Festuca livida | (Kunth) Willd. ex Spreng. | Poaceae | 3 |
| Forestiera durangensis | Standl. | Oleaceae | 3 |
| Furcraea longaeva | Karw. & Zucc. | Asparagaceae | 3 |
| Galium uncinulatum | DC. | Rubiaceae | 3 |
| Gentianella amarella | (L.) Börner | Gentianaceae | 3 |
| Gibasis venustula | (Kunth) D.R.Hunt | Commelinaceae | 3 |
| Gongylocarpus rubricaulis | Cham. & Schltdl. | Onagraceae | 3 |
| Gonolobus chloranthus | Schltdl. | Apocynaceae | 3 |
| Gonolobus niger | (Cav.) Schult. | Apocynaceae | 3 |
| Gouania polygama | (Jacq.) Urb. | Rhamnaceae | 3 |
| Gymnolaena oaxacana | (Greenm.) Rydb. | Asteraceae | 3 |
| Habenaria filifera | S.Watson | Orchidaceae | 3 |
| Hampea nutricia | Fryxell | Malvaceae | 3 |
| Hechtia matudae | L.B.Sm. | Bromeliaceae | 3 |
| Heliocarpus appendiculatus | Turcz. | Malvaceae | 3 |
| Heteropterys cotinifolia | A.Juss. | Malpighiaceae | 3 |
| Heterotoma lobelioides | Zucc. | Campanulaceae | 3 |
| Hibiscus elegans | Standl. | Malvaceae | 3 |
| Hirtella triandra | Sw. | Chrysobalanaceae | 3 |
| Hymenocallis acutifolia | (Herb.) Sweet | Amaryllidaceae | 3 |
| Hymenocallis harrisiana | Herb. | Amaryllidaceae | 3 |
| Hymenostephium tenue | (A.Gray) E.E.Schill. & Panero | Asteraceae | 3 |
| Iresine schaffneri | S.Watson | Amaranthaceae | 3 |
| Isochilus bracteatus | (Lex.) Espejo & López-Ferr. | Orchidaceae | 3 |
| Isochilus unilateralis | B.L.Rob. | Orchidaceae | 3 |
| Isocoma hartwegii | Greene | Asteraceae | 3 |
| Justicia amplifolia | T.F.Daniel | Acanthaceae | 3 |
| Justicia clinopodium | A.Gray ex Greenm. | Acanthaceae | 3 |
| Koanophyllon palmeri | (A.Gray) R.M.King & H.Rob. | Asteraceae | 3 |
| Lagascea rigida | (Cav.) Stuessy | Asteraceae | 3 |
| Lasiacis rhizophora | (E.Fourn.) Hitchc. ex Chase | Poaceae | 3 |
| Leucaena macrophylla | Benth. | Fabaceae | 3 |
| Licaria capitata | (Cham. & Schltdl.) Kosterm. | Lauraceae | 3 |
| Linum mexicanum | Kunth | Linaceae | 3 |
| Lippia oaxacana | B.L.Rob. & Greenm. | Verbenaceae | 3 |
| Lonchocarpus punctatus | Kunth | Fabaceae | 3 |
| Louteridium mexicanum | (Baill.) Standl. | Acanthaceae | 3 |
| Lyonia squamulosa | M.Martens & Galeotti | Ericaceae | 3 |
| Macroclinium lexarzanum | (Hágsater & R.González) Dodson | Orchidaceae | 3 |
| Malaxis streptopetala | (B.L.Rob. & Greenm.) Ames | Orchidaceae | 3 |
| Maranta gibba | Sm. | Marantaceae | 3 |
| Marcgravia mexicana | Gilg | Marcgraviaceae | 3 |
| Melpomene peruviana | (Desv.) Reider & R.C.Moran | Polypodiaceae | 3 |
| Mesadenus polyanthus | (Rchb.f.) Schltr. | Orchidaceae | 3 |
| Mexicania congesta | (Decne.) L.O.Alvarado & Lozada-Pérez | Apocynaceae | 3 |
| Miconia dodecandra | Cogn. | Melastomataceae | 3 |
| Miconia lateriflora | Cogn. | Melastomataceae | 3 |
| Mimosa ervendbergii | A.Gray | Fabaceae | 3 |
| Mollinedia viridiflora | Tul. | Monimiaceae | 3 |
| Morkillia mexicana | (Moc. & Sessé ex DC.) Rose & J.H.Painter | Zygophyllaceae | 3 |
| Muhlenbergia repens | (J.Presl) Hitchc. | Poaceae | 3 |
| Myriocarpa bifurca | Liebm. | Urticaceae | 3 |
| Myriocarpa cordifolia | Liebm. | Urticaceae | 3 |
| Nama undulata | Kunth | Namaceae | 3 |
| Nephrolepis undulata | (Afzel. ex Sw.) J.Sm. | Nephrolepidaceae | 3 |
| Notholaena affinis | (Mett.) T.Moore | Pteridaceae | 3 |
| Notylia orbicularis | A.Rich. & Galeotti | Orchidaceae | 3 |
| Oncidium maculatum | (Lindl.) Lindl. | Orchidaceae | 3 |
| Ophioglossum reticulatum | L. | Ophioglossaceae | 3 |
| Orthosia mexicana | (S.Watson) Liede & Meve | Apocynaceae | 3 |
| Oxalis lunulata | Zucc. | Oxalidaceae | 3 |
| Passiflora hahnii | (Fourn.) Mast. | Passifloraceae | 3 |
| Peltostigma pteleoides | (Hook.) Walp. | Rutaceae | 3 |
| Peperomia lanceolata | C.DC. | Piperaceae | 3 |
| Persea schiedeana | Nees | Lauraceae | 3 |
| Phaseolus ritensis | M.E.Jones | Fabaceae | 3 |
| Phoradendron nervosum | Oliv. | Santalaceae | 3 |
| Phymosia umbellata | (Cav.) Kearney | Malvaceae | 3 |
| Physalis coztomatl | Dunal | Solanaceae | 3 |
| Pinguicula acuminata | Benth. | Lentibulariaceae | 3 |
| Pitcairnia palmeri | S.Watson | Bromeliaceae | 3 |
| Polystemma fuscum | (Decne.) C.Cerv., S.Arias & L.O.Alvarado | Apocynaceae | 3 |
| Pombalia verbenacea | (Standl. & Steyerm.) H.E.Ballard & Paula-Souza | Violaceae | 3 |
| Porana nutans | (Choisy) O'Donell | Convolvulaceae | 3 |
| Prosthechea brassavolae | (Rchb.f.) W.E.Higgins | Orchidaceae | 3 |
| Prosthechea squalida | (Lex.) Soto Arenas & Salazar | Orchidaceae | 3 |
| Psacalium megaphyllum | Rydb. | Asteraceae | 3 |
| Pseudabutilon scabrum | (C.Presl) R.E.Fr. | Malvaceae | 3 |
| Pseudalcantarea grandis | (Schltdl.) Pinzón & Barfuss | Bromeliaceae | 3 |
| Pseudoeriocoma eminens | (Cav.) Romasch. | Poaceae | 3 |
| Pseudosmodingium virletii | (Baill.) Engl. | Anacardiaceae | 3 |
| Pteris pulchra | Schltdl. & Cham. | Pteridaceae | 3 |
| Pterolepis trichotoma | (Rottb.) Cogn. | Melastomataceae | 3 |
| Rhynchosia reticulata | (Sw.) DC. | Fabaceae | 3 |
| Ricoa leptophylla | (DC.) Duno & Torke | Fabaceae | 3 |
| Roldana jurgensenii | (Hemsl.) H.Rob. & Brettell | Asteraceae | 3 |
| Roupala montana | Aubl. | Proteaceae | 3 |
| Ruehssia coulteri | (Hemsl.) L.O.Alvarado | Apocynaceae | 3 |
| Ruellia geminiflora | Kunth | Acanthaceae | 3 |
| Salvia boegei | Ramamoorthy | Lamiaceae | 3 |
| Salvia candicans | M.Martens & Galeotti | Lamiaceae | 3 |
| Salvia guadalajarensis | Briq. | Lamiaceae | 3 |
| Salvia pubescens | Benth. | Lamiaceae | 3 |
| Scirpoides mexicana | (C.B.Clarke) Goetgh. ex C.S.Reid & J.R.Carter | Cyperaceae | 3 |
| Sedum napiferum | Peyr. | Crassulaceae | 3 |
| Selaginella harrisii | Underw. & Hieron. | Selaginellaceae | 3 |
| Senecio procumbens | Kunth | Asteraceae | 3 |
| Senecio stoechadiformis | DC. | Asteraceae | 3 |
| Setaria tenax | (Rich.) Desv. | Poaceae | 3 |
| Sideroxylon obtusifolium | (Roem. & Schult.) T.D.Penn. | Sapotaceae | 3 |
| Sideroxylon palmeri | (Rose) T.D.Penn. | Sapotaceae | 3 |
| Solanum stenophyllidium | Bitter | Solanaceae | 3 |
| Stelis platystylis | (Schltr.) Solano & Soto Arenas | Orchidaceae | 3 |
| Stelis villosa | (Knowles & Westc.) Pridgeon & M.W.Chase | Orchidaceae | 3 |
| Stellaria ovata | Willd. ex D.F.K.Schltdl. | Caryophyllaceae | 3 |
| Stevia pyrolifolia | Schltdl. | Asteraceae | 3 |
| Sticherus underwoodianus | (Maxon) Nakai | Gleicheniaceae | 3 |
| Styrax radians | P.W.Fritsch | Styracaceae | 3 |
| Tilia mexicana | Schltdl. | Malvaceae | 3 |
| Tillandsia kirchhoffiana | Wittm. | Bromeliaceae | 3 |
| Tournefortia calycina | Benth. | Heliotropiaceae | 3 |
| Trichogalium microphyllum | (A.Gray) Kadereit & Schneew. | Rubiaceae | 3 |
| Trimezia variegata | (M.Martens & Galeotti) Ravenna | Iridaceae | 3 |
| Vachellia bilimekii | (J.F.Macbr.) Seigler & Ebinger | Fabaceae | 3 |
| Viola humilis | Kunth | Violaceae | 3 |
| Viola umbraticola | Kunth | Violaceae | 3 |
| Wimmeria bartlettii | Lundell | Celastraceae | 3 |
| Wimmeria concolor | Schltdl. & Cham. | Celastraceae | 3 |
| Zaluzania megacephala | Sch.Bip. | Asteraceae | 3 |
| Zanthoxylum caribaeum | Lam. | Rutaceae | 3 |
| Zinnia haageana | Regel | Asteraceae | 3 |