| Abies concolor | (Gordon) Lindl. ex Hildebr. | Pinaceae | 8 |
| Abies lasiocarpa | (Hook.) Nutt. | Pinaceae | 8 |
| Abronia ammophila | Greene | Nyctaginaceae | 8 |
| Abronia elliptica | A.Nelson | Nyctaginaceae | 8 |
| Abronia fragrans | Nutt. ex Hook. | Nyctaginaceae | 8 |
| Abronia mellifera | Douglas ex Hook. | Nyctaginaceae | 8 |
| Abronia micrantha | Torr. | Nyctaginaceae | 8 |
| Acer glabrum | Torr. | Sapindaceae | 8 |
| Acer negundo | L. | Sapindaceae | 8 |
| Acer saccharum | Marshall | Sapindaceae | 8 |
| Achillea millefolium | L. | Asteraceae | 8 |
| Aconitum columbianum | Nutt. | Ranunculaceae | 8 |
| Actaea rubra | (Aiton) Willd. | Ranunculaceae | 8 |
| Adenocaulon bicolor | Hook. | Asteraceae | 8 |
| Adiantum aleuticum | (Rupr.) C.A.Paris | Pteridaceae | 8 |
| Adoxa moschatellina | L. | Viburnaceae | 8 |
| Agalinis tenuifolia | (Vahl) Raf. | Orobanchaceae | 8 |
| Agastache foeniculum | (Pursh) Kuntze | Lamiaceae | 8 |
| Agoseris aurantiaca | (Hook.) Greene | Asteraceae | 8 |
| Agoseris glauca | (Pursh) Raf. | Asteraceae | 8 |
| Agrimonia gryposepala | Wallr. | Rosaceae | 8 |
| Agrimonia striata | Michx. | Rosaceae | 8 |
| Agrostis scabra | Willd. | Poaceae | 8 |
| Alchemilla filicaulis | Buser | Rosaceae | 8 |
| Aliciella leptomeria | (A.Gray) J.M.Porter | Polemoniaceae | 8 |
| Aliciella pinnatifida | (Nutt. ex A.Gray) J.M.Porter | Polemoniaceae | 8 |
| Alisma gramineum | Lej. | Alismataceae | 8 |
| Alisma triviale | Pursh | Alismataceae | 8 |
| Allium acuminatum | Hook. | Amaryllidaceae | 8 |
| Allium brandegeei | S.Watson | Amaryllidaceae | 8 |
| Allium brevistylum | S.Watson | Amaryllidaceae | 8 |
| Allium cernuum | Roth | Amaryllidaceae | 8 |
| Allium geyeri | S.Watson | Amaryllidaceae | 8 |
| Allium schoenoprasum | L. | Amaryllidaceae | 8 |
| Allium textile | A.Nelson & J.F.Macbr. | Amaryllidaceae | 8 |
| Alnus alnobetula | (Ehrh.) K.Koch | Betulaceae | 8 |
| Alnus incana | (L.) Moench | Betulaceae | 8 |
| Alopecurus aequalis | Sobol. | Poaceae | 8 |
| Alopecurus carolinianus | Walter | Poaceae | 8 |
| Alopecurus magellanicus | Lam. | Poaceae | 8 |
| Ambrosia acanthicarpa | Hook. | Asteraceae | 8 |
| Ambrosia artemisiifolia | L. | Asteraceae | 8 |
| Ambrosia psilostachya | DC. | Asteraceae | 8 |
| Ambrosia trifida | L. | Asteraceae | 8 |
| Amelanchier alnifolia | (Nutt.) Nutt. ex M.Roem. | Rosaceae | 8 |
| Amelanchier utahensis | Koehne | Rosaceae | 8 |
| Ammannia robusta | Heer & Regel | Lythraceae | 8 |
| Amorpha canescens | Pursh | Fabaceae | 8 |
| Amorpha fruticosa | L. | Fabaceae | 8 |
| Amphiscirpus nevadensis | (S.Watson) Oteng-Yeb. | Cyperaceae | 8 |
| Anaphalis margaritacea | (L.) Benth. & Hook.f. | Asteraceae | 8 |
| Andropogon hallii | Hack. | Poaceae | 8 |
| Androsace filiformis | Retz. | Primulaceae | 8 |
| Androsace lehmanniana | Spreng. | Primulaceae | 8 |
| Androsace montana | (A.Gray) Wendelbo | Primulaceae | 8 |
| Androsace occidentalis | Pursh | Primulaceae | 8 |
| Androsace septentrionalis | L. | Primulaceae | 8 |
| Androstephium breviflorum | S.Watson | Asparagaceae | 8 |
| Anemonastrum canadense | (L.) Mosyakin | Ranunculaceae | 8 |
| Anemonastrum zephyrum | (A.Nelson) Holub | Ranunculaceae | 8 |
| Anemone cylindrica | A.Gray | Ranunculaceae | 8 |
| Anemone lithophila | Rydb. | Ranunculaceae | 8 |
| Anemone multifida | Poir. | Ranunculaceae | 8 |
| Anemone parviflora | Michx. | Ranunculaceae | 8 |
| Anemone virginiana | L. | Ranunculaceae | 8 |
| Angelica ampla | A.Nelson | Apiaceae | 8 |
| Angelica arguta | Nutt. | Apiaceae | 8 |
| Angelica grayi | (J.M.Coult. & Rose) J.M.Coult. & Rose | Apiaceae | 8 |
| Angelica pinnata | S.Watson | Apiaceae | 8 |
| Angelica roseana | L.F.Hend. | Apiaceae | 8 |
| Antennaria anaphaloides | Rydb. | Asteraceae | 8 |
| Antennaria dimorpha | Torr. & A.Gray | Asteraceae | 8 |
| Antennaria howellii | Greene | Asteraceae | 8 |
| Antennaria lanata | Greene | Asteraceae | 8 |
| Antennaria luzuloides | Torr. & A.Gray | Asteraceae | 8 |
| Antennaria media | Greene | Asteraceae | 8 |
| Antennaria microphylla | Rydb. | Asteraceae | 8 |
| Antennaria monocephala | DC. | Asteraceae | 8 |
| Antennaria neglecta | Greene | Asteraceae | 8 |
| Antennaria parvifolia | Nutt. | Asteraceae | 8 |
| Antennaria pulcherrima | (Hook.) Greene | Asteraceae | 8 |
| Antennaria racemosa | Hook. | Asteraceae | 8 |
| Antennaria rosea | Greene | Asteraceae | 8 |
| Antennaria umbrinella | Rydb. | Asteraceae | 8 |
| Anthoxanthum nitens | (Weber) Y.Schouten & Veldkamp | Poaceae | 8 |
| Anticlea elegans | (Pursh) Rydb. | Melanthiaceae | 8 |
| Apocynum androsaemifolium | L. | Apocynaceae | 8 |
| Apocynum cannabinum | L. | Apocynaceae | 8 |
| Aquilegia brevistyla | Hook. | Ranunculaceae | 8 |
| Aquilegia coerulea | E.James | Ranunculaceae | 8 |
| Aquilegia flavescens | S.Watson | Ranunculaceae | 8 |
| Aquilegia formosa | Fisch. ex DC. | Ranunculaceae | 8 |
| Aquilegia jonesii | Parry | Ranunculaceae | 8 |
| Arabis eschscholtziana | Andrz. ex Ledeb. | Brassicaceae | 8 |
| Aralia nudicaulis | L. | Araliaceae | 8 |
| Arceuthobium americanum | Nutt. ex Engelm. | Santalaceae | 8 |
| Arceuthobium douglasii | Engelm. | Santalaceae | 8 |
| Arctostaphylos uva-ursi | (L.) Spreng. | Ericaceae | 8 |
| Arctous rubra | (Rehder & E.H.Wilson) Nakai | Ericaceae | 8 |
| Argemone hispida | A.Gray | Papaveraceae | 8 |
| Argemone polyanthemos | (Fedde) Ownbey | Papaveraceae | 8 |
| Argentina anserina | (L.) Rydb. | Rosaceae | 8 |
| Argyrochosma fendleri | (Kunze) Windham | Pteridaceae | 8 |
| Aristida oligantha | Michx. | Poaceae | 8 |
| Arnica chamissonis | Less. | Asteraceae | 8 |
| Arnica cordifolia | Hook. | Asteraceae | 8 |
| Arnica fulgens | Pursh | Asteraceae | 8 |
| Arnica gracilis | Rydb. | Asteraceae | 8 |
| Arnica lanceolata | Nutt. | Asteraceae | 8 |
| Arnica latifolia | Bong. | Asteraceae | 8 |
| Arnica lonchophylla | Greene | Asteraceae | 8 |
| Arnica longifolia | D.C.Eaton | Asteraceae | 8 |
| Arnica mollis | Hook. | Asteraceae | 8 |
| Arnica parryi | A.Gray | Asteraceae | 8 |
| Arnica rydbergii | Greene | Asteraceae | 8 |
| Arnica sororia | Greene | Asteraceae | 8 |
| Artemisia arbuscula | Nutt. | Asteraceae | 8 |
| Artemisia biennis | Willd. | Asteraceae | 8 |
| Artemisia campestris | L. | Asteraceae | 8 |
| Artemisia cana | Pursh | Asteraceae | 8 |
| Artemisia capitata | (Nutt.) Sòn.Garcia, Garnatje, McArthur, Pellicer, S.C.Sand. & Vallès-Xirau | Asteraceae | 8 |
| Artemisia dracunculus | L. | Asteraceae | 8 |
| Artemisia filifolia | Torr. | Asteraceae | 8 |
| Artemisia frigida | Willd. | Asteraceae | 8 |
| Artemisia longifolia | Nutt. | Asteraceae | 8 |
| Artemisia ludoviciana | Nutt. | Asteraceae | 8 |
| Artemisia michauxiana | Besser | Asteraceae | 8 |
| Artemisia norvegica | Fr. | Asteraceae | 8 |
| Artemisia nova | A.Nelson | Asteraceae | 8 |
| Artemisia nuttallii | (Torr. & A.Gray) Mosyakin, L.M.Shultz & G.V.Boiko | Asteraceae | 8 |
| Artemisia pedatifida | Nutt. | Asteraceae | 8 |
| Artemisia scopulorum | A.Gray | Asteraceae | 8 |
| Artemisia spiciformis | Osterh. | Asteraceae | 8 |
| Artemisia tridentata | Nutt. | Asteraceae | 8 |
| Artemisia tripartita | Rydb. | Asteraceae | 8 |
| Asclepias arenaria | Torr. | Apocynaceae | 8 |
| Asclepias cryptoceras | S.Watson | Apocynaceae | 8 |
| Asclepias engelmanniana | Woodson | Apocynaceae | 8 |
| Asclepias hallii | A.Gray | Apocynaceae | 8 |
| Asclepias incarnata | L. | Apocynaceae | 8 |
| Asclepias ovalifolia | Decne. | Apocynaceae | 8 |
| Asclepias pumila | (A.Gray) Vail | Apocynaceae | 8 |
| Asclepias speciosa | Torr. | Apocynaceae | 8 |
| Asclepias stenophylla | A.Gray | Apocynaceae | 8 |
| Asclepias subverticillata | (A.Gray) Vail | Apocynaceae | 8 |
| Asclepias viridiflora | Raf. | Apocynaceae | 8 |
| Askellia elegans | (Hook.) W.A.Weber | Asteraceae | 8 |
| Askellia pygmaea | (Ledeb.) Sennikov | Asteraceae | 8 |
| Aspidotis densa | (Brack.) Lellinger | Pteridaceae | 8 |
| Asplenium septentrionale | (L.) Hoffm. | Aspleniaceae | 8 |
| Asplenium trichomanes | L. | Aspleniaceae | 8 |
| Asplenium viride | Huds. | Aspleniaceae | 8 |
| Aster alpinus | L. | Asteraceae | 8 |
| Astragalus agrestis | Douglas ex G.Don | Fabaceae | 8 |
| Astragalus alpinus | L. | Fabaceae | 8 |
| Astragalus americanus | (Hook.) M.E.Jones | Fabaceae | 8 |
| Astragalus barrii | Barneby | Fabaceae | 8 |
| Astragalus bisulcatus | (Hook.) A.Gray | Fabaceae | 8 |
| Astragalus bodinii | E.Sheld. | Fabaceae | 8 |
| Astragalus calycosus | Torr. ex S.Watson | Fabaceae | 8 |
| Astragalus canadensis | L. | Fabaceae | 8 |
| Astragalus ceramicus | E.Sheld. | Fabaceae | 8 |
| Astragalus chamaeleuce | A.Gray | Fabaceae | 8 |
| Astragalus cibarius | E.Sheld. | Fabaceae | 8 |
| Astragalus convallarius | Greene | Fabaceae | 8 |
| Astragalus crassicarpus | Nutt. | Fabaceae | 8 |
| Astragalus drummondii | Douglas ex Hook. | Fabaceae | 8 |
| Astragalus eucosmus | B.L.Rob. | Fabaceae | 8 |
| Astragalus flavus | Nutt. | Fabaceae | 8 |
| Astragalus flexuosus | (Hook.) Douglas ex G.Don | Fabaceae | 8 |
| Astragalus gilviflorus | E.Sheld. | Fabaceae | 8 |
| Astragalus gracilis | Nutt. | Fabaceae | 8 |
| Astragalus hyalinus | M.E.Jones | Fabaceae | 8 |
| Astragalus kentrophyta | A.Gray | Fabaceae | 8 |
| Astragalus laxmannii | Jacq. | Fabaceae | 8 |
| Astragalus lentiginosus | Douglas ex Hook. | Fabaceae | 8 |
| Astragalus lotiflorus | Hook. | Fabaceae | 8 |
| Astragalus megacarpus | (Nutt.) A.Gray | Fabaceae | 8 |
| Astragalus miser | Douglas ex Hook. | Fabaceae | 8 |
| Astragalus missouriensis | Nutt. | Fabaceae | 8 |
| Astragalus mollissimus | Torr. | Fabaceae | 8 |
| Astragalus multiflorus | (Pursh) A.Gray | Fabaceae | 8 |
| Astragalus oreganus | Nutt. | Fabaceae | 8 |
| Astragalus parryi | A.Gray | Fabaceae | 8 |
| Astragalus pectinatus | (Hook.) Douglas ex G.Don | Fabaceae | 8 |
| Astragalus plattensis | Nutt. | Fabaceae | 8 |
| Astragalus platytropis | A.Gray | Fabaceae | 8 |
| Astragalus pubentissimus | Torr. & A.Gray | Fabaceae | 8 |
| Astragalus purshii | Douglas ex G.Don | Fabaceae | 8 |
| Astragalus racemosus | Pursh | Fabaceae | 8 |
| Astragalus robbinsii | (Oakes) A.Gray | Fabaceae | 8 |
| Astragalus sericoleucus | A.Gray | Fabaceae | 8 |
| Astragalus shortianus | Nutt. | Fabaceae | 8 |
| Astragalus simplicifolius | (Nutt.) A.Gray | Fabaceae | 8 |
| Astragalus spatulatus | E.Sheld. | Fabaceae | 8 |
| Astragalus tridactylicus | A.Gray | Fabaceae | 8 |
| Astragalus utahensis | (Torr.) Torr. & A.Gray | Fabaceae | 8 |
| Astragalus vexilliflexus | E.Sheld. | Fabaceae | 8 |
| Athyrium americanum | (Butters) Maxon | Athyriaceae | 8 |
| Atriplex argentea | Nutt. | Chenopodiaceae | 8 |
| Atriplex canescens | (Pursh) Nutt. | Chenopodiaceae | 8 |
| Atriplex confertifolia | (Torr. & Frém.) S.Watson | Chenopodiaceae | 8 |
| Atriplex patula | L. | Chenopodiaceae | 8 |
| Atriplex saccaria | S.Watson | Chenopodiaceae | 8 |
| Balsamorhiza incana | Nutt. | Asteraceae | 8 |
| Balsamorhiza macrophylla | Nutt. | Asteraceae | 8 |
| Barbarea orthoceras | Ledeb. | Brassicaceae | 8 |
| Beckmannia syzigachne | (Steud.) Fernald | Poaceae | 8 |
| Berberis repens | Lindl. | Berberidaceae | 8 |
| Berula erecta | (Huds.) Coville | Apiaceae | 8 |
| Betula glandulosa | Michx. | Betulaceae | 8 |
| Betula occidentalis | Hook. | Betulaceae | 8 |
| Betula papyrifera | Marshall | Betulaceae | 8 |
| Betula pumila | L. | Betulaceae | 8 |
| Bidens cernua | L. | Asteraceae | 8 |
| Bidens frondosa | L. | Asteraceae | 8 |
| Bidens tripartita | L. | Asteraceae | 8 |
| Bidens vulgata | Greene | Asteraceae | 8 |
| Blitum capitatum | L. | Chenopodiaceae | 8 |
| Blitum nuttallianum | Schult. | Chenopodiaceae | 8 |
| Boechera angustifolia | (Nutt.) Dorn | Brassicaceae | 8 |
| Boechera divaricarpa | (A.Nelson) Á.Löve & D.Löve | Brassicaceae | 8 |
| Boechera formosa | (Greene) Windham & Al-Shehbaz | Brassicaceae | 8 |
| Boechera grahamii | (Lehm.) Windham & Al-Shehbaz | Brassicaceae | 8 |
| Boechera lemmonii | (S.Watson) W.A.Weber | Brassicaceae | 8 |
| Boechera pauciflora | (Nutt.) Windham & Al-Shehbaz | Brassicaceae | 8 |
| Boechera pendulina | (Greene) W.A.Weber | Brassicaceae | 8 |
| Boechera pendulocarpa | (A.Nelson) Windham & Al-Shehbaz | Brassicaceae | 8 |
| Boechera perennans | (S.Watson) W.A.Weber | Brassicaceae | 8 |
| Boechera retrofracta | (Graham) Á.Löve & D.Löve | Brassicaceae | 8 |
| Bolboschoenus maritimus | (L.) Palla | Cyperaceae | 8 |
| Botrychium ascendens | W.H.Wagner | Ophioglossaceae | 8 |
| Botrychium campestre | W.H.Wagner & Farrar | Ophioglossaceae | 8 |
| Botrychium crenulatum | W.H.Wagner | Ophioglossaceae | 8 |
| Botrychium lanceolatum | (Gmel.) Ångstr. | Ophioglossaceae | 8 |
| Botrychium minganense | Vict. | Ophioglossaceae | 8 |
| Botrychium pinnatum | H.St.John | Ophioglossaceae | 8 |
| Botrychium simplex | E.Hitchc. | Ophioglossaceae | 8 |
| Botrypus virginianus | (L.) Michx. | Ophioglossaceae | 8 |
| Bouteloua curtipendula | (Michx.) Torr. | Poaceae | 8 |
| Bouteloua dactyloides | (Nutt.) Columbus | Poaceae | 8 |
| Bouteloua eriopoda | (Torr.) Torr. | Poaceae | 8 |
| Bouteloua gracilis | (Kunth) Lag. ex Griffiths | Poaceae | 8 |
| Bouteloua hirsuta | Lag. | Poaceae | 8 |
| Braya humilis | (C.A.Mey.) B.L.Rob. | Brassicaceae | 8 |
| Brickellia grandiflora | Nutt. | Asteraceae | 8 |
| Brickellia microphylla | (Nutt.) A.Gray | Asteraceae | 8 |
| Brickellia oblongifolia | Nutt. | Asteraceae | 8 |
| Bromus ciliatus | L. | Poaceae | 8 |
| Bromus porteri | (Coult.) Nash | Poaceae | 8 |
| Bromus pubescens | Muhl. ex Willd. | Poaceae | 8 |
| Bromus pumpellianus | Scribn. | Poaceae | 8 |
| Bromus vulgaris | (Hook.) Shear | Poaceae | 8 |
| Bupleurum americanum | J.M.Coult. & Rose | Apiaceae | 8 |
| Calamagrostis canadensis | (Michx.) P.Beauv. | Poaceae | 8 |
| Calamagrostis inexpansa | A.Gray | Poaceae | 8 |
| Calamagrostis montanensis | (Scribn.) Scribn. ex Vasey | Poaceae | 8 |
| Calamagrostis purpurascens | R.Br. | Poaceae | 8 |
| Calamagrostis rubescens | Buckley | Poaceae | 8 |
| Calamagrostis stricta | (Timm) Koeler | Poaceae | 8 |
| Callitriche hermaphroditica | L. | Plantaginaceae | 8 |
| Callitriche heterophylla | Pursh | Plantaginaceae | 8 |
| Callitriche palustris | L. | Plantaginaceae | 8 |
| Calochortus apiculatus | Baker | Liliaceae | 8 |
| Calochortus eurycarpus | S.Watson | Liliaceae | 8 |
| Calochortus gunnisonii | S.Watson | Liliaceae | 8 |
| Calochortus nuttallii | Torr. | Liliaceae | 8 |
| Caltha chionophila | Greene | Ranunculaceae | 8 |
| Calypso bulbosa | (L.) Oakes | Orchidaceae | 8 |
| Calystegia sepium | (L.) R.Br. | Convolvulaceae | 8 |
| Camassia quamash | (Pursh) Greene | Asparagaceae | 8 |
| Camissonia parvula | (Nutt. ex Torr. & A.Gray) P.H.Raven | Onagraceae | 8 |
| Campanula parryi | A.Gray | Campanulaceae | 8 |
| Campanula petiolata | A.DC. | Campanulaceae | 8 |
| Cardamine breweri | S.Watson | Brassicaceae | 8 |
| Cardamine cordifolia | A.Gray | Brassicaceae | 8 |
| Cardamine oligosperma | Nutt. | Brassicaceae | 8 |
| Cardamine pensylvanica | Muhl. ex Willd. | Brassicaceae | 8 |
| Carex alascana | Boeckeler | Cyperaceae | 8 |
| Carex aquatilis | Wahlenb. | Cyperaceae | 8 |
| Carex atherodes | Spreng. | Cyperaceae | 8 |
| Carex athrostachya | Olney | Cyperaceae | 8 |
| Carex aurea | Nutt. | Cyperaceae | 8 |
| Carex bebbii | (L.H.Bailey) Olney ex Fernald | Cyperaceae | 8 |
| Carex bella | L.H.Bailey | Cyperaceae | 8 |
| Carex blanda | Dewey | Cyperaceae | 8 |
| Carex brevior | (Dewey) Mack. ex Lunell | Cyperaceae | 8 |
| Carex brunnescens | (Pers.) Poir. | Cyperaceae | 8 |
| Carex buxbaumii | Wahlenb. | Cyperaceae | 8 |
| Carex canescens | L. | Cyperaceae | 8 |
| Carex capillaris | L. | Cyperaceae | 8 |
| Carex concinna | R.Br. | Cyperaceae | 8 |
| Carex crawei | Dewey ex Torr. | Cyperaceae | 8 |
| Carex cusickii | Mack. | Cyperaceae | 8 |
| Carex deflexa | Hornem. | Cyperaceae | 8 |
| Carex deweyana | Schwein. | Cyperaceae | 8 |
| Carex diandra | Schrank | Cyperaceae | 8 |
| Carex disperma | Dewey | Cyperaceae | 8 |
| Carex douglasii | Boott | Cyperaceae | 8 |
| Carex duriuscula | C.A.Mey. | Cyperaceae | 8 |
| Carex ebenea | Rydb. | Cyperaceae | 8 |
| Carex eburnea | Boott | Cyperaceae | 8 |
| Carex echinata | Murray | Cyperaceae | 8 |
| Carex elynoides | Holm | Cyperaceae | 8 |
| Carex emoryi | Dewey | Cyperaceae | 8 |
| Carex engelmannii | L.H.Bailey | Cyperaceae | 8 |
| Carex filifolia | Nutt. | Cyperaceae | 8 |
| Carex garberi | Fernald | Cyperaceae | 8 |
| Carex granularis | Muhl. ex Willd. | Cyperaceae | 8 |
| Carex gravida | L.H.Bailey | Cyperaceae | 8 |
| Carex haydeniana | Olney | Cyperaceae | 8 |
| Carex heteroneura | W.Boott | Cyperaceae | 8 |
| Carex hoodii | Boott | Cyperaceae | 8 |
| Carex hystericina | Muhl. ex Willd. | Cyperaceae | 8 |
| Carex idahoa | L.H.Bailey | Cyperaceae | 8 |
| Carex illota | L.H.Bailey | Cyperaceae | 8 |
| Carex incurviformis | Mack. | Cyperaceae | 8 |
| Carex inops | L.H.Bailey | Cyperaceae | 8 |
| Carex interior | L.H.Bailey | Cyperaceae | 8 |
| Carex kelloggii | W.Boott | Cyperaceae | 8 |
| Carex lachenalii | Schkuhr | Cyperaceae | 8 |
| Carex laeviculmis | Meinsh. | Cyperaceae | 8 |
| Carex leptalea | Wahlenb. | Cyperaceae | 8 |
| Carex livida | (Wahlenb.) Willd. | Cyperaceae | 8 |
| Carex luzulina | Olney | Cyperaceae | 8 |
| Carex macloviana | d'Urv. | Cyperaceae | 8 |
| Carex microglochin | Wahlenb. | Cyperaceae | 8 |
| Carex micropoda | C.A.Mey. | Cyperaceae | 8 |
| Carex microptera | Mack. | Cyperaceae | 8 |
| Carex myosuroides | Vill. | Cyperaceae | 8 |
| Carex nardina | (Hornem.) Fr. | Cyperaceae | 8 |
| Carex neurophora | Mack. | Cyperaceae | 8 |
| Carex nigricans | C.A.Mey. | Cyperaceae | 8 |
| Carex nova | L.H.Bailey | Cyperaceae | 8 |
| Carex occidentalis | L.H.Bailey | Cyperaceae | 8 |
| Carex pachystachya | Cham. ex Steud. | Cyperaceae | 8 |
| Carex peckii | Howe | Cyperaceae | 8 |
| Carex pellita | Muhl. ex Willd. | Cyperaceae | 8 |
| Carex petasata | Dewey | Cyperaceae | 8 |
| Carex phaeocephala | Piper | Cyperaceae | 8 |
| Carex plectocarpa | F.J.Herm. | Cyperaceae | 8 |
| Carex praegracilis | W.Boott | Cyperaceae | 8 |
| Carex praticola | Rydb. | Cyperaceae | 8 |
| Carex raynoldsii | Dewey | Cyperaceae | 8 |
| Carex retrorsa | Schwein. | Cyperaceae | 8 |
| Carex richardsonii | R.Br. | Cyperaceae | 8 |
| Carex rosea | Willd. | Cyperaceae | 8 |
| Carex rossii | Boott | Cyperaceae | 8 |
| Carex rupestris | All. | Cyperaceae | 8 |
| Carex sartwellii | Dewey | Cyperaceae | 8 |
| Carex scirpoidea | Michx. | Cyperaceae | 8 |
| Carex siccata | Dewey | Cyperaceae | 8 |
| Carex simpliciuscula | Wahlenb. | Cyperaceae | 8 |
| Carex spectabilis | Dewey | Cyperaceae | 8 |
| Carex sprengelii | Dewey ex Spreng. | Cyperaceae | 8 |
| Carex stevenii | (Holm) Kalela | Cyperaceae | 8 |
| Carex stipata | Muhl. ex Willd. | Cyperaceae | 8 |
| Carex subnigricans | Stacey | Cyperaceae | 8 |
| Carex tahoensis | Smiley | Cyperaceae | 8 |
| Carex tenera | Dewey | Cyperaceae | 8 |
| Carex utriculata | Boott | Cyperaceae | 8 |
| Carex vallicola | Dewey | Cyperaceae | 8 |
| Carex vesicaria | L. | Cyperaceae | 8 |
| Carex vulpinoidea | Michx. | Cyperaceae | 8 |
| Castilleja angustifolia | (Nutt.) G.Don | Orobanchaceae | 8 |
| Castilleja applegatei | Fernald | Orobanchaceae | 8 |
| Castilleja chromosa | A.Nelson | Orobanchaceae | 8 |
| Castilleja crista-galli | Rydb. | Orobanchaceae | 8 |
| Castilleja cusickii | Greenm. | Orobanchaceae | 8 |
| Castilleja flava | S.Watson | Orobanchaceae | 8 |
| Castilleja linariifolia | Benth. | Orobanchaceae | 8 |
| Castilleja miniata | Douglas ex Benth. | Orobanchaceae | 8 |
| Castilleja minor | (A.Gray) A.Gray | Orobanchaceae | 8 |
| Castilleja pallescens | (A.Gray) Greenm. | Orobanchaceae | 8 |
| Castilleja pilosa | (S.Watson) Rydb. | Orobanchaceae | 8 |
| Castilleja pulchella | Rydb. | Orobanchaceae | 8 |
| Castilleja rhexiifolia | Rydb. | Orobanchaceae | 8 |
| Castilleja septentrionalis | Lindl. | Orobanchaceae | 8 |
| Castilleja sessiliflora | Pursh | Orobanchaceae | 8 |
| Catabrosa aquatica | (L.) P.Beauv. | Poaceae | 8 |
| Ceanothus fendleri | A.Gray | Rhamnaceae | 8 |
| Ceanothus velutinus | Douglas | Rhamnaceae | 8 |
| Celastrus scandens | L. | Celastraceae | 8 |
| Celtis occidentalis | L. | Cannabaceae | 8 |
| Celtis reticulata | Torr. | Cannabaceae | 8 |
| Cerastium beeringianum | Cham. & Schltdl. | Caryophyllaceae | 8 |
| Cerastium brachypodum | (Engelm. ex A.Gray) B.L.Rob. | Caryophyllaceae | 8 |
| Cerastium nutans | Raf. | Caryophyllaceae | 8 |
| Ceratophyllum demersum | L. | Ceratophyllaceae | 8 |
| Cercocarpus intricatus | S.Watson | Rosaceae | 8 |
| Cercocarpus ledifolius | Nutt. | Rosaceae | 8 |
| Cercocarpus montanus | Raf. | Rosaceae | 8 |
| Chaenactis douglasii | Hook. & Arn. | Asteraceae | 8 |
| Chaenactis stevioides | Hook. & Arn. | Asteraceae | 8 |
| Chaetopappa ericoides | (Torr.) G.L.Nesom | Asteraceae | 8 |
| Chamaechaenactis scaposa | Rydb. | Asteraceae | 8 |
| Chamaerhodos erecta | (L.) Bunge | Rosaceae | 8 |
| Chenopodium atrovirens | Rydb. | Chenopodiaceae | 8 |
| Chenopodium berlandieri | Moq. | Chenopodiaceae | 8 |
| Chenopodium fremontii | S.Watson | Chenopodiaceae | 8 |
| Chenopodium incanum | (S.Watson) A.Heller | Chenopodiaceae | 8 |
| Chenopodium leptophyllum | (Nutt. ex Moq.) B.D.Jacks. | Chenopodiaceae | 8 |
| Chenopodium rubrum | L. | Chenopodiaceae | 8 |
| Cherleria obtusiloba | (Rydb.) A.J.Moore & Dillenb. | Caryophyllaceae | 8 |
| Chimaphila umbellata | (L.) W.P.C.Barton | Ericaceae | 8 |
| Chionophila jamesii | Benth. | Plantaginaceae | 8 |
| Chloris verticillata | Nutt. | Poaceae | 8 |
| Chrysopsis villosa | (Pursh) Nutt. ex DC. | Asteraceae | 8 |
| Chrysothamnus greenei | (A.Gray) Greene | Asteraceae | 8 |
| Chrysothamnus viscidiflorus | Nutt. | Asteraceae | 8 |
| Chylismia scapoidea | (Torr. & A.Gray) Small | Onagraceae | 8 |
| Cicuta bulbifera | L. | Apiaceae | 8 |
| Cicuta douglasii | J.M.Coult. & Rose | Apiaceae | 8 |
| Cicuta maculata | L. | Apiaceae | 8 |
| Cinna latifolia | (Trevir. ex Göpp.) Griseb. | Poaceae | 8 |
| Circaea alpina | L. | Onagraceae | 8 |
| Circaea canadensis | (L.) Hill | Onagraceae | 8 |
| Cirsium canescens | Nutt. | Asteraceae | 8 |
| Cirsium cymosum | (Greene) J.T.Howell | Asteraceae | 8 |
| Cirsium drummondii | Torr. & A.Gray | Asteraceae | 8 |
| Cirsium eatonii | (A.Gray) B.L.Rob. | Asteraceae | 8 |
| Cirsium flodmanii | Arthur | Asteraceae | 8 |
| Cirsium foliosum | DC. | Asteraceae | 8 |
| Cirsium hookerianum | Nutt. | Asteraceae | 8 |
| Cirsium ochrocentrum | A.Gray | Asteraceae | 8 |
| Cirsium scariosum | Nutt. | Asteraceae | 8 |
| Cirsium undulatum | (Nutt.) Spreng. | Asteraceae | 8 |
| Cistanthe rosea | (S.Watson) Hershk. | Montiaceae | 8 |
| Cistanthe umbellata | (Torr.) Hershk. | Montiaceae | 8 |
| Clarkia pulchella | Pursh | Onagraceae | 8 |
| Claytonia lanceolata | Pursh | Montiaceae | 8 |
| Claytonia megarhiza | (A.Gray) Parry ex S.Watson | Montiaceae | 8 |
| Claytonia perfoliata | Donn ex Willd. | Montiaceae | 8 |
| Claytonia rubra | (Howell) Tidestr. | Montiaceae | 8 |
| Clematis columbiana | (Nutt.) Torr. & A.Gray | Ranunculaceae | 8 |
| Clematis hirsutissima | Pursh | Ranunculaceae | 8 |
| Clematis ligusticifolia | Nutt. | Ranunculaceae | 8 |
| Clematis occidentalis | (Hornem.) DC. | Ranunculaceae | 8 |
| Cleome dodecandra | L. | Cleomaceae | 8 |
| Cleomella lutea | (Hook.) Roalson & J.C.Hall | Cleomaceae | 8 |
| Cleomella multicaulis | (DC.) J.C.Hall & Roalson | Cleomaceae | 8 |
| Cleomella serrulata | (Pursh) Roalson & J.C.Hall | Cleomaceae | 8 |
| Collinsia parviflora | Douglas ex Lindl. | Plantaginaceae | 8 |
| Collomia debilis | Greene | Polemoniaceae | 8 |
| Collomia grandiflora | Douglas ex Lindl. | Polemoniaceae | 8 |
| Collomia linearis | Nutt. | Polemoniaceae | 8 |
| Comandra umbellata | (L.) Nutt. | Santalaceae | 8 |
| Comarum palustre | L. | Rosaceae | 8 |
| Comastoma tenellum | (Rottb.) Toyok. | Gentianaceae | 8 |
| Commelina erecta | L. | Commelinaceae | 8 |
| Conioselinum scopulorum | (A.Gray) J.M.Coult. & Rose | Apiaceae | 8 |
| Corallorhiza maculata | Raf. | Orchidaceae | 8 |
| Corallorhiza mertensiana | Bong. | Orchidaceae | 8 |
| Corallorhiza striata | Lindl. | Orchidaceae | 8 |
| Corallorhiza trifida | Châtel. | Orchidaceae | 8 |
| Corallorhiza wisteriana | Conrad | Orchidaceae | 8 |
| Cordylanthus ramosus | Nutt. ex Benth. | Orobanchaceae | 8 |
| Coreopsis tinctoria | Nutt. | Asteraceae | 8 |
| Corispermum villosum | Rydb. | Chenopodiaceae | 8 |
| Cornus canadensis | L. | Cornaceae | 8 |
| Cornus sericea | L. | Cornaceae | 8 |
| Corydalis aurea | Willd. | Papaveraceae | 8 |
| Corylus cornuta | Marshall | Betulaceae | 8 |
| Crataegus chrysocarpa | Ashe | Rosaceae | 8 |
| Crataegus erythropoda | Ashe | Rosaceae | 8 |
| Crataegus macracantha | (Lindl.) Lodd. ex Loudon | Rosaceae | 8 |
| Crataegus rivularis | Nutt. | Rosaceae | 8 |
| Crepis acuminata | Nutt. | Asteraceae | 8 |
| Crepis atribarba | A.Heller | Asteraceae | 8 |
| Crepis intermedia | A.Gray | Asteraceae | 8 |
| Crepis occidentalis | Nutt. | Asteraceae | 8 |
| Crocanthemum bicknellii | (Fernald) Janch. | Cistaceae | 8 |
| Croton texensis | (Klotzsch) Müll.Arg. | Euphorbiaceae | 8 |
| Crucihimalaya virgata | (Nutt.) D.A.German & A.L.Ebel | Brassicaceae | 8 |
| Cryptantha ambigua | (A.Gray) Greene | Boraginaceae | 8 |
| Cryptantha fendleri | (A.Gray) Greene | Boraginaceae | 8 |
| Cryptantha gracilis | Osterh. | Boraginaceae | 8 |
| Cryptantha minima | Rydb. | Boraginaceae | 8 |
| Cryptantha scoparia | A.Nelson | Boraginaceae | 8 |
| Cryptogramma acrostichoides | R.Br. | Pteridaceae | 8 |
| Cryptogramma stelleri | (S.G.Gmel.) Prantl | Pteridaceae | 8 |
| Cucurbita foetidissima | Kunth | Cucurbitaceae | 8 |
| Cuscuta campestris | Yunck. | Convolvulaceae | 8 |
| Cuscuta gronovii | Willd. | Convolvulaceae | 8 |
| Cuscuta indecora | Choisy | Convolvulaceae | 8 |
| Cymopterus alpinus | A.Gray | Apiaceae | 8 |
| Cymopterus glomeratus | (Nutt.) DC. | Apiaceae | 8 |
| Cymopterus hendersonii | (J.M.Coult. & Rose) Cronquist | Apiaceae | 8 |
| Cymopterus lemmonii | (J.M.Coult. & Rose) Dorn | Apiaceae | 8 |
| Cymopterus longipes | S.Watson | Apiaceae | 8 |
| Cymopterus nivalis | S.Watson | Apiaceae | 8 |
| Cymopterus sessiliflorus | (W.L.Theob. & C.C.Tseng) R.L.Hartm. | Apiaceae | 8 |
| Cymopterus terebinthinus | (Hook.) Torr. & A.Gray | Apiaceae | 8 |
| Cymopterus williamsii | R.L.Hartm. & Constance | Apiaceae | 8 |
| Cyperus acuminatus | Torr. & Hook. | Cyperaceae | 8 |
| Cyperus fendlerianus | Boeckeler | Cyperaceae | 8 |
| Cyperus odoratus | L. | Cyperaceae | 8 |
| Cyperus schweinitzii | Torr. | Cyperaceae | 8 |
| Cyperus squarrosus | L. | Cyperaceae | 8 |
| Cypripedium fasciculatum | Kellogg | Orchidaceae | 8 |
| Cypripedium montanum | Douglas ex Lindl. | Orchidaceae | 8 |
| Cyrtorhyncha ranunculina | Nutt. | Ranunculaceae | 8 |
| Cystopteris fragilis | (L.) Bernh. | Cystopteridaceae | 8 |
| Dactylorhiza viridis | (L.) R.M.Bateman, Pridgeon & M.W.Chase | Orchidaceae | 8 |
| Dalea candida | Willd. | Fabaceae | 8 |
| Dalea cylindriceps | Barneby | Fabaceae | 8 |
| Dalea enneandra | Nutt. | Fabaceae | 8 |
| Dalea purpurea | Vent. | Fabaceae | 8 |
| Danthonia californica | Bol. | Poaceae | 8 |
| Danthonia intermedia | Vasey | Poaceae | 8 |
| Danthonia spicata | (L.) Roem. & Schult. | Poaceae | 8 |
| Danthonia unispicata | (Thurb.) Munro ex Macoun | Poaceae | 8 |
| Dasiphora fruticosa | (L.) Rydb. | Rosaceae | 8 |
| Delphinium barbeyi | (Huth) Huth | Ranunculaceae | 8 |
| Delphinium bicolor | Nutt. | Ranunculaceae | 8 |
| Delphinium geyeri | Greene | Ranunculaceae | 8 |
| Delphinium glaucum | S.Watson | Ranunculaceae | 8 |
| Delphinium nuttallianum | Pritz. | Ranunculaceae | 8 |
| Delphinium occidentale | S.Watson ex J.M.Coult. | Ranunculaceae | 8 |
| Dendrolycopodium dendroideum | (Michx.) A.Haines | Lycopodiaceae | 8 |
| Deschampsia danthonioides | (Trin.) Benth. | Poaceae | 8 |
| Deschampsia elongata | (Hook.) Munro | Poaceae | 8 |
| Descurainia californica | (A.Gray) O.E.Schulz | Brassicaceae | 8 |
| Descurainia incana | (Bernh. ex Fisch. & C.A.Mey.) Dorn | Brassicaceae | 8 |
| Descurainia incisa | (Engelm.) Britton | Brassicaceae | 8 |
| Descurainia longepedicellata | (E.Fourn.) O.E.Schulz | Brassicaceae | 8 |
| Descurainia pinnata | (Walter) Britton | Brassicaceae | 8 |
| Diaperia prolifera | (Nutt. ex DC.) Nutt. | Asteraceae | 8 |
| Dicentra uniflora | Kellogg | Papaveraceae | 8 |
| Dichanthelium depauperatum | (Muhl.) Gould | Poaceae | 8 |
| Dichanthelium lanuginosum | (Elliott) Gould | Poaceae | 8 |
| Dichanthelium linearifolium | (Scribn.) Gould | Poaceae | 8 |
| Dieteria bigelovii | (A.Gray) D.R.Morgan & R.L.Hartm. | Asteraceae | 8 |
| Dieteria canescens | (Pursh) Nutt. | Asteraceae | 8 |
| Diphasiastrum complanatum | (L.) Holub | Lycopodiaceae | 8 |
| Diplachne fusca | (L.) P.Beauv. | Poaceae | 8 |
| Diplacus nanus | (Hook. & Arn.) G.L.Nesom | Phrymaceae | 8 |
| Distichlis spicata | (L.) Greene | Poaceae | 8 |
| Draba albertina | Greene | Brassicaceae | 8 |
| Draba aurea | Vahl ex Hornem. | Brassicaceae | 8 |
| Draba cana | Rydb. | Brassicaceae | 8 |
| Draba crassa | Rydb. | Brassicaceae | 8 |
| Draba densifolia | Nutt. | Brassicaceae | 8 |
| Draba lonchocarpa | Rydb. | Brassicaceae | 8 |
| Draba nemorosa | L. | Brassicaceae | 8 |
| Draba novolympica | Payson & H.St.John | Brassicaceae | 8 |
| Draba oligosperma | Hook. | Brassicaceae | 8 |
| Draba praealta | Greene | Brassicaceae | 8 |
| Dracocephalum parviflorum | Nutt. | Lamiaceae | 8 |
| Drosera anglica | Huds. | Droseraceae | 8 |
| Dryas hookeriana | Juz. | Rosaceae | 8 |
| Drymocallis arguta | (Pursh) Rydb. | Rosaceae | 8 |
| Drymocallis convallaria | (Rydb.) Rydb. | Rosaceae | 8 |
| Drymocallis fissa | (Nutt.) Rydb. | Rosaceae | 8 |
| Dryopteris expansa | (C.Presl) Fraser-Jenk. & Jermy | Dryopteridaceae | 8 |
| Dryopteris filix-mas | (L.) Schott | Dryopteridaceae | 8 |
| Dulichium arundinaceum | (L.) Britton | Cyperaceae | 8 |
| Dyssodia papposa | (Vent.) Hitchc. | Asteraceae | 8 |
| Echinacea angustifolia | DC. | Asteraceae | 8 |
| Echinochloa muricata | (P.Beauv.) Fernald | Poaceae | 8 |
| Echinocystis lobata | (Michx.) Torr. & A.Gray | Cucurbitaceae | 8 |
| Elaeagnus commutata | Bernh. ex Rydb. | Elaeagnaceae | 8 |
| Elatine brachysperma | A.Gray | Elatinaceae | 8 |
| Eleocharis acicularis | (L.) Roem. & Schult. | Cyperaceae | 8 |
| Eleocharis elliptica | Kunth | Cyperaceae | 8 |
| Eleocharis erythropoda | Steud. | Cyperaceae | 8 |
| Eleocharis macrostachya | Britton | Cyperaceae | 8 |
| Eleocharis obtusa | (Willd.) Schult. | Cyperaceae | 8 |
| Eleocharis palustris | (L.) Roem. & Schult. | Cyperaceae | 8 |
| Eleocharis quinqueflora | (Hartmann) O.Schwarz | Cyperaceae | 8 |
| Eleocharis rostellata | (Torr.) Torr. | Cyperaceae | 8 |
| Ellisia nyctelea | (L.) L. | Hydrophyllaceae | 8 |
| Elodea canadensis | Michx. | Hydrocharitaceae | 8 |
| Elodea nuttallii | (Planch.) H.St.John | Hydrocharitaceae | 8 |
| Elymus albicans | (Scribn. & J.G.Sm.) Á.Löve | Poaceae | 8 |
| Elymus canadensis | L. | Poaceae | 8 |
| Elymus curvatus | Piper | Poaceae | 8 |
| Elymus elymoides | (Raf.) Swezey | Poaceae | 8 |
| Elymus glaucus | Buckley | Poaceae | 8 |
| Elymus lanceolatus | (Scribn. & J.G.Sm.) Gould | Poaceae | 8 |
| Elymus longifolius | (J.G.Sm.) Gould | Poaceae | 8 |
| Elymus multisetus | (J.G.Sm.) Burtt Davy | Poaceae | 8 |
| Elymus scribneri | (Vasey) M.E.Jones | Poaceae | 8 |
| Elymus smithii | (Rydb.) Gould | Poaceae | 8 |
| Elymus villosus | Muhl. ex Willd. | Poaceae | 8 |
| Elymus violaceus | (Hornem.) J.Feilberg | Poaceae | 8 |
| Elymus virginicus | L. | Poaceae | 8 |
| Ephedra viridis | Coville | Ephedraceae | 8 |
| Epilobium anagallidifolium | Lam. | Onagraceae | 8 |
| Epilobium angustifolium | L. | Onagraceae | 8 |
| Epilobium brachycarpum | C.Presl | Onagraceae | 8 |
| Epilobium canum | (Greene) P.H.Raven | Onagraceae | 8 |
| Epilobium ciliatum | Raf. | Onagraceae | 8 |
| Epilobium clavatum | Trel. | Onagraceae | 8 |
| Epilobium hornemannii | Rchb. | Onagraceae | 8 |
| Epilobium lactiflorum | Hausskn. | Onagraceae | 8 |
| Epilobium latifolium | L. | Onagraceae | 8 |
| Epilobium leptophyllum | Raf. | Onagraceae | 8 |
| Epilobium palustre | L. | Onagraceae | 8 |
| Epipactis gigantea | Douglas | Orchidaceae | 8 |
| Equisetum arvense | L. | Equisetaceae | 8 |
| Equisetum fluviatile | L. | Equisetaceae | 8 |
| Equisetum hyemale | L. | Equisetaceae | 8 |
| Equisetum laevigatum | A.Braun | Equisetaceae | 8 |
| Equisetum scirpoides | Michx. | Equisetaceae | 8 |
| Equisetum sylvaticum | L. | Equisetaceae | 8 |
| Equisetum variegatum | Schleich. ex F.Weber & D.Mohr | Equisetaceae | 8 |
| Eragrostis hypnoides | (Lam.) Britton, Sterns & Poggenb. | Poaceae | 8 |
| Eragrostis pectinacea | (Michx.) Nees | Poaceae | 8 |
| Eragrostis spectabilis | (Pursh) Steud. | Poaceae | 8 |
| Eragrostis trichodes | (Nutt.) Alph.Wood | Poaceae | 8 |
| Eremogone congesta | (Nutt.) Ikonn. | Caryophyllaceae | 8 |
| Eremogone eastwoodiae | (Rydb.) Ikonn. | Caryophyllaceae | 8 |
| Eremogone fendleri | (A.Gray) Ikonn. | Caryophyllaceae | 8 |
| Eriastrum wilcoxii | (A.Nelson) H.Mason | Polemoniaceae | 8 |
| Ericameria nauseosa | (Pursh) G.L.Nesom & G.I.Baird | Asteraceae | 8 |
| Ericameria parryi | (A.Gray) G.L.Nesom & G.I.Baird | Asteraceae | 8 |
| Ericameria suffruticosa | (Nutt.) G.L.Nesom | Asteraceae | 8 |
| Erigeron acris | L. | Asteraceae | 8 |
| Erigeron annuus | (L.) Desf. | Asteraceae | 8 |
| Erigeron bellidiastrum | Nutt. | Asteraceae | 8 |
| Erigeron caespitosus | Nutt. | Asteraceae | 8 |
| Erigeron canadensis | L. | Asteraceae | 8 |
| Erigeron compositus | Pursh | Asteraceae | 8 |
| Erigeron concinnus | Torr. & A.Gray | Asteraceae | 8 |
| Erigeron divergens | Torr. & A.Gray | Asteraceae | 8 |
| Erigeron eatonii | A.Gray | Asteraceae | 8 |
| Erigeron elatior | Greene | Asteraceae | 8 |
| Erigeron engelmannii | A.Nelson | Asteraceae | 8 |
| Erigeron flagellaris | A.Gray | Asteraceae | 8 |
| Erigeron formosissimus | Greene | Asteraceae | 8 |
| Erigeron glabellus | Nutt. | Asteraceae | 8 |
| Erigeron glacialis | (Nutt.) A.Nelson | Asteraceae | 8 |
| Erigeron humilis | Graham | Asteraceae | 8 |
| Erigeron lanatus | Hook. | Asteraceae | 8 |
| Erigeron linearis | (Hook.) Piper | Asteraceae | 8 |
| Erigeron lonchophyllus | Hook. | Asteraceae | 8 |
| Erigeron nivalis | Nutt. | Asteraceae | 8 |
| Erigeron ochroleucus | Nutt. | Asteraceae | 8 |
| Erigeron philadelphicus | L. | Asteraceae | 8 |
| Erigeron pinnatisectus | (A.Gray) A.Nelson | Asteraceae | 8 |
| Erigeron pumilus | Nutt. | Asteraceae | 8 |
| Erigeron speciosus | (Lindl.) DC. | Asteraceae | 8 |
| Erigeron strigosus | Muhl. ex Willd. | Asteraceae | 8 |
| Erigeron tener | A.Gray | Asteraceae | 8 |
| Erigeron ursinus | D.C.Eaton | Asteraceae | 8 |
| Erigeron vetensis | Rydb. | Asteraceae | 8 |
| Eriocoma hymenoides | (Roem. & Schult.) Rydb. | Poaceae | 8 |
| Eriocoma nelsonii | (Scribn.) Romasch. | Poaceae | 8 |
| Eriocoma occidentalis | (Thurb. ex S.Watson) Romasch. | Poaceae | 8 |
| Eriocoma pinetorum | (M.E.Jones) Romasch. | Poaceae | 8 |
| Eriocoma richardsonii | (Link) Romasch. | Poaceae | 8 |
| Eriocoma thurberiana | (Piper) Romasch. | Poaceae | 8 |
| Eriogonum alatum | Torr. | Polygonaceae | 8 |
| Eriogonum annuum | Nutt. | Polygonaceae | 8 |
| Eriogonum arcuatum | Greene | Polygonaceae | 8 |
| Eriogonum brevicaule | Nutt. | Polygonaceae | 8 |
| Eriogonum caespitosum | Nutt. | Polygonaceae | 8 |
| Eriogonum cernuum | Nutt. | Polygonaceae | 8 |
| Eriogonum corymbosum | Benth. | Polygonaceae | 8 |
| Eriogonum effusum | Nutt. | Polygonaceae | 8 |
| Eriogonum flavum | Nutt. | Polygonaceae | 8 |
| Eriogonum heracleoides | Nutt. | Polygonaceae | 8 |
| Eriogonum hookeri | S.Watson | Polygonaceae | 8 |
| Eriogonum ovalifolium | Nutt. | Polygonaceae | 8 |
| Eriogonum pauciflorum | Pursh | Polygonaceae | 8 |
| Eriogonum umbellatum | Torr. | Polygonaceae | 8 |
| Eriophorum angustifolium | Honck. | Cyperaceae | 8 |
| Eriophorum chamissonis | C.A.Mey. | Cyperaceae | 8 |
| Eriophorum gracile | Roth | Cyperaceae | 8 |
| Eriophorum scheuchzeri | Hoppe | Cyperaceae | 8 |
| Eriophorum viridicarinatum | (Engelm.) Fernald | Cyperaceae | 8 |
| Eriophyllum lanatum | (Pursh) J.Forbes | Asteraceae | 8 |
| Erocallis triphylla | (S.Watson) Rydb. | Montiaceae | 8 |
| Erysimum asperum | (Nutt.) DC. | Brassicaceae | 8 |
| Erythranthe arvensis | (Greene) G.L.Nesom | Phrymaceae | 8 |
| Erythranthe breweri | (Greene) G.L.Nesom & N.S.Fraga | Phrymaceae | 8 |
| Erythranthe floribunda | (Lindl.) G.L.Nesom | Phrymaceae | 8 |
| Erythranthe geyeri | (Torr.) G.L.Nesom | Phrymaceae | 8 |
| Erythranthe guttata | (DC.) G.L.Nesom | Phrymaceae | 8 |
| Erythranthe lewisii | (Pursh) G.L.Nesom & N.S.Fraga | Phrymaceae | 8 |
| Erythranthe minor | (A.Nelson) G.L.Nesom | Phrymaceae | 8 |
| Erythranthe moschata | (Douglas ex Lindl.) G.L.Nesom | Phrymaceae | 8 |
| Erythranthe rubella | (A.Gray) N.S.Fraga | Phrymaceae | 8 |
| Erythranthe suksdorfii | (A.Gray) N.S.Fraga | Phrymaceae | 8 |
| Erythranthe thermalis | (A.Nelson) G.L.Nesom | Phrymaceae | 8 |
| Erythranthe tilingii | (Regel) G.L.Nesom | Phrymaceae | 8 |
| Erythronium grandiflorum | Pursh | Liliaceae | 8 |
| Euphorbia brachycera | Engelm. | Euphorbiaceae | 8 |
| Euphorbia exstipulata | Engelm. | Euphorbiaceae | 8 |
| Euphorbia fendleri | Torr. & A.Gray | Euphorbiaceae | 8 |
| Euphorbia geyeri | Engelm. | Euphorbiaceae | 8 |
| Euphorbia glyptosperma | Engelm. | Euphorbiaceae | 8 |
| Euphorbia hexagona | Nutt. ex Spreng. | Euphorbiaceae | 8 |
| Euphorbia maculata | L. | Euphorbiaceae | 8 |
| Euphorbia marginata | Pursh | Euphorbiaceae | 8 |
| Euphorbia missurica | Raf. | Euphorbiaceae | 8 |
| Euphorbia serpens | Kunth | Euphorbiaceae | 8 |
| Euphorbia serpillifolia | Pers. | Euphorbiaceae | 8 |
| Euphorbia spathulata | Lam. | Euphorbiaceae | 8 |
| Euphorbia stictospora | Engelm. | Euphorbiaceae | 8 |
| Euploca convolvulacea | Nutt. | Heliotropiaceae | 8 |
| Eurybia conspicua | (Lindl.) G.L.Nesom | Asteraceae | 8 |
| Eurybia integrifolia | (Nutt.) G.L.Nesom | Asteraceae | 8 |
| Eustoma russellianum | (Hook.) G.Don | Gentianaceae | 8 |
| Euthamia graminifolia | (L.) Nutt. | Asteraceae | 8 |
| Euthamia gymnospermoides | Greene | Asteraceae | 8 |
| Euthamia occidentalis | Nutt. | Asteraceae | 8 |
| Eutrochium maculatum | (L.) E.E.Lamont | Asteraceae | 8 |
| Evolvulus nuttallianus | Schult. | Convolvulaceae | 8 |
| Fallopia scandens | (L.) Holub | Polygonaceae | 8 |
| Festuca brachyphylla | Schult. & Schult.f. | Poaceae | 8 |
| Festuca idahoensis | Elmer | Poaceae | 8 |
| Festuca kingii | (S.Watson) Cassidy | Poaceae | 8 |
| Festuca occidentalis | Hook. | Poaceae | 8 |
| Festuca octoflora | Walter | Poaceae | 8 |
| Festuca rubra | L. | Poaceae | 8 |
| Floerkea proserpinacoides | Willd. | Limnanthaceae | 8 |
| Fragaria vesca | L. | Rosaceae | 8 |
| Fragaria virginiana | Mill. | Rosaceae | 8 |
| Frasera speciosa | Douglas ex Griseb. | Gentianaceae | 8 |
| Fraxinus anomala | Torr. ex S.Watson | Oleaceae | 8 |
| Fraxinus pennsylvanica | Marshall | Oleaceae | 8 |
| Fritillaria atropurpurea | Nutt. | Liliaceae | 8 |
| Fritillaria pudica | (Pursh) Spreng. | Liliaceae | 8 |
| Froelichia gracilis | (Hook.) Moq. | Amaranthaceae | 8 |
| Gagea serotina | (L.) Ker Gawl. | Liliaceae | 8 |
| Gaillardia aristata | Pursh | Asteraceae | 8 |
| Galearis rotundifolia | (Banks ex Pursh) R.M.Bateman | Orchidaceae | 8 |
| Galium trifidum | L. | Rubiaceae | 8 |
| Galium triflorum | Michx. | Rubiaceae | 8 |
| Gaultheria humifusa | (Graham) Rydb. | Ericaceae | 8 |
| Gayophytum ramosissimum | Torr. & A.Gray | Onagraceae | 8 |
| Gentiana affinis | Griseb. | Gentianaceae | 8 |
| Gentiana algida | Pall. | Gentianaceae | 8 |
| Gentiana calycosa | Griseb. | Gentianaceae | 8 |
| Gentiana parryi | Engelm. | Gentianaceae | 8 |
| Gentiana prostrata | Haenke | Gentianaceae | 8 |
| Gentianella propinqua | (Richardson) J.M.Gillett | Gentianaceae | 8 |
| Gentianopsis barbellata | (Engelm.) Iltis | Gentianaceae | 8 |
| Gentianopsis thermalis | (Kuntze) Iltis | Gentianaceae | 8 |
| Geranium bicknellii | Britton | Geraniaceae | 8 |
| Geranium caespitosum | E.James | Geraniaceae | 8 |
| Geranium carolinianum | L. | Geraniaceae | 8 |
| Geranium richardsonii | Fisch. & Trautv. | Geraniaceae | 8 |
| Geranium viscosissimum | Fisch. & C.A.Mey. | Geraniaceae | 8 |
| Geum aleppicum | Jacq. | Rosaceae | 8 |
| Geum canadense | Jacq. | Rosaceae | 8 |
| Geum macrophyllum | Willd. | Rosaceae | 8 |
| Geum rivale | L. | Rosaceae | 8 |
| Geum rossii | (R.Br.) Ser. | Rosaceae | 8 |
| Geum triflorum | Pursh | Rosaceae | 8 |
| Gilia ophthalmoides | Brand | Polemoniaceae | 8 |
| Gleditsia triacanthos | L. | Fabaceae | 8 |
| Glossopetalon spinescens | A.Gray | Crossosomataceae | 8 |
| Glyceria borealis | (Nash) Batch. | Poaceae | 8 |
| Glyceria elata | (Nash) M.E.Jones | Poaceae | 8 |
| Glyceria grandis | S.Watson | Poaceae | 8 |
| Glyceria striata | (Lam.) Hitchc. | Poaceae | 8 |
| Glycyrrhiza lepidota | Pursh | Fabaceae | 8 |
| Gnaphalium palustre | Nutt. | Asteraceae | 8 |
| Gnaphalium uliginosum | L. | Asteraceae | 8 |
| Goodyera oblongifolia | Raf. | Orchidaceae | 8 |
| Graphephorum canescens | (Buckley) Röser & Tkach | Poaceae | 8 |
| Graphephorum wolfii | (Vasey) Coult. | Poaceae | 8 |
| Gratiola neglecta | Torr. | Plantaginaceae | 8 |
| Grayia spinosa | (Hook.) Moq. | Chenopodiaceae | 8 |
| Grindelia hirsutula | Hook. & Arn. | Asteraceae | 8 |
| Grindelia squarrosa | (Pursh) Dunal | Asteraceae | 8 |
| Grindelia subalpina | Greene | Asteraceae | 8 |
| Gutierrezia sarothrae | (Pursh) Britton & Rusby | Asteraceae | 8 |
| Gymnocarpium disjunctum | (Rupr.) Ching | Cystopteridaceae | 8 |
| Gymnocarpium dryopteris | (L.) Newman | Cystopteridaceae | 8 |
| Gymnosteris parvula | A.Heller | Polemoniaceae | 8 |
| Hackelia deflexa | (Wahlenb.) Opiz | Boraginaceae | 8 |
| Hackelia floribunda | (Lehm.) I.M.Johnst. | Boraginaceae | 8 |
| Hackelia micrantha | (Eastw.) J.L.Gentry | Boraginaceae | 8 |
| Hackelia patens | I.M.Johnst. | Boraginaceae | 8 |
| Halenia deflexa | (Sm.) Griseb. | Gentianaceae | 8 |
| Halerpestes cymbalaria | Greene | Ranunculaceae | 8 |
| Harbouria trachypleura | J.M.Coult. & Rose | Apiaceae | 8 |
| Hedeoma drummondii | Benth. | Lamiaceae | 8 |
| Hedysarum alpinum | L. | Fabaceae | 8 |
| Hedysarum boreale | Nutt. | Fabaceae | 8 |
| Hedysarum occidentale | Greene | Fabaceae | 8 |
| Hedysarum sulphurescens | Rydb. | Fabaceae | 8 |
| Helenium autumnale | L. | Asteraceae | 8 |
| Helianthella quinquenervis | (Hook.) A.Gray | Asteraceae | 8 |
| Helianthella uniflora | Torr. & A.Gray | Asteraceae | 8 |
| Helianthus maximiliani | Schrad. | Asteraceae | 8 |
| Helianthus nuttallii | Torr. & A.Gray | Asteraceae | 8 |
| Helianthus pauciflorus | Nutt. | Asteraceae | 8 |
| Helianthus petiolaris | Nutt. | Asteraceae | 8 |
| Helianthus pumilus | Nutt. | Asteraceae | 8 |
| Helianthus tuberosus | L. | Asteraceae | 8 |
| Helictochloa hookeri | (Scribn.) Romero Zarco | Poaceae | 8 |
| Heliomeris multiflora | Nutt. | Asteraceae | 8 |
| Heliotropium curassavicum | L. | Heliotropiaceae | 8 |
| Heracleum maximum | W.Bartram | Apiaceae | 8 |
| Herrickia glauca | (Nutt.) Brouillet | Asteraceae | 8 |
| Hesperochiron nanus | (Lindl.) Greene | Hydrophyllaceae | 8 |
| Hesperochiron pumilus | (Griseb.) Porter | Hydrophyllaceae | 8 |
| Hesperostipa comata | (Trin. & Rupr.) Barkworth | Poaceae | 8 |
| Hesperostipa curtiseta | (Hitchc.) Barkworth | Poaceae | 8 |
| Hesperostipa neomexicana | (Thurb.) Barkworth | Poaceae | 8 |
| Hesperostipa spartea | (Trin.) Barkworth | Poaceae | 8 |
| Heterocodon rariflorus | Nutt. | Campanulaceae | 8 |
| Heterotheca pumila | (Greene) Semple | Asteraceae | 8 |
| Heuchera bracteata | (Torr.) Ser. | Saxifragaceae | 8 |
| Heuchera cylindrica | Douglas | Saxifragaceae | 8 |
| Heuchera parvifolia | Nutt. ex Torr. & A.Gray | Saxifragaceae | 8 |
| Heuchera richardsonii | R.Br. | Saxifragaceae | 8 |
| Hieracium albiflorum | Hook. | Asteraceae | 8 |
| Hieracium fendleri | Sch.Bip. | Asteraceae | 8 |
| Hieracium scouleri | Hook. | Asteraceae | 8 |
| Hieracium triste | Willd. ex Spreng. | Asteraceae | 8 |
| Hieracium umbellatum | L. | Asteraceae | 8 |
| Hilaria jamesii | (Torr.) Benth. | Poaceae | 8 |
| Hippuris vulgaris | L. | Plantaginaceae | 8 |
| Holodiscus discolor | (Pursh) Maxim. | Rosaceae | 8 |
| Hordeum brachyantherum | Nevski | Poaceae | 8 |
| Hordeum jubatum | L. | Poaceae | 8 |
| Hulsea algida | A.Gray | Asteraceae | 8 |
| Humulus neomexicanus | (A.Nelson & Cockerell) Rydb. | Cannabaceae | 8 |
| Hydrophyllum capitatum | Douglas ex Benth. | Hydrophyllaceae | 8 |
| Hydrophyllum fendleri | (A.Gray) A.Heller | Hydrophyllaceae | 8 |
| Hymenopappus filifolius | Hook. | Asteraceae | 8 |
| Hymenopappus tenuifolius | Pursh | Asteraceae | 8 |
| Hymenothrix dissecta | (A.Gray) B.G.Baldwin | Asteraceae | 8 |
| Hymenoxys grandiflora | (Torr. & A.Gray) K.F.Parker | Asteraceae | 8 |
| Hymenoxys hoopesii | (A.Gray) Bierner | Asteraceae | 8 |
| Hymenoxys richardsonii | Cockerell | Asteraceae | 8 |
| Hypericum scouleri | Hook. | Hypericaceae | 8 |
| Hypopitys monotropa | Crantz | Ericaceae | 8 |
| Iliamna rivularis | (Douglas) Greene | Malvaceae | 8 |
| Ionactis alpina | (Nutt.) Greene | Asteraceae | 8 |
| Ipomoea leptophylla | Torr. | Convolvulaceae | 8 |
| Ipomopsis aggregata | (Pursh) V.E.Grant | Polemoniaceae | 8 |
| Ipomopsis congesta | (Hook.) V.E.Grant | Polemoniaceae | 8 |
| Ipomopsis longiflora | (Torr.) V.E.Grant | Polemoniaceae | 8 |
| Ipomopsis polycladon | (Torr.) V.E.Grant | Polemoniaceae | 8 |
| Ipomopsis pumila | (Nutt.) V.E.Grant | Polemoniaceae | 8 |
| Ipomopsis spicata | (Nutt.) V.E.Grant | Polemoniaceae | 8 |
| Ipomopsis tenuituba | (Rydb.) V.E.Grant | Polemoniaceae | 8 |
| Iris missouriensis | Nutt. | Iridaceae | 8 |
| Isoetes bolanderi | Engelm. | Isoetaceae | 8 |
| Isoetes echinospora | Durieu | Isoetaceae | 8 |
| Iva axillaris | Pursh | Asteraceae | 8 |
| Jamesia americana | Torr. & A.Gray | Hydrangeaceae | 8 |
| Juncus balticus | Willd. | Juncaceae | 8 |
| Juncus bufonius | L. | Juncaceae | 8 |
| Juncus castaneus | Sm. | Juncaceae | 8 |
| Juncus drummondii | E.Mey. | Juncaceae | 8 |
| Juncus dudleyi | Wiegand | Juncaceae | 8 |
| Juncus ensifolius | Wikstr. | Juncaceae | 8 |
| Juncus interior | Wiegand | Juncaceae | 8 |
| Juncus mertensianus | Bong. | Juncaceae | 8 |
| Juncus nodosus | L. | Juncaceae | 8 |
| Juncus parryi | Engelm. | Juncaceae | 8 |
| Juncus tenuis | Willd. | Juncaceae | 8 |
| Juncus torreyi | Coville | Juncaceae | 8 |
| Juncus tweedyi | Rydb. | Juncaceae | 8 |
| Juniperus communis | L. | Cupressaceae | 8 |
| Juniperus horizontalis | Moench | Cupressaceae | 8 |
| Juniperus osteosperma | (Torr.) Little | Cupressaceae | 8 |
| Juniperus scopulorum | Sarg. | Cupressaceae | 8 |
| Kalmia microphylla | (Hook.) A.Heller | Ericaceae | 8 |
| Kalmia procumbens | (L.) Gift, Kron & P.F.Stevens ex Galasso, Banfi & F.Conti | Ericaceae | 8 |
| Kelloggia galioides | Torr. | Rubiaceae | 8 |
| Kelseya uniflora | Rydb. | Rosaceae | 8 |
| Kirkpatrickia breweri | (D.C.Eaton) Li Bing Zhang, X.M.Zhou & Jing Zhao | Pteridaceae | 8 |
| Koeleria macrantha | (Ledeb.) Schult. | Poaceae | 8 |
| Koeleria spicata | (L.) Barberá, Quintanar, Soreng & P.M.Peterson | Poaceae | 8 |
| Krascheninnikovia ceratoides | (L.) Gueldenst. | Chenopodiaceae | 8 |
| Lactuca biennis | (Moench) Fernald | Asteraceae | 8 |
| Lactuca canadensis | L. | Asteraceae | 8 |
| Lactuca ludoviciana | (Nutt.) Riddell | Asteraceae | 8 |
| Lactuca oblongifolia | Nutt. | Asteraceae | 8 |
| Ladeania lanceolata | (Pursh) Reveal & A.N.Egan | Fabaceae | 8 |
| Lappula occidentalis | (S.Watson) Greene | Boraginaceae | 8 |
| Lathyrus decaphyllus | Pursh | Fabaceae | 8 |
| Lathyrus eucosmus | Butters & H.St.John | Fabaceae | 8 |
| Lathyrus lanszwertii | Kellogg | Fabaceae | 8 |
| Lathyrus ochroleucus | Hook. | Fabaceae | 8 |
| Lechea intermedia | Legg. ex Britton | Cistaceae | 8 |
| Leersia oryzoides | (L.) Sw. | Poaceae | 8 |
| Leersia virginica | Willd. | Poaceae | 8 |
| Lemna gibba | L. | Araceae | 8 |
| Lemna minor | L. | Araceae | 8 |
| Lemna trisulca | L. | Araceae | 8 |
| Lemna turionifera | Landolt | Araceae | 8 |
| Lepidium alyssoides | A.Gray | Brassicaceae | 8 |
| Lepidium densiflorum | Schrad. | Brassicaceae | 8 |
| Lepidium montanum | Nutt. | Brassicaceae | 8 |
| Lepidium virginicum | L. | Brassicaceae | 8 |
| Leptosiphon nuttallii | (A.Gray) J.M.Porter & L.A.Johnson | Polemoniaceae | 8 |
| Leptosiphon septentrionalis | (H.Mason) J.M.Porter & L.A.Johnson | Polemoniaceae | 8 |
| Leucocrinum montanum | Nutt. ex A.Gray | Asparagaceae | 8 |
| Lewisia pygmaea | (A.Gray) B.L.Rob. | Montiaceae | 8 |
| Lewisia rediviva | Pursh | Montiaceae | 8 |
| Leymus cinereus | (Scribn. & Merr.) Á.Löve | Poaceae | 8 |
| Leymus innovatus | (Beal) Pilg. | Poaceae | 8 |
| Leymus triticoides | (Buckley) Pilg. | Poaceae | 8 |
| Liatris ligulistylis | (A.Nelson) K.Schum. | Asteraceae | 8 |
| Liatris punctata | Hook. | Asteraceae | 8 |
| Ligusticum porteri | J.M.Coult. & Rose | Apiaceae | 8 |
| Lilium philadelphicum | L. | Liliaceae | 8 |
| Limosella aquatica | L. | Plantaginaceae | 8 |
| Linanthus caespitosus | (Nutt.) J.M.Porter & L.A.Johnson | Polemoniaceae | 8 |
| Linanthus pungens | (Torr.) J.M.Porter & L.A.Johnson | Polemoniaceae | 8 |
| Linanthus watsonii | (A.Gray) Wherry | Polemoniaceae | 8 |
| Linnaea borealis | L. | Caprifoliaceae | 8 |
| Linum australe | A.Heller | Linaceae | 8 |
| Linum compactum | A.Nelson | Linaceae | 8 |
| Linum kingii | S.Watson | Linaceae | 8 |
| Linum lewisii | Pursh | Linaceae | 8 |
| Linum puberulum | (Engelm.) A.Heller | Linaceae | 8 |
| Linum rigidum | Pursh | Linaceae | 8 |
| Lithophragma glabrum | Nutt. | Saxifragaceae | 8 |
| Lithophragma parviflorum | (Hook.) Nutt. | Saxifragaceae | 8 |
| Lithophragma tenellum | Nutt. | Saxifragaceae | 8 |
| Lithospermum incisum | Lehm. | Boraginaceae | 8 |
| Lithospermum multiflorum | Torr. ex A.Gray | Boraginaceae | 8 |
| Lithospermum occidentale | (Mack.) Weakley, Witsell & D.Estes | Boraginaceae | 8 |
| Lithospermum ruderale | Douglas ex Lehm. | Boraginaceae | 8 |
| Lobelia siphilitica | L. | Campanulaceae | 8 |
| Loeflingia squarrosa | Nutt. | Caryophyllaceae | 8 |
| Lomatium ambiguum | (Nutt.) J.M.Coult. & Rose | Apiaceae | 8 |
| Lomatium cous | (S.Watson) J.M.Coult. & Rose | Apiaceae | 8 |
| Lomatium foeniculaceum | (Nutt.) J.M.Coult. & Rose | Apiaceae | 8 |
| Lomatium grayi | (J.M.Coult. & Rose) J.M.Coult. & Rose | Apiaceae | 8 |
| Lomatium linearifolium | (S.Watson) J.F.Sm. & Mansfield | Apiaceae | 8 |
| Lomatium multifidum | (Nutt.) R.P.McNeill & Darrach | Apiaceae | 8 |
| Lomatium orientale | J.M.Coult. & Rose | Apiaceae | 8 |
| Lomatogonium rotatum | (L.) Fernald | Gentianaceae | 8 |
| Lonicera caerulea | L. | Caprifoliaceae | 8 |
| Lonicera dioica | L. | Caprifoliaceae | 8 |
| Lonicera involucrata | (Richardson) Banks ex Spreng. | Caprifoliaceae | 8 |
| Lonicera utahensis | S.Watson | Caprifoliaceae | 8 |
| Lupinus argenteus | Pursh | Fabaceae | 8 |
| Lupinus brevicaulis | S.Watson | Fabaceae | 8 |
| Lupinus burkei | S.Watson | Fabaceae | 8 |
| Lupinus caudatus | Kellogg | Fabaceae | 8 |
| Lupinus kingii | S.Watson | Fabaceae | 8 |
| Lupinus leucophyllus | Douglas ex Lindl. | Fabaceae | 8 |
| Lupinus prunophilus | M.E.Jones | Fabaceae | 8 |
| Lupinus pusillus | Pursh | Fabaceae | 8 |
| Luzula comosa | E.Mey. | Juncaceae | 8 |
| Luzula parviflora | (Ehrh.) Desv. | Juncaceae | 8 |
| Lycopus americanus | Muhl. ex W.P.C.Barton | Lamiaceae | 8 |
| Lycopus asper | Greene | Lamiaceae | 8 |
| Lycopus uniflorus | Michx. | Lamiaceae | 8 |
| Lygodesmia juncea | (Pursh) Sweet | Asteraceae | 8 |
| Lysimachia ciliata | L. | Primulaceae | 8 |
| Lysimachia maritima | (L.) Galasso, Banfi & Soldano | Primulaceae | 8 |
| Lysimachia minima | (L.) U.Manns & Anderb. | Primulaceae | 8 |
| Lysimachia thyrsiflora | L. | Primulaceae | 8 |
| Lythrum alatum | Pursh | Lythraceae | 8 |
| Machaeranthera tanacetifolia | (Kunth) Nees | Asteraceae | 8 |
| Madia glomerata | Hook. | Asteraceae | 8 |
| Maianthemum canadense | Desf. | Asparagaceae | 8 |
| Maianthemum racemosum | (L.) Link | Asparagaceae | 8 |
| Maianthemum stellatum | (L.) Link | Asparagaceae | 8 |
| Malacothrix sonchoides | (Nutt.) Torr. & A.Gray | Asteraceae | 8 |
| Malacothrix torreyi | A.Gray | Asteraceae | 8 |
| Marsilea vestita | Hook. & Grev. | Marsileaceae | 8 |
| Matricaria discoidea | DC. | Asteraceae | 8 |
| Melica bulbosa | Porter & J.M.Coult. | Poaceae | 8 |
| Melica subulata | (Griseb.) Scribn. | Poaceae | 8 |
| Mentha canadensis | L. | Lamiaceae | 8 |
| Mentzelia albicaulis | (Douglas ex Hook.) Douglas ex Torr. & A.Gray | Loasaceae | 8 |
| Mentzelia decapetala | (Sims) Urb. | Loasaceae | 8 |
| Mentzelia dispersa | S.Watson | Loasaceae | 8 |
| Mentzelia laevicaulis | (Douglas ex Hook.) Torr. & A.Gray | Loasaceae | 8 |
| Mentzelia montana | (Davidson) Davidson | Loasaceae | 8 |
| Mentzelia multiflora | (Nutt.) A.Gray | Loasaceae | 8 |
| Mentzelia nuda | (Pursh) Torr. & A.Gray | Loasaceae | 8 |
| Mentzelia oligosperma | Nutt. ex Sims | Loasaceae | 8 |
| Mentzelia rusbyi | Wooton | Loasaceae | 8 |
| Menyanthes trifoliata | L. | Menyanthaceae | 8 |
| Mertensia arizonica | Greene | Boraginaceae | 8 |
| Mertensia brevistyla | S.Watson | Boraginaceae | 8 |
| Mertensia ciliata | (E.James ex Torr.) G.Don | Boraginaceae | 8 |
| Mertensia lanceolata | (Pursh) DC. | Boraginaceae | 8 |
| Mertensia tweedyi | Rydb. | Boraginaceae | 8 |
| Micranthes ferruginea | (Graham) Brouillet & Gornall | Saxifragaceae | 8 |
| Micranthes nidifica | (Greene) Small | Saxifragaceae | 8 |
| Micranthes occidentalis | (S.Watson) Small | Saxifragaceae | 8 |
| Micranthes odontoloma | A.Heller | Saxifragaceae | 8 |
| Micranthes rhomboidea | Small | Saxifragaceae | 8 |
| Microseris nutans | (Hook.) Sch.Bip. | Asteraceae | 8 |
| Microsteris gracilis | (Hook.) Greene | Polemoniaceae | 8 |
| Mirabilis albida | (Walter) Heimerl | Nyctaginaceae | 8 |
| Mirabilis linearis | (Pursh) Heimerl | Nyctaginaceae | 8 |
| Moehringia lateriflora | (L.) Fenzl | Caryophyllaceae | 8 |
| Mollugo verticillata | L. | Molluginaceae | 8 |
| Monarda fistulosa | L. | Lamiaceae | 8 |
| Moneses uniflora | (L.) A.Gray | Ericaceae | 8 |
| Montia chamissoi | (Ledeb. ex Spreng.) Greene | Montiaceae | 8 |
| Montia fontana | L. | Montiaceae | 8 |
| Montia linearis | (Douglas ex Hook.) Greene | Montiaceae | 8 |
| Muhlenbergia asperifolia | (Nees & Meyen ex Trin.) Parodi | Poaceae | 8 |
| Muhlenbergia cuspidata | (Torr. ex Hook.) Rydb. | Poaceae | 8 |
| Muhlenbergia glomerata | (Willd.) Trin. | Poaceae | 8 |
| Muhlenbergia mexicana | (L.) Trin. | Poaceae | 8 |
| Muhlenbergia minutissima | (Steud.) Swallen | Poaceae | 8 |
| Muhlenbergia montana | (Nutt.) Hitchc. | Poaceae | 8 |
| Muhlenbergia multiflora | Columbus | Poaceae | 8 |
| Muhlenbergia paniculata | (Nutt.) P.M.Peterson | Poaceae | 8 |
| Muhlenbergia racemosa | (Michx.) Britton, Sterns & Poggenb. | Poaceae | 8 |
| Muhlenbergia richardsonis | (Trin.) Rydb. | Poaceae | 8 |
| Muhlenbergia torreyi | (Kunth) Hitchc. ex Bush | Poaceae | 8 |
| Munroa pulchella | (Kunth) Amarilla | Poaceae | 8 |
| Munroa squarrosa | (Nutt.) Torr. | Poaceae | 8 |
| Musineon divaricatum | (Pursh) Nutt. | Apiaceae | 8 |
| Musineon tenuifolium | Nutt. | Apiaceae | 8 |
| Musineon vaginatum | Rydb. | Apiaceae | 8 |
| Myosotis asiatica | (Vestergr.) Schischk. & Serg. | Boraginaceae | 8 |
| Myosotis laxa | Lehm. | Boraginaceae | 8 |
| Myosotis verna | Nutt. | Boraginaceae | 8 |
| Myriophyllum quitense | Kunth | Haloragaceae | 8 |
| Myriophyllum sibiricum | Kom. | Haloragaceae | 8 |
| Myriophyllum verticillatum | L. | Haloragaceae | 8 |
| Nabalus racemosus | (Michx.) Hook. | Asteraceae | 8 |
| Najas flexilis | (Willd.) Rostk. & W.L.E.Schmidt | Hydrocharitaceae | 8 |
| Nassella viridula | (Trin.) Barkworth | Poaceae | 8 |
| Navarretia breweri | (A.Gray) Greene | Polemoniaceae | 8 |
| Navarretia intertexta | Hook. | Polemoniaceae | 8 |
| Nemacladus orientalis | (McVaugh) Morin | Campanulaceae | 8 |
| Nemophila breviflora | A.Gray | Hydrophyllaceae | 8 |
| Neoholmgrenia andina | (Nutt.) W.L.Wagner & Hoch | Onagraceae | 8 |
| Neokochia americana | (S.Watson) G.L.Chu & S.C.Sand. | Chenopodiaceae | 8 |
| Neottia borealis | (Morong) Szlach. | Orchidaceae | 8 |
| Neottia convallarioides | (Sw.) Rich. | Orchidaceae | 8 |
| Neottia cordata | (L.) Rich. | Orchidaceae | 8 |
| Nicotiana attenuata | Torr. ex S.Watson | Solanaceae | 8 |
| Noccaea fendleri | (A.Gray) Holub | Brassicaceae | 8 |
| Nothocalais cuspidata | (Pursh) Greene | Asteraceae | 8 |
| Nothocalais troximoides | (A.Gray) Greene | Asteraceae | 8 |
| Nuphar polysepala | Engelm. | Nymphaeaceae | 8 |
| Nuttallanthus texanus | (Scheele) D.A.Sutton | Plantaginaceae | 8 |
| Oenothera albicaulis | Nutt. ex Pursh | Onagraceae | 8 |
| Oenothera canescens | Torr. | Onagraceae | 8 |
| Oenothera cespitosa | Nutt. | Onagraceae | 8 |
| Oenothera coronopifolia | Torr. & A.Gray | Onagraceae | 8 |
| Oenothera curtiflora | W.L.Wagner & Hoch | Onagraceae | 8 |
| Oenothera flava | (A.Nelson) Garrett | Onagraceae | 8 |
| Oenothera glaucifolia | W.L.Wagner & Hoch | Onagraceae | 8 |
| Oenothera howardii | (A.Nelson) M.E.Jones ex Prain | Onagraceae | 8 |
| Oenothera laciniata | Hill | Onagraceae | 8 |
| Oenothera lavandulifolia | Torr. & A.Gray | Onagraceae | 8 |
| Oenothera nuttallii | Torr. & A.Gray | Onagraceae | 8 |
| Oenothera pallida | Lindl. | Onagraceae | 8 |
| Oenothera serrulata | Nutt. | Onagraceae | 8 |
| Oenothera suffrutescens | (Ser.) W.L.Wagner & Hoch | Onagraceae | 8 |
| Oenothera villosa | Thunb. | Onagraceae | 8 |
| Onoclea sensibilis | L. | Onocleaceae | 8 |
| Ophioglossum pusillum | Raf. | Ophioglossaceae | 8 |
| Opuntia fragilis | (Nutt.) Haw. | Cactaceae | 8 |
| Opuntia polyacantha | Haw. | Cactaceae | 8 |
| Opuntia tortispina | Engelm. & J.M.Bigelow | Cactaceae | 8 |
| Oreocarya caespitosa | A.Nelson | Boraginaceae | 8 |
| Oreocarya cana | A.Nelson | Boraginaceae | 8 |
| Oreocarya flava | A.Nelson | Boraginaceae | 8 |
| Oreocarya flavoculata | A.Nelson | Boraginaceae | 8 |
| Oreocarya glomerata | Greene | Boraginaceae | 8 |
| Oreocarya spiculifera | Piper | Boraginaceae | 8 |
| Oreocarya suffruticosa | (Torr.) Greene | Boraginaceae | 8 |
| Oreocarya thyrsiflora | Greene | Boraginaceae | 8 |
| Oreochrysum parryi | Rydb. | Asteraceae | 8 |
| Oreostemma alpigenum | (Torr. & A.Gray) Greene | Asteraceae | 8 |
| Orobanche corymbosa | (Rydb.) Ferris | Orobanchaceae | 8 |
| Orobanche fasciculata | Nutt. | Orobanchaceae | 8 |
| Orobanche ludoviciana | Nutt. | Orobanchaceae | 8 |
| Orobanche uniflora | L. | Orobanchaceae | 8 |
| Orthilia secunda | (L.) House | Ericaceae | 8 |
| Orthocarpus luteus | Nutt. | Orobanchaceae | 8 |
| Orthocarpus tenuifolius | (Pursh) Benth. | Orobanchaceae | 8 |
| Orthocarpus tolmiei | Hook. & Arn. | Orobanchaceae | 8 |
| Oryzopsis asperifolia | Michx. | Poaceae | 8 |
| Osmorhiza berteroi | DC. | Apiaceae | 8 |
| Osmorhiza depauperata | Phil. | Apiaceae | 8 |
| Osmorhiza longistylis | DC. | Apiaceae | 8 |
| Osmorhiza occidentalis | Torr. | Apiaceae | 8 |
| Ostrya virginiana | (Mill.) K.Koch | Betulaceae | 8 |
| Oxalis dillenii | Jacq. | Oxalidaceae | 8 |
| Oxybaphus nyctagineus | (Michx.) Sweet | Nyctaginaceae | 8 |
| Oxypolis fendleri | (A.Gray) A.Heller | Apiaceae | 8 |
| Oxyria digyna | (L.) Hill | Polygonaceae | 8 |
| Oxytheca dendroidea | Nutt. | Polygonaceae | 8 |
| Oxytropis besseyi | (Rydb.) Blank. | Fabaceae | 8 |
| Oxytropis borealis | DC. | Fabaceae | 8 |
| Oxytropis campestris | (L.) DC. | Fabaceae | 8 |
| Oxytropis deflexa | (Pall.) DC. | Fabaceae | 8 |
| Oxytropis lagopus | Nutt. | Fabaceae | 8 |
| Oxytropis lambertii | Pursh | Fabaceae | 8 |
| Oxytropis multiceps | Nutt. | Fabaceae | 8 |
| Oxytropis parryi | A.Gray | Fabaceae | 8 |
| Oxytropis podocarpa | A.Gray | Fabaceae | 8 |
| Oxytropis sericea | Nutt. | Fabaceae | 8 |
| Oxytropis splendens | Douglas | Fabaceae | 8 |
| Ozomelis stauropetala | (Piper) Rydb. | Saxifragaceae | 8 |
| Packera cana | (Hook.) W.A.Weber & Á.Löve | Asteraceae | 8 |
| Packera dimorphophylla | (Greene) W.A.Weber & Á.Löve | Asteraceae | 8 |
| Packera fendleri | (A.Gray) W.A.Weber & Á.Löve | Asteraceae | 8 |
| Packera indecora | (Greene) Á.Löve & D.Löve | Asteraceae | 8 |
| Packera pauciflora | (Pursh) Á.Löve & D.Löve | Asteraceae | 8 |
| Packera paupercula | (Michx.) Á.Löve & D.Löve | Asteraceae | 8 |
| Packera plattensis | (Nutt.) W.A.Weber & Á.Löve | Asteraceae | 8 |
| Packera pseudaurea | (Rydb.) W.A.Weber & Á.Löve | Asteraceae | 8 |
| Packera streptanthifolia | (Greene) W.A.Weber & Á.Löve | Asteraceae | 8 |
| Paeonia brownii | Douglas ex Hook. | Paeoniaceae | 8 |
| Palafoxia rosea | (Bush) Cory | Asteraceae | 8 |
| Panicum capillare | L. | Poaceae | 8 |
| Panicum virgatum | L. | Poaceae | 8 |
| Parietaria pensylvanica | Muhl. ex Willd. | Urticaceae | 8 |
| Parnassia fimbriata | K.D.Koenig | Celastraceae | 8 |
| Parnassia kotzebuei | Cham. ex Spreng. | Celastraceae | 8 |
| Parnassia palustris | L. | Celastraceae | 8 |
| Parnassia parviflora | DC. | Celastraceae | 8 |
| Paronychia depressa | (Torr. & A.Gray) Nutt. ex A.Nelson | Caryophyllaceae | 8 |
| Paronychia jamesii | Torr. & A.Gray | Caryophyllaceae | 8 |
| Paronychia pulvinata | A.Gray | Caryophyllaceae | 8 |
| Paronychia sessiliflora | Nutt. | Caryophyllaceae | 8 |
| Parthenocissus quinquefolia | (L.) Planch. | Vitaceae | 8 |
| Paxistima myrsinites | (Pursh) Raf. | Celastraceae | 8 |
| Pectiantia pentandra | (Hook.) Rydb. | Saxifragaceae | 8 |
| Pectis angustifolia | Torr. | Asteraceae | 8 |
| Pectocarya penicillata | (Hook. & Arn.) A.DC. | Boraginaceae | 8 |
| Pedicularis bracteosa | Benth. | Orobanchaceae | 8 |
| Pedicularis contorta | Benth. | Orobanchaceae | 8 |
| Pedicularis crenulata | Benth. | Orobanchaceae | 8 |
| Pedicularis cystopteridifolia | Rydb. | Orobanchaceae | 8 |
| Pedicularis groenlandica | Retz. | Orobanchaceae | 8 |
| Pedicularis oederi | Vahl | Orobanchaceae | 8 |
| Pedicularis parryi | A.Gray | Orobanchaceae | 8 |
| Pedicularis procera | A.Gray | Orobanchaceae | 8 |
| Pedicularis racemosa | Douglas ex Benth. | Orobanchaceae | 8 |
| Pediocactus simpsonii | (Engelm.) Britton & Rose | Cactaceae | 8 |
| Pediomelum argophyllum | (Pursh) J.W.Grimes | Fabaceae | 8 |
| Pediomelum esculentum | (Pursh) Rydb. | Fabaceae | 8 |
| Pediomelum hypogaeum | (Nutt.) Rydb. | Fabaceae | 8 |
| Pediomelum linearifolium | (Torr. & A.Gray) J.W.Grimes | Fabaceae | 8 |
| Pediomelum tenuiflorum | (Pursh) A.N.Egan | Fabaceae | 8 |
| Pelecyphora missouriensis | (Sweet) D.Aquino & Dan.Sánchez | Cactaceae | 8 |
| Pelecyphora vivipara | (Nutt.) D.Aquino & Dan.Sánchez | Cactaceae | 8 |
| Pellaea atropurpurea | (L.) Link | Pteridaceae | 8 |
| Pellaea gastonyi | Windham | Pteridaceae | 8 |
| Pellaea glabella | Mett. | Pteridaceae | 8 |
| Penstemon albidus | Nutt. | Plantaginaceae | 8 |
| Penstemon angustifolius | Nutt. ex Pursh | Plantaginaceae | 8 |
| Penstemon aridus | Rydb. | Plantaginaceae | 8 |
| Penstemon attenuatus | Douglas | Plantaginaceae | 8 |
| Penstemon bradburyi | Pursh | Plantaginaceae | 8 |
| Penstemon caespitosus | Nutt. ex A.Gray | Plantaginaceae | 8 |
| Penstemon cyananthus | Hook. | Plantaginaceae | 8 |
| Penstemon cyaneus | Pennell | Plantaginaceae | 8 |
| Penstemon deustus | Douglas | Plantaginaceae | 8 |
| Penstemon eatonii | A.Gray | Plantaginaceae | 8 |
| Penstemon eriantherus | Nutt. ex Pursh | Plantaginaceae | 8 |
| Penstemon fruticosus | (Pursh) Greene | Plantaginaceae | 8 |
| Penstemon glaber | Pursh | Plantaginaceae | 8 |
| Penstemon gracilis | Nutt. | Plantaginaceae | 8 |
| Penstemon humilis | Nutt. ex A.Gray | Plantaginaceae | 8 |
| Penstemon laricifolius | Hook. & Arn. | Plantaginaceae | 8 |
| Penstemon montanus | Greene | Plantaginaceae | 8 |
| Penstemon nitidus | Douglas ex Benth. | Plantaginaceae | 8 |
| Penstemon procerus | Douglas ex Graham | Plantaginaceae | 8 |
| Penstemon radicosus | A.Nelson | Plantaginaceae | 8 |
| Penstemon rydbergii | A.Nelson | Plantaginaceae | 8 |
| Penstemon secundiflorus | Benth. | Plantaginaceae | 8 |
| Penstemon strictus | Benth. | Plantaginaceae | 8 |
| Penstemon subglaber | Rydb. | Plantaginaceae | 8 |
| Penstemon virens | Pennell ex Rydb. | Plantaginaceae | 8 |
| Penstemon virgatus | A.Gray | Plantaginaceae | 8 |
| Penstemon watsonii | A.Gray | Plantaginaceae | 8 |
| Penstemon whippleanus | A.Gray | Plantaginaceae | 8 |
| Perideridia bolanderi | A.Nelson & J.F.Macbr. | Apiaceae | 8 |
| Persicaria amphibia | (L.) Delarbre | Polygonaceae | 8 |
| Persicaria bicornis | (Raf.) Nieuwl. | Polygonaceae | 8 |
| Persicaria lapathifolia | (L.) Delarbre | Polygonaceae | 8 |
| Persicaria pensylvanica | (L.) M.Gómez | Polygonaceae | 8 |
| Persicaria punctata | Small | Polygonaceae | 8 |
| Persicaria vivipara | (L.) Ronse Decr. | Polygonaceae | 8 |
| Petasites frigidus | (L.) Fr. | Asteraceae | 8 |
| Petradoria pumila | (Nutt.) Greene | Asteraceae | 8 |
| Phacelia alba | Rydb. | Hydrophyllaceae | 8 |
| Phacelia franklinii | (R.Br.) A.Gray | Hydrophyllaceae | 8 |
| Phacelia glandulifera | Piper | Hydrophyllaceae | 8 |
| Phacelia hastata | Douglas ex Lehm. | Hydrophyllaceae | 8 |
| Phacelia heterophylla | Pursh | Hydrophyllaceae | 8 |
| Phacelia incana | Brand | Hydrophyllaceae | 8 |
| Phacelia ivesiana | Torr. | Hydrophyllaceae | 8 |
| Phacelia linearis | (Pursh) Holz. | Hydrophyllaceae | 8 |
| Phacelia sericea | (Graham) A.Gray | Hydrophyllaceae | 8 |
| Phalaris arundinacea | L. | Poaceae | 8 |
| Phemeranthus parviflorus | (Nutt.) Kiger | Montiaceae | 8 |
| Philadelphus microphyllus | A.Gray | Hydrangeaceae | 8 |
| Phippsia algida | (Sol.) R.Br. | Poaceae | 8 |
| Phleum alpinum | L. | Poaceae | 8 |
| Phlox alyssifolia | Greene | Polemoniaceae | 8 |
| Phlox andicola | (Britton) E.E.Nelson | Polemoniaceae | 8 |
| Phlox austromontana | Coville | Polemoniaceae | 8 |
| Phlox diffusa | Benth. | Polemoniaceae | 8 |
| Phlox hoodii | Richardson | Polemoniaceae | 8 |
| Phlox longifolia | Nutt. | Polemoniaceae | 8 |
| Phlox multiflora | A.Nelson | Polemoniaceae | 8 |
| Phlox pulvinata | (Wherry) Cronquist | Polemoniaceae | 8 |
| Phragmites australis | (Cav.) Steud. | Poaceae | 8 |
| Phryma leptostachya | L. | Phrymaceae | 8 |
| Phyla cuneifolia | (Torr.) Greene | Verbenaceae | 8 |
| Phyllodoce empetriformis | (Sm.) D.Don | Ericaceae | 8 |
| Phyllodoce glanduliflora | (Hook.) Coville | Ericaceae | 8 |
| Physalis hederifolia | A.Gray | Solanaceae | 8 |
| Physalis heterophylla | Nees | Solanaceae | 8 |
| Physalis longifolia | Nutt. | Solanaceae | 8 |
| Physalis pumila | Nutt. | Solanaceae | 8 |
| Physalis virginiana | Mill. | Solanaceae | 8 |
| Physaria acutifolia | Rydb. | Brassicaceae | 8 |
| Physaria arenosa | (Richardson) O'Kane & Al-Shehbaz | Brassicaceae | 8 |
| Physaria didymocarpa | (Hook.) A.Gray | Brassicaceae | 8 |
| Physaria ludoviciana | (Nutt.) O'Kane & Al-Shehbaz | Brassicaceae | 8 |
| Physaria montana | (A.Gray) Greene | Brassicaceae | 8 |
| Physaria spatulata | (Rydb.) Grady & O'Kane | Brassicaceae | 8 |
| Physocarpus alternans | (M.E.Jones) J.T.Howell | Rosaceae | 8 |
| Physocarpus malvaceus | (Greene) Kuntze | Rosaceae | 8 |
| Physocarpus monogynus | (Torr.) J.M.Coult. | Rosaceae | 8 |
| Physostegia parviflora | Nutt. ex A.Gray | Lamiaceae | 8 |
| Picea engelmannii | Parry ex Engelm. | Pinaceae | 8 |
| Picea glauca | (Moench) Voss | Pinaceae | 8 |
| Picea pungens | Engelm. | Pinaceae | 8 |
| Picradeniopsis oppositifolia | (Nutt.) Rydb. | Asteraceae | 8 |
| Picrothamnus desertorum | Nutt. | Asteraceae | 8 |
| Pinus albicaulis | Engelm. | Pinaceae | 8 |
| Pinus contorta | Douglas ex Loudon | Pinaceae | 8 |
| Pinus edulis | Engelm. | Pinaceae | 8 |
| Pinus flexilis | E.James | Pinaceae | 8 |
| Pinus ponderosa | Douglas ex C.Lawson | Pinaceae | 8 |
| Piptatheropsis exigua | (Thurb.) Romasch., P.M.Peterson & Soreng | Poaceae | 8 |
| Piptatheropsis micrantha | (Trin. & Rupr.) Romasch., P.M.Peterson & Soreng | Poaceae | 8 |
| Piptatheropsis pungens | (Torr. ex Spreng.) Romasch., P.M.Peterson & Soreng | Poaceae | 8 |
| Plagiobothrys scouleri | (Hook. & Arn.) I.M.Johnst. | Boraginaceae | 8 |
| Plantago elongata | Pursh | Plantaginaceae | 8 |
| Plantago patagonica | Jacq. | Plantaginaceae | 8 |
| Platanthera aquilonis | Sheviak | Orchidaceae | 8 |
| Platanthera dilatata | (Pursh) Lindl. ex L.C.Beck | Orchidaceae | 8 |
| Platanthera huronensis | Lindl. | Orchidaceae | 8 |
| Platanthera obtusata | (Banks ex Pursh) Lindl. | Orchidaceae | 8 |
| Platanthera orbiculata | (Pursh) Lindl. | Orchidaceae | 8 |
| Platanthera purpurascens | (Rydb.) Sheviak & W.F.Jenn. | Orchidaceae | 8 |
| Platanthera stricta | Lindl. | Orchidaceae | 8 |
| Platanthera unalascensis | (Spreng.) Kurtz | Orchidaceae | 8 |
| Platyschkuhria integrifolia | (A.Gray) Rydb. | Asteraceae | 8 |
| Poa alpina | L. | Poaceae | 8 |
| Poa arctica | R.Br. | Poaceae | 8 |
| Poa cusickii | Vasey | Poaceae | 8 |
| Poa fendleriana | (Steud.) Vasey | Poaceae | 8 |
| Poa glauca | Vahl | Poaceae | 8 |
| Poa interior | Rydb. | Poaceae | 8 |
| Poa nemoralis | L. | Poaceae | 8 |
| Poa palustris | L. | Poaceae | 8 |
| Poa pratensis | L. | Poaceae | 8 |
| Poa secunda | J.Presl | Poaceae | 8 |
| Poa wheeleri | Vasey | Poaceae | 8 |
| Polemonium foliosissimum | A.Gray | Polemoniaceae | 8 |
| Polemonium micranthum | Benth. | Polemoniaceae | 8 |
| Polemonium occidentale | Greene | Polemoniaceae | 8 |
| Polemonium pulcherrimum | Hook. | Polemoniaceae | 8 |
| Polemonium viscosum | Nutt. | Polemoniaceae | 8 |
| Polygala senega | L. | Polygalaceae | 8 |
| Polygonatum biflorum | (Walter) Elliott | Asparagaceae | 8 |
| Polygonum achoreum | S.F.Blake | Polygonaceae | 8 |
| Polygonum aviculare | L. | Polygonaceae | 8 |
| Polygonum minimum | S.Watson | Polygonaceae | 8 |
| Polygonum spergulariiforme | Meisn. ex Small | Polygonaceae | 8 |
| Polygonum tenue | Michx. | Polygonaceae | 8 |
| Polypodium hesperium | Maxon | Polypodiaceae | 8 |
| Polypogon interruptus | Kunth | Poaceae | 8 |
| Polystichum lonchitis | (L.) Roth | Dryopteridaceae | 8 |
| Polystichum scopulinum | (D.C.Eaton) Maxon | Dryopteridaceae | 8 |
| Populus angustifolia | E.James | Salicaceae | 8 |
| Populus balsamifera | L. | Salicaceae | 8 |
| Populus deltoides | W.Bartram ex Marshall | Salicaceae | 8 |
| Populus tremuloides | Michx. | Salicaceae | 8 |
| Porterella carnosula | (Hook. & Arn.) Torr. | Campanulaceae | 8 |
| Potamogeton alpinus | Balb. | Potamogetonaceae | 8 |
| Potamogeton amplifolius | Tuck. | Potamogetonaceae | 8 |
| Potamogeton berchtoldii | Fieber | Potamogetonaceae | 8 |
| Potamogeton diversifolius | Raf. | Potamogetonaceae | 8 |
| Potamogeton epihydrus | Raf. | Potamogetonaceae | 8 |
| Potamogeton foliosus | Raf. | Potamogetonaceae | 8 |
| Potamogeton friesii | Rupr. | Potamogetonaceae | 8 |
| Potamogeton gramineus | L. | Potamogetonaceae | 8 |
| Potamogeton illinoensis | Morong | Potamogetonaceae | 8 |
| Potamogeton natans | L. | Potamogetonaceae | 8 |
| Potamogeton nodosus | Poir. | Potamogetonaceae | 8 |
| Potamogeton obtusifolius | Mert. & W.D.J.Koch | Potamogetonaceae | 8 |
| Potamogeton praelongus | Wulfen | Potamogetonaceae | 8 |
| Potamogeton pusillus | L. | Potamogetonaceae | 8 |
| Potamogeton richardsonii | Rydb. | Potamogetonaceae | 8 |
| Potamogeton robbinsii | Oakes | Potamogetonaceae | 8 |
| Potamogeton strictifolius | A.Benn. | Potamogetonaceae | 8 |
| Potamogeton zosteriformis | Fernald | Potamogetonaceae | 8 |
| Potentilla bicrenata | Rydb. | Rosaceae | 8 |
| Potentilla biennis | Greene | Rosaceae | 8 |
| Potentilla brevifolia | Nutt. | Rosaceae | 8 |
| Potentilla concinna | Richardson | Rosaceae | 8 |
| Potentilla douglasii | Greene | Rosaceae | 8 |
| Potentilla effusa | Douglas ex Lehm. | Rosaceae | 8 |
| Potentilla flabellifolia | Hook. ex Torr. & A.Gray | Rosaceae | 8 |
| Potentilla glaucophylla | Lehm. | Rosaceae | 8 |
| Potentilla gordonii | (Hook.) Greene | Rosaceae | 8 |
| Potentilla gracilis | Douglas ex Hook. | Rosaceae | 8 |
| Potentilla hippiana | Lehm. | Rosaceae | 8 |
| Potentilla hyparctica | Malte | Rosaceae | 8 |
| Potentilla litoralis | Rydb. | Rosaceae | 8 |
| Potentilla nivea | L. | Rosaceae | 8 |
| Potentilla norvegica | L. | Rosaceae | 8 |
| Potentilla ovina | Macoun | Rosaceae | 8 |
| Potentilla pensylvanica | L. | Rosaceae | 8 |
| Potentilla pulcherrima | Lehm. | Rosaceae | 8 |
| Potentilla rivalis | Nutt. | Rosaceae | 8 |
| Potentilla supina | L. | Rosaceae | 8 |
| Primula conjugens | (Greene) A.R.Mast & Reveal | Primulaceae | 8 |
| Primula egaliksensis | Wormsk. | Primulaceae | 8 |
| Primula incana | M.E.Jones | Primulaceae | 8 |
| Primula jeffreyi | (Van Houtte) A.R.Mast & Reveal | Primulaceae | 8 |
| Primula parryi | A.Gray | Primulaceae | 8 |
| Primula pauciflora | (Greene) A.R.Mast & Reveal | Primulaceae | 8 |
| Proboscidea louisianica | (Mill.) Thell. | Martyniaceae | 8 |
| Prosartes trachycarpa | S.Watson | Liliaceae | 8 |
| Prunella vulgaris | L. | Lamiaceae | 8 |
| Prunus americana | Marshall | Rosaceae | 8 |
| Prunus pensylvanica | L.f. | Rosaceae | 8 |
| Prunus pumila | L. | Rosaceae | 8 |
| Prunus virginiana | L. | Rosaceae | 8 |
| Pseudognaphalium canescens | (DC.) Anderb. | Asteraceae | 8 |
| Pseudognaphalium macounii | (Greene) Kartesz | Asteraceae | 8 |
| Pseudognaphalium stramineum | (Kunth) Anderb. | Asteraceae | 8 |
| Pseudoroegneria spicata | (Pursh) Á.Löve | Poaceae | 8 |
| Pseudotsuga menziesii | (Mirb.) Franco | Pinaceae | 8 |
| Psilocarphus brevissimus | Nutt. | Asteraceae | 8 |
| Pteridium aquilinum | (L.) Kuhn | Dennstaedtiaceae | 8 |
| Pterospora andromedea | Nutt. | Ericaceae | 8 |
| Puccinellia lemmonii | (Vasey) Scribn. | Poaceae | 8 |
| Puccinellia nuttalliana | (Schult.) Hitchc. | Poaceae | 8 |
| Pulsatilla nuttalliana | (DC.) Spreng. | Ranunculaceae | 8 |
| Purshia tridentata | (Pursh) DC. | Rosaceae | 8 |
| Pyrola asarifolia | Michx. | Ericaceae | 8 |
| Pyrola chlorantha | Sw. | Ericaceae | 8 |
| Pyrola elliptica | Nutt. | Ericaceae | 8 |
| Pyrola minor | L. | Ericaceae | 8 |
| Pyrola picta | Sm. | Ericaceae | 8 |
| Pyrrocoma carthamoides | Hook. | Asteraceae | 8 |
| Pyrrocoma clementis | Rydb. | Asteraceae | 8 |
| Pyrrocoma crocea | (A.Gray) Greene | Asteraceae | 8 |
| Quercus gambelii | Nutt. | Fagaceae | 8 |
| Quercus macrocarpa | Michx. | Fagaceae | 8 |
| Ranunculus abortivus | L. | Ranunculaceae | 8 |
| Ranunculus adoneus | A.Gray | Ranunculaceae | 8 |
| Ranunculus alismifolius | Geyer ex Benth. | Ranunculaceae | 8 |
| Ranunculus cardiophyllus | Hook. | Ranunculaceae | 8 |
| Ranunculus eschscholtzii | Schltdl. | Ranunculaceae | 8 |
| Ranunculus flabellaris | Raf. | Ranunculaceae | 8 |
| Ranunculus flammula | L. | Ranunculaceae | 8 |
| Ranunculus glaberrimus | Hook. | Ranunculaceae | 8 |
| Ranunculus gmelinii | DC. | Ranunculaceae | 8 |
| Ranunculus hyperboreus | Rottb. | Ranunculaceae | 8 |
| Ranunculus inamoenus | Greene | Ranunculaceae | 8 |
| Ranunculus macounii | Britton | Ranunculaceae | 8 |
| Ranunculus minimus | E.H.L.Krause | Ranunculaceae | 8 |
| Ranunculus orthorhynchus | Hook. | Ranunculaceae | 8 |
| Ranunculus pensylvanicus | L.f. | Ranunculaceae | 8 |
| Ranunculus pygmaeus | Wahlenb. | Ranunculaceae | 8 |
| Ranunculus reptans | L. | Ranunculaceae | 8 |
| Ranunculus sceleratus | L. | Ranunculaceae | 8 |
| Ranunculus trichophyllus | Chaix | Ranunculaceae | 8 |
| Ranunculus uncinatus | D.Don ex G.Don | Ranunculaceae | 8 |
| Ratibida columnifera | (Nutt.) Wooton & Standl. | Asteraceae | 8 |
| Rhamnus alnifolia | L'Hér. | Rhamnaceae | 8 |
| Rhodiola integrifolia | Raf. | Crassulaceae | 8 |
| Rhodiola rhodantha | (A.Gray) H.Jacobsen | Crassulaceae | 8 |
| Rhododendron columbianum | (Piper) Harmaja | Ericaceae | 8 |
| Rhododendron menziesii | Craven | Ericaceae | 8 |
| Rhus aromatica | Aiton | Anacardiaceae | 8 |
| Rhus glabra | L. | Anacardiaceae | 8 |
| Ribes americanum | Mill. | Grossulariaceae | 8 |
| Ribes aureum | Pursh | Grossulariaceae | 8 |
| Ribes cereum | Douglas | Grossulariaceae | 8 |
| Ribes hudsonianum | Richardson | Grossulariaceae | 8 |
| Ribes inerme | Rydb. | Grossulariaceae | 8 |
| Ribes lacustre | (Pers.) Poir. | Grossulariaceae | 8 |
| Ribes montigenum | McClatchie | Grossulariaceae | 8 |
| Ribes oxyacanthoides | L. | Grossulariaceae | 8 |
| Ribes viscosissimum | Pursh | Grossulariaceae | 8 |
| Robinia neomexicana | A.Gray | Fabaceae | 8 |
| Rorippa curvisiliqua | (Hook.) Bessey ex Britton | Brassicaceae | 8 |
| Rorippa palustris | (L.) Besser | Brassicaceae | 8 |
| Rosa acicularis | Lindl. | Rosaceae | 8 |
| Rosa arkansana | Porter | Rosaceae | 8 |
| Rosa nutkana | C.Presl | Rosaceae | 8 |
| Rosa woodsii | Lindl. | Rosaceae | 8 |
| Rubus arcticus | L. | Rosaceae | 8 |
| Rubus deliciosus | Torr. | Rosaceae | 8 |
| Rubus idaeus | L. | Rosaceae | 8 |
| Rubus parviflorus | Nutt. | Rosaceae | 8 |
| Rubus pubescens | Raf. | Rosaceae | 8 |
| Rudbeckia hirta | L. | Asteraceae | 8 |
| Rudbeckia laciniata | L. | Asteraceae | 8 |
| Rudbeckia occidentalis | Nutt. | Asteraceae | 8 |
| Rumex alpestris | Jacq. | Polygonaceae | 8 |
| Rumex altissimus | Alph.Wood | Polygonaceae | 8 |
| Rumex hymenosepalus | Torr. | Polygonaceae | 8 |
| Rumex maritimus | L. | Polygonaceae | 8 |
| Rumex occidentalis | S.Watson | Polygonaceae | 8 |
| Rumex paucifolius | Nutt. | Polygonaceae | 8 |
| Rumex triangulivalvis | (Danser) Rech.f. | Polygonaceae | 8 |
| Rumex venosus | Pursh | Polygonaceae | 8 |
| Ruppia cirrhosa | (Petagna) Grande | Ruppiaceae | 8 |
| Sabulina austromontana | (S.J.Wolf & Packer) Dillenb. & Kadereit | Caryophyllaceae | 8 |
| Sabulina nuttallii | (Pax) Dillenb. & Kadereit | Caryophyllaceae | 8 |
| Sabulina rubella | (Wahlenb.) Dillenb. & Kadereit | Caryophyllaceae | 8 |
| Sagina saginoides | (L.) H.Karst. | Caryophyllaceae | 8 |
| Sagittaria cuneata | E.Sheld. | Alismataceae | 8 |
| Salicornia rubra | A.Nelson | Chenopodiaceae | 8 |
| Salix amygdaloides | Andersson | Salicaceae | 8 |
| Salix barclayi | Andersson | Salicaceae | 8 |
| Salix barrattiana | Hook. | Salicaceae | 8 |
| Salix bebbiana | Sarg. | Salicaceae | 8 |
| Salix boothii | Dorn | Salicaceae | 8 |
| Salix brachycarpa | Nutt. | Salicaceae | 8 |
| Salix candida | Flüggé ex Willd. | Salicaceae | 8 |
| Salix discolor | Muhl. | Salicaceae | 8 |
| Salix drummondiana | Barratt | Salicaceae | 8 |
| Salix eastwoodiae | Cockerell ex A.Heller | Salicaceae | 8 |
| Salix exigua | Nutt. | Salicaceae | 8 |
| Salix geyeriana | Andersson | Salicaceae | 8 |
| Salix glauca | L. | Salicaceae | 8 |
| Salix interior | Rowlee | Salicaceae | 8 |
| Salix lasiandra | Benth. | Salicaceae | 8 |
| Salix lucida | Muhl. | Salicaceae | 8 |
| Salix lutea | Nutt. | Salicaceae | 8 |
| Salix melanopsis | Nutt. | Salicaceae | 8 |
| Salix myrtillifolia | Andersson | Salicaceae | 8 |
| Salix nivalis | Hook. | Salicaceae | 8 |
| Salix petrophila | Rydb. | Salicaceae | 8 |
| Salix planifolia | Pursh | Salicaceae | 8 |
| Salix pseudomonticola | C.R.Ball | Salicaceae | 8 |
| Salix scouleriana | Barratt | Salicaceae | 8 |
| Salix serissima | (L.H.Bailey ex Arthur) Fernald | Salicaceae | 8 |
| Salix wolfii | Bebb | Salicaceae | 8 |
| Sambucus canadensis | L. | Viburnaceae | 8 |
| Sambucus cerulea | Raf. | Viburnaceae | 8 |
| Sambucus racemosa | L. | Viburnaceae | 8 |
| Sanguisorba occidentalis | Nutt. | Rosaceae | 8 |
| Sanicula canadensis | L. | Apiaceae | 8 |
| Sanicula graveolens | Poepp. ex DC. | Apiaceae | 8 |
| Sanicula marilandica | L. | Apiaceae | 8 |
| Sarcobatus vermiculatus | (Hook.) Torr. | Sarcobataceae | 8 |
| Saxifraga adscendens | L. | Saxifragaceae | 8 |
| Saxifraga bronchialis | L. | Saxifragaceae | 8 |
| Saxifraga cernua | L. | Saxifragaceae | 8 |
| Saxifraga cespitosa | L. | Saxifragaceae | 8 |
| Saxifraga chrysantha | A.Gray | Saxifragaceae | 8 |
| Saxifraga flagellaris | Willd. ex Sternb. | Saxifragaceae | 8 |
| Saxifraga hyperborea | R.Br. | Saxifragaceae | 8 |
| Saxifraga oppositifolia | L. | Saxifragaceae | 8 |
| Sceptridium multifidum | (S.G.Gmel.) M.Nishida | Ophioglossaceae | 8 |
| Schizachne purpurascens | (Torr.) Swallen | Poaceae | 8 |
| Schizachyrium scoparium | (Michx.) Nash | Poaceae | 8 |
| Schoenoplectus acutus | (Muhl. ex Bigelow) Á.Löve & D.Löve | Cyperaceae | 8 |
| Schoenoplectus americanus | (Pers.) Volkart | Cyperaceae | 8 |
| Schoenoplectus heterochaetus | (Chase) Soják | Cyperaceae | 8 |
| Schoenoplectus pungens | (Vahl) Palla | Cyperaceae | 8 |
| Schoenoplectus tabernaemontani | (C.C.Gmel.) Palla | Cyperaceae | 8 |
| Scirpus atrocinctus | Fernald | Cyperaceae | 8 |
| Scirpus microcarpus | J.Presl & C.Presl | Cyperaceae | 8 |
| Scrophularia lanceolata | Pursh | Scrophulariaceae | 8 |
| Scutellaria brittonii | Porter | Lamiaceae | 8 |
| Scutellaria galericulata | L. | Lamiaceae | 8 |
| Sedum debile | S.Watson | Crassulaceae | 8 |
| Sedum lanceolatum | Torr. | Crassulaceae | 8 |
| Sedum stenopetalum | Pursh | Crassulaceae | 8 |
| Selaginella longipila | Hieron. | Selaginellaceae | 8 |
| Selaginella mutica | D.C.Eaton | Selaginellaceae | 8 |
| Selaginella rupestris | (L.) Spring | Selaginellaceae | 8 |
| Selaginella scopulorum | Maxon | Selaginellaceae | 8 |
| Selaginella spinulosa | A.Braun ex Döll | Selaginellaceae | 8 |
| Selaginella standleyi | Maxon | Selaginellaceae | 8 |
| Selaginella underwoodii | Hieron. | Selaginellaceae | 8 |
| Selaginella watsonii | Underw. | Selaginellaceae | 8 |
| Senecio amplectens | A.Gray | Asteraceae | 8 |
| Senecio atratus | Greene | Asteraceae | 8 |
| Senecio bigelovii | A.Gray | Asteraceae | 8 |
| Senecio crassulus | A.Gray | Asteraceae | 8 |
| Senecio eremophilus | Richardson | Asteraceae | 8 |
| Senecio fremontii | Torr. & A.Gray | Asteraceae | 8 |
| Senecio hydrophiloides | Rydb. | Asteraceae | 8 |
| Senecio hydrophilus | Nutt. | Asteraceae | 8 |
| Senecio integerrimus | Nutt. | Asteraceae | 8 |
| Senecio lugens | Richardson | Asteraceae | 8 |
| Senecio rapifolius | Nutt. | Asteraceae | 8 |
| Senecio serra | Hook. | Asteraceae | 8 |
| Senecio spartioides | Torr. & A.Gray | Asteraceae | 8 |
| Senecio triangularis | Hook. | Asteraceae | 8 |
| Shepherdia argentea | (Pursh) Nutt. | Elaeagnaceae | 8 |
| Shepherdia canadensis | (L.) Nutt. | Elaeagnaceae | 8 |
| Shoshonea pulvinata | Evert & Constance | Apiaceae | 8 |
| Sibbaldia procumbens | L. | Rosaceae | 8 |
| Sidalcea candida | A.Gray | Malvaceae | 8 |
| Sidalcea neomexicana | A.Gray | Malvaceae | 8 |
| Sidalcea oregana | (Nutt. ex Torr. & A.Gray) A.Gray | Malvaceae | 8 |
| Silene acaulis | (L.) Jacq. | Caryophyllaceae | 8 |
| Silene antirrhina | L. | Caryophyllaceae | 8 |
| Silene douglasii | Hook. | Caryophyllaceae | 8 |
| Silene drummondii | Hook. | Caryophyllaceae | 8 |
| Silene menziesii | Hook. | Caryophyllaceae | 8 |
| Silene oregana | S.Watson | Caryophyllaceae | 8 |
| Silene parryi | (S.Watson) C.L.Hitchc. & Maguire | Caryophyllaceae | 8 |
| Silene repens | Patrin | Caryophyllaceae | 8 |
| Silene scouleri | Hook. | Caryophyllaceae | 8 |
| Silene uralensis | (Rupr.) Bocquet | Caryophyllaceae | 8 |
| Silphium integrifolium | Michx. | Asteraceae | 8 |
| Sisyrinchium idahoense | E.P.Bicknell | Iridaceae | 8 |
| Sisyrinchium montanum | Greene | Iridaceae | 8 |
| Sium suave | Walter | Apiaceae | 8 |
| Smelowskia americana | Rydb. | Brassicaceae | 8 |
| Solanum emulans | Raf. | Solanaceae | 8 |
| Solanum rostratum | Dunal | Solanaceae | 8 |
| Solanum triflorum | Nutt. | Solanaceae | 8 |
| Solidago altissima | L. | Asteraceae | 8 |
| Solidago canadensis | L. | Asteraceae | 8 |
| Solidago elongata | Nutt. | Asteraceae | 8 |
| Solidago gigantea | Aiton | Asteraceae | 8 |
| Solidago lepida | DC. | Asteraceae | 8 |
| Solidago missouriensis | Nutt. | Asteraceae | 8 |
| Solidago multiradiata | Aiton | Asteraceae | 8 |
| Solidago ptarmicoides | (Torr. & A.Gray) B.Boivin | Asteraceae | 8 |
| Solidago rigida | L. | Asteraceae | 8 |
| Solidago simplex | Kunth | Asteraceae | 8 |
| Solidago velutina | DC. | Asteraceae | 8 |
| Sophora nuttalliana | B.L.Turner | Fabaceae | 8 |
| Sorbus scopulina | Greene | Rosaceae | 8 |
| Sorghastrum nutans | (L.) Nash | Poaceae | 8 |
| Sparganium angustifolium | Michx. | Typhaceae | 8 |
| Sparganium emersum | Rehmann | Typhaceae | 8 |
| Sparganium eurycarpum | Engelm. | Typhaceae | 8 |
| Sparganium natans | L. | Typhaceae | 8 |
| Spergularia marina | (L.) Besser | Caryophyllaceae | 8 |
| Sphaeralcea coccinea | (Nutt.) Rydb. | Malvaceae | 8 |
| Sphaeralcea munroana | (Douglas ex Lindl.) Spach | Malvaceae | 8 |
| Sphenopholis intermedia | (Rydb.) Rydb. | Poaceae | 8 |
| Sphenopholis obtusata | (Michx.) Scribn. | Poaceae | 8 |
| Spinulum annotinum | (L.) A.Haines | Lycopodiaceae | 8 |
| Spiraea lucida | Douglas ex Greene | Rosaceae | 8 |
| Spiraea splendens | Baumann ex K.Koch | Rosaceae | 8 |
| Spiranthes diluvialis | Sheviak | Orchidaceae | 8 |
| Spiranthes romanzoffiana | Cham. | Orchidaceae | 8 |
| Spirodela polyrhiza | (L.) Schleid. | Araceae | 8 |
| Sporobolus airoides | (Torr.) Torr. | Poaceae | 8 |
| Sporobolus compositus | (Poir.) Merr. | Poaceae | 8 |
| Sporobolus cryptandrus | (Torr.) A.Gray | Poaceae | 8 |
| Sporobolus heterolepis | (A.Gray) A.Gray | Poaceae | 8 |
| Sporobolus hookerianus | P.M.Peterson & Saarela | Poaceae | 8 |
| Sporobolus michauxianus | (Hitchc.) P.M.Peterson & Saarela | Poaceae | 8 |
| Sporobolus neglectus | Nash | Poaceae | 8 |
| Sporobolus rigidus | (Buckley) P.M.Peterson | Poaceae | 8 |
| Stachys pilosa | Nutt. | Lamiaceae | 8 |
| Stanleya pinnata | (Pursh) Britton | Brassicaceae | 8 |
| Stanleya tomentosa | Parry | Brassicaceae | 8 |
| Stanleya viridiflora | Nutt. | Brassicaceae | 8 |
| Stellaria borealis | Bigelow | Caryophyllaceae | 8 |
| Stellaria crassifolia | Ehrh. | Caryophyllaceae | 8 |
| Stellaria longifolia | Muhl. ex Willd. | Caryophyllaceae | 8 |
| Stellaria longipes | Goldie | Caryophyllaceae | 8 |
| Stenogonum salsuginosum | Nutt. | Polygonaceae | 8 |
| Stenotus acaulis | (Nutt.) Nutt. | Asteraceae | 8 |
| Stenotus armerioides | Nutt. | Asteraceae | 8 |
| Stephanomeria pauciflora | (Torr.) A.Nelson | Asteraceae | 8 |
| Stephanomeria runcinata | Nutt. | Asteraceae | 8 |
| Streptanthus cordatus | Nutt. | Brassicaceae | 8 |
| Streptanthus crassicaulis | Torr. | Brassicaceae | 8 |
| Streptanthus longirostris | (S.Watson) S.Watson | Brassicaceae | 8 |
| Streptopus amplexifolius | (L.) DC. | Liliaceae | 8 |
| Stuckenia filiformis | (Pers.) Börner | Potamogetonaceae | 8 |
| Stuckenia pectinata | (L.) Börner | Potamogetonaceae | 8 |
| Suaeda calceoliformis | (Hook.) Moq. | Chenopodiaceae | 8 |
| Suaeda nigra | (Raf.) J.F.Macbr. | Chenopodiaceae | 8 |
| Subularia aquatica | L. | Brassicaceae | 8 |
| Swertia perennis | L. | Gentianaceae | 8 |
| Symphoricarpos albus | (L.) S.F.Blake | Caprifoliaceae | 8 |
| Symphoricarpos occidentalis | (R.Br.) Hook. | Caprifoliaceae | 8 |
| Symphoricarpos rotundifolius | A.Gray | Caprifoliaceae | 8 |
| Symphyotrichum ascendens | (Lindl.) G.L.Nesom | Asteraceae | 8 |
| Symphyotrichum boreale | (Torr. & A.Gray) Á.Löve & D.Löve | Asteraceae | 8 |
| Symphyotrichum campestre | (Nutt.) G.L.Nesom | Asteraceae | 8 |
| Symphyotrichum ciliatum | (Ledeb.) G.L.Nesom | Asteraceae | 8 |
| Symphyotrichum eatonii | (A.Gray) G.L.Nesom | Asteraceae | 8 |
| Symphyotrichum ericoides | (L.) G.L.Nesom | Asteraceae | 8 |
| Symphyotrichum falcatum | (Lindl.) G.L.Nesom | Asteraceae | 8 |
| Symphyotrichum foliaceum | (Lindl. ex DC.) G.L.Nesom | Asteraceae | 8 |
| Symphyotrichum frondosum | (Nutt.) G.L.Nesom | Asteraceae | 8 |
| Symphyotrichum laeve | (L.) Á.Löve & D.Löve | Asteraceae | 8 |
| Symphyotrichum lanceolatum | (Willd.) G.L.Nesom | Asteraceae | 8 |
| Symphyotrichum novae-angliae | (L.) G.L.Nesom | Asteraceae | 8 |
| Symphyotrichum oblongifolium | (Nutt.) G.L.Nesom | Asteraceae | 8 |
| Taraxia subacaulis | Rydb. | Onagraceae | 8 |
| Telesonix heucheriformis | Rydb. | Saxifragaceae | 8 |
| Tetradymia canescens | DC. | Asteraceae | 8 |
| Tetradymia spinosa | Hook. & Arn. | Asteraceae | 8 |
| Tetraneuris acaulis | Greene | Asteraceae | 8 |
| Tetraneuris torreyana | (Nutt.) Greene | Asteraceae | 8 |
| Teucrium canadense | L. | Lamiaceae | 8 |
| Thalictrum alpinum | L. | Ranunculaceae | 8 |
| Thalictrum dasycarpum | Fisch., C.A.Mey. & Avé-Lall. | Ranunculaceae | 8 |
| Thalictrum fendleri | Engelm. ex A.Gray | Ranunculaceae | 8 |
| Thalictrum occidentale | A.Gray | Ranunculaceae | 8 |
| Thalictrum revolutum | DC. | Ranunculaceae | 8 |
| Thalictrum sparsiflorum | Turcz. ex Fisch. & C.A.Mey. | Ranunculaceae | 8 |
| Thalictrum venulosum | Trel. | Ranunculaceae | 8 |
| Thelesperma filifolium | (Hook.) A.Gray | Asteraceae | 8 |
| Thelesperma megapotamicum | (Spreng.) Kuntze | Asteraceae | 8 |
| Thelesperma subnudum | A.Gray | Asteraceae | 8 |
| Thelypodium integrifolium | (Nutt.) Endl. | Brassicaceae | 8 |
| Thermopsis divaricarpa | A.Nelson | Fabaceae | 8 |
| Thermopsis montana | Nutt. | Fabaceae | 8 |
| Thermopsis rhombifolia | (Pursh) Richardson | Fabaceae | 8 |
| Tiquilia nuttallii | (Hook.) A.T.Richardson | Ehretiaceae | 8 |
| Tomostima reptans | (Lam.) Al-Shehbaz, M.Koch & Jordon-Thaden | Brassicaceae | 8 |
| Tonestus lyallii | A.Nelson | Asteraceae | 8 |
| Tonestus pygmaeus | A.Nelson | Asteraceae | 8 |
| Torreyostellaria jamesiana | (Torr.) Gang Yao, B.Xue & Z.Q.Song | Caryophyllaceae | 8 |
| Townsendia annua | Beaman | Asteraceae | 8 |
| Townsendia condensata | Parry | Asteraceae | 8 |
| Townsendia exscapa | (Richardson) Porter | Asteraceae | 8 |
| Townsendia grandiflora | Nutt. | Asteraceae | 8 |
| Townsendia hookeri | Beaman | Asteraceae | 8 |
| Townsendia incana | Nutt. | Asteraceae | 8 |
| Townsendia parryi | Eaton | Asteraceae | 8 |
| Toxicodendron radicans | (L.) Kuntze | Anacardiaceae | 8 |
| Toxicoscordion paniculatum | (Nutt.) Rydb. | Melanthiaceae | 8 |
| Toxicoscordion venenosum | (S.Watson) Rydb. | Melanthiaceae | 8 |
| Tradescantia bracteata | Small | Commelinaceae | 8 |
| Tradescantia occidentalis | (Britton) Smyth | Commelinaceae | 8 |
| Trautvetteria caroliniensis | (Walter) Vail | Ranunculaceae | 8 |
| Triantha occidentalis | (S.Watson) R.R.Gates | Tofieldiaceae | 8 |
| Trichogalium boreale | (L.) Fourr. | Rubiaceae | 8 |
| Trifolium dasyphyllum | Torr. & A.Gray | Fabaceae | 8 |
| Trifolium gymnocarpon | Nutt. | Fabaceae | 8 |
| Trifolium longipes | Nutt. | Fabaceae | 8 |
| Trifolium nanum | Torr. | Fabaceae | 8 |
| Trifolium parryi | A.Gray | Fabaceae | 8 |
| Trifolium variegatum | Nutt. | Fabaceae | 8 |
| Trifolium wormskioldii | Lehm. | Fabaceae | 8 |
| Triglochin maritima | L. | Juncaginaceae | 8 |
| Triglochin palustris | L. | Juncaginaceae | 8 |
| Triodanis holzingeri | McVaugh | Campanulaceae | 8 |
| Triodanis leptocarpa | Nieuwl. | Campanulaceae | 8 |
| Triodanis perfoliata | (L.) Nieuwl. | Campanulaceae | 8 |
| Triteleia grandiflora | Lindl. | Asparagaceae | 8 |
| Trollius albiflorus | (A.Gray) Rydb. | Ranunculaceae | 8 |
| Turritis glabra | L. | Brassicaceae | 8 |
| Typha angustifolia | L. | Typhaceae | 8 |
| Typha domingensis | Pers. | Typhaceae | 8 |
| Typha latifolia | L. | Typhaceae | 8 |
| Ulmus americana | L. | Ulmaceae | 8 |
| Urtica gracilis | Aiton | Urticaceae | 8 |
| Utricularia intermedia | Hayne | Lentibulariaceae | 8 |
| Utricularia macrorhiza | Leconte | Lentibulariaceae | 8 |
| Utricularia minor | L. | Lentibulariaceae | 8 |
| Vaccinium cespitosum | Michx. | Ericaceae | 8 |
| Vaccinium scoparium | Leiberg ex Coville | Ericaceae | 8 |
| Vaccinium uliginosum | L. | Ericaceae | 8 |
| Vahlodea atropurpurea | (Wahlenb.) Fr. | Poaceae | 8 |
| Valeriana acutiloba | Rydb. | Caprifoliaceae | 8 |
| Valeriana dioica | L. | Caprifoliaceae | 8 |
| Valeriana edulis | Nutt. | Caprifoliaceae | 8 |
| Valeriana occidentalis | A.Heller | Caprifoliaceae | 8 |
| Veratrum californicum | Durand | Melanthiaceae | 8 |
| Verbena bipinnatifida | (Nutt.) Schauer | Verbenaceae | 8 |
| Verbena bracteata | Cav. ex Lag. & Rodr. | Verbenaceae | 8 |
| Verbena hastata | L. | Verbenaceae | 8 |
| Verbena macdougalii | A.Heller | Verbenaceae | 8 |
| Verbena stricta | Vent. | Verbenaceae | 8 |
| Veronica americana | (Raf.) Schwein. ex Benth. | Plantaginaceae | 8 |
| Veronica besseya | M.M.Mart.Ort. & Albach | Plantaginaceae | 8 |
| Veronica catenata | Pennell | Plantaginaceae | 8 |
| Veronica paysonii | (Pennell & L.O.Williams) M.M.Mart.Ort. & Albach | Plantaginaceae | 8 |
| Veronica peregrina | L. | Plantaginaceae | 8 |
| Veronica plantaginea | E.James | Plantaginaceae | 8 |
| Veronica scutellata | L. | Plantaginaceae | 8 |
| Veronica serpyllifolia | L. | Plantaginaceae | 8 |
| Veronica wormskjoldii | Roem. & Schult. | Plantaginaceae | 8 |
| Veronica wyomingensis | (A.Nelson) M.M.Mart.Ort. & Albach | Plantaginaceae | 8 |
| Vesper bulbosus | (A.Nelson) R.L.Hartm. & G.L.Nesom | Apiaceae | 8 |
| Vesper constancei | (R.L.Hartm.) R.L.Hartm. & G.L.Nesom | Apiaceae | 8 |
| Vesper montanus | (Torr. & A.Gray) R.L.Hartm. & G.L.Nesom | Apiaceae | 8 |
| Viburnum edule | (Michx.) Raf. | Viburnaceae | 8 |
| Viburnum lentago | L. | Viburnaceae | 8 |
| Viburnum opulus | L. | Viburnaceae | 8 |
| Vicia americana | Muhl. ex Willd. | Fabaceae | 8 |
| Vicia ludoviciana | Nutt. | Fabaceae | 8 |
| Viola adunca | Sm. | Violaceae | 8 |
| Viola canadensis | L. | Violaceae | 8 |
| Viola macloskeyi | F.E.Lloyd | Violaceae | 8 |
| Viola nephrophylla | Greene | Violaceae | 8 |
| Viola nuttallii | Pursh | Violaceae | 8 |
| Viola orbiculata | (A.Gray) Geyer ex B.D.Jacks. | Violaceae | 8 |
| Viola palustris | L. | Violaceae | 8 |
| Viola pedatifida | G.Don | Violaceae | 8 |
| Viola praemorsa | Douglas | Violaceae | 8 |
| Viola pubescens | Aiton | Violaceae | 8 |
| Viola purpurea | Kellogg | Violaceae | 8 |
| Viola renifolia | A.Gray | Violaceae | 8 |
| Viola vallicola | A.Nelson | Violaceae | 8 |
| Vitis riparia | Michx. | Vitaceae | 8 |
| Woodsia oregana | D.C.Eaton | Woodsiaceae | 8 |
| Woodsia scopulina | D.C.Eaton | Woodsiaceae | 8 |
| Wyethia amplexicaulis | (Nutt.) Nutt. | Asteraceae | 8 |
| Xanthisma grindelioides | (Nutt.) D.R.Morgan & R.L.Hartm. | Asteraceae | 8 |
| Xanthisma spinulosum | (Pursh) D.R.Morgan & R.L.Hartm. | Asteraceae | 8 |
| Xanthium orientale | L. | Asteraceae | 8 |
| Xerophyllum tenax | (Pursh) Nutt. | Melanthiaceae | 8 |
| Yucca glauca | Nutt. | Asparagaceae | 8 |
| Zannichellia palustris | L. | Potamogetonaceae | 8 |
| Zeltnera exaltata | (Griseb.) G.Mans. | Gentianaceae | 8 |
| Zizia aptera | (A.Gray) Fernald | Apiaceae | 8 |
| Antennaria flagellaris | A.Gray | Asteraceae | 7 |
| Bromus marginatus | Nees ex Steud. | Poaceae | 7 |
| Carex backii | Boott | Cyperaceae | 7 |
| Carex simulata | Mack. | Cyperaceae | 7 |
| Carex vernacula | L.H.Bailey | Cyperaceae | 7 |
| Corispermum americanum | (Nutt.) Nutt. | Chenopodiaceae | 7 |
| Crepis modocensis | Greene | Asteraceae | 7 |
| Crepis runcinata | (E.James) Torr. & A.Gray | Asteraceae | 7 |
| Cryptantha kelseyana | Greene | Boraginaceae | 7 |
| Erigeron pulcherrimus | A.Heller | Asteraceae | 7 |
| Festuca saximontana | Rydb. | Poaceae | 7 |
| Koenigia islandica | L. | Polygonaceae | 7 |
| Nothocalais nigrescens | (L.F.Hend.) A.Heller | Asteraceae | 7 |
| Penstemon mucronatus | N.H.Holmgren | Plantaginaceae | 7 |
| Phacelia tetramera | J.T.Howell | Hydrophyllaceae | 7 |
| Plantago eriopoda | Torr. | Plantaginaceae | 7 |
| Polypodium saximontanum | Windham | Polypodiaceae | 7 |
| Salix cascadensis | Cockerell | Salicaceae | 7 |
| Salix rotundifolia | Trautv. | Salicaceae | 7 |
| Scirpus pallidus | (Britton) Fernald | Cyperaceae | 7 |
| Senecio riddellii | Torr. & A.Gray | Asteraceae | 7 |
| Suaeda occidentalis | (S.Watson) S.Watson | Chenopodiaceae | 7 |
| Townsendia montana | M.E.Jones | Asteraceae | 7 |
| Trifolium haydenii | Porter | Fabaceae | 7 |
| Amaranthus arenicola | I.M.Johnst. | Amaranthaceae | 6 |
| Astragalus argophyllus | Nutt. | Fabaceae | 6 |
| Astragalus geyeri | A.Gray | Fabaceae | 6 |
| Bacopa rotundifolia | (Michx.) Wettst. | Plantaginaceae | 6 |
| Calystegia macounii | (Greene) Brummitt | Convolvulaceae | 6 |
| Carex cordillerana | Saarela & B.A.Ford | Cyperaceae | 6 |
| Carex oreocharis | Holm | Cyperaceae | 6 |
| Collomia tenella | A.Gray | Polemoniaceae | 6 |
| Danthonia parryi | Scribn. | Poaceae | 6 |
| Erigeron melanocephalus | A.Nelson | Asteraceae | 6 |
| Eritrichium howardii | (A.Gray) Rydb. | Boraginaceae | 6 |
| Festuca thurberi | Vasey | Poaceae | 6 |
| Gayophytum diffusum | Torr. & A.Gray | Onagraceae | 6 |
| Gnaphalium exilifolium | A.Nelson | Asteraceae | 6 |
| Isoetes occidentalis | L.F.Hend. | Isoetaceae | 6 |
| Juncus triglumis | L. | Juncaceae | 6 |
| Lathrocasis tenerrima | (A.Gray) L.A.Johnson | Polemoniaceae | 6 |
| Lupinus wyethii | S.Watson | Fabaceae | 6 |
| Lygodesmia grandiflora | (Nutt.) Torr. & A.Gray | Asteraceae | 6 |
| Melica spectabilis | Scribn. | Poaceae | 6 |
| Mentzelia speciosa | Osterh. | Loasaceae | 6 |
| Navarretia saximontana | S.C.Spencer | Polemoniaceae | 6 |
| Oxytropis nana | Nutt. | Fabaceae | 6 |
| Penstemon arenicola | A.Nelson | Plantaginaceae | 6 |
| Platanthera praeclara | Sheviak & M.L.Bowles | Orchidaceae | 6 |
| Polygonum ramosissimum | Michx. | Polygonaceae | 6 |
| Scolochloa festucacea | (Willd.) Link | Poaceae | 6 |
| Symphyotrichum porteri | (A.Gray) G.L.Nesom | Asteraceae | 6 |
| Thelypodiopsis elegans | (M.E.Jones) Rydb. | Brassicaceae | 6 |
| Viola utahensis | M.S.Baker & J.C.Clausen | Violaceae | 6 |
| Antennaria alpina | (L.) Gaertn. | Asteraceae | 5 |
| Astragalus grayi | Parry ex S.Watson | Fabaceae | 5 |
| Atriplex truncata | (Torr. ex S.Watson) A.Gray | Chenopodiaceae | 5 |
| Boechera microphylla | (Nutt.) Dorn | Brassicaceae | 5 |
| Braya glabella | Richardson | Brassicaceae | 5 |
| Carex jonesii | L.H.Bailey | Cyperaceae | 5 |
| Carex oederi | Retz. | Cyperaceae | 5 |
| Carex praeceptorum | Mack. | Cyperaceae | 5 |
| Castilleja gracillima | Rydb. | Orobanchaceae | 5 |
| Draba spectabilis | Greene | Brassicaceae | 5 |
| Drymocallis pseudorupestris | (Rydb.) Rydb. | Rosaceae | 5 |
| Eleocharis flavescens | (Poir.) Urb. | Cyperaceae | 5 |
| Eriogonum mancum | Rydb. | Polygonaceae | 5 |
| Gayophytum racemosum | Torr. & A.Gray | Onagraceae | 5 |
| Gentiana fremontii | Torr. | Gentianaceae | 5 |
| Juncus vaseyi | Engelm. | Juncaceae | 5 |
| Micromonolepis pusilla | (Torr. ex S.Watson) Ulbr. | Chenopodiaceae | 5 |
| Muhlenbergia andina | (Nutt.) Hitchc. | Poaceae | 5 |
| Penstemon saxosorum | Pennell | Plantaginaceae | 5 |
| Phacelia glandulosa | Nutt. | Hydrophyllaceae | 5 |
| Polygonum polygaloides | Meisn. | Polygonaceae | 5 |
| Rumex densiflorus | Osterh. | Polygonaceae | 5 |
| Salix lemmonii | Bebb | Salicaceae | 5 |
| Solidago pallida | (Porter) Rydb. | Asteraceae | 5 |
| Agrostis mertensii | Trin. | Poaceae | 4 |
| Arceuthobium cyanocarpum | (A.Nelson ex Rydb.) J.M.Coult. & A.Nelson | Santalaceae | 4 |
| Astragalus coltonii | M.E.Jones | Fabaceae | 4 |
| Bouteloua simplex | Lag. | Poaceae | 4 |
| Carex pelocarpa | F.J.Herm. | Cyperaceae | 4 |
| Carex torreyi | Tuck. | Cyperaceae | 4 |
| Chrysothamnus vaseyi | (A.Gray) Greene | Asteraceae | 4 |
| Draba incerta | Payson | Brassicaceae | 4 |
| Erigeron canus | A.Gray | Asteraceae | 4 |
| Erigeron eximius | Greene | Asteraceae | 4 |
| Erigeron grandiflorus | Hook. | Asteraceae | 4 |
| Eriogonum divaricatum | Hook. | Polygonaceae | 4 |
| Eriogonum fusiforme | Small | Polygonaceae | 4 |
| Lepidium ramosissimum | A.Nelson | Brassicaceae | 4 |
| Mertensia nevadensis | A.Nelson | Boraginaceae | 4 |
| Phlox caespitosa | Nutt. | Polemoniaceae | 4 |
| Plagiobothrys leptocladus | (Greene) I.M.Johnst. | Boraginaceae | 4 |
| Podagrostis humilis | (Vasey) Björkman | Poaceae | 4 |
| Polemonium brandegeei | (A.Gray) Greene | Polemoniaceae | 4 |
| Sisyrinchium pallidum | Cholewa & Douglass M.Hend. | Iridaceae | 4 |
| Solidago mollis | Bartl. | Asteraceae | 4 |
| Stellaria calycantha | (Ledeb.) Bong. | Caryophyllaceae | 4 |
| Symphyotrichum welshii | (Cronquist) G.L.Nesom | Asteraceae | 4 |
| Thelypodium paniculatum | A.Nelson | Brassicaceae | 4 |
| Xylorhiza glabriuscula | Nutt. | Asteraceae | 4 |
| Agrostis variabilis | Rydb. | Poaceae | 3 |
| Astragalus jejunus | S.Watson | Fabaceae | 3 |
| Carex nelsonii | Mack. | Cyperaceae | 3 |
| Carex parryana | Dewey | Cyperaceae | 3 |
| Carex scopulorum | Holm | Cyperaceae | 3 |
| Chenopodium desiccatum | A.Nelson | Chenopodiaceae | 3 |
| Cirsium inamoenum | (Greene) D.J.Keil | Asteraceae | 3 |
| Cryptantha torreyana | (A.Gray) Greene | Boraginaceae | 3 |
| Downingia laeta | (Greene) Greene | Campanulaceae | 3 |
| Draba crassifolia | Graham | Brassicaceae | 3 |
| Erigeron subtrinervis | Rydb. ex Porter & Britton | Asteraceae | 3 |
| Eriocoma robusta | (Vasey) Romasch. | Poaceae | 3 |
| Erysimum inconspicuum | (S.Watson) MacMill. | Brassicaceae | 3 |
| Festuca minutiflora | Rydb. | Poaceae | 3 |
| Festuca richardsonii | Hook. | Poaceae | 3 |
| Gentianella amarella | (L.) Börner | Gentianaceae | 3 |
| Marsilea oligospora | Goodd. | Marsileaceae | 3 |
| Packera subnuda | (DC.) Trock & T.M.Barkley | Asteraceae | 3 |
| Penstemon cyathophorus | Rydb. | Plantaginaceae | 3 |
| Phlox pungens | Dorn | Polemoniaceae | 3 |
| Pteridium latiusculum | Hieron. | Dennstaedtiaceae | 3 |
| Pyrrocoma lanceolata | (Hook.) Greene | Asteraceae | 3 |
| Pyrrocoma uniflora | (Hook.) Greene | Asteraceae | 3 |
| Salix prolixa | Andersson | Salicaceae | 3 |
| Suckleya suckleyana | (Torr.) Rydb. | Chenopodiaceae | 3 |
Abies concolorwhite fir
Abies lasiocarpaAlpine Fir
Abronia ammophilaWyoming Sand Verbena
Abronia ellipticafragrant white sand verbena
Abronia fragranssnowball sand verbena
Abronia melliferawhite sand verbena
Abronia micranthasmallflower sandverbena
Acer glabrumRocky Mountain maple
Acer negundobox elder
Acer saccharumsugar maple
Achillea millefoliumcommon yarrow
Aconitum columbianumColumbian Monkshood
Actaea rubrared baneberry
Adenocaulon bicolorAmerican trailplant
Adiantum aleuticumwestern maidenhair fern
Adoxa moschatellinaMoschatel
Agalinis tenuifoliaslenderleaf false foxglove
Agastache foeniculumblue giant hyssop
Agoseris aurantiacaorange agoseris
Agoseris glaucapale agoseris
Agrimonia gryposepalaCommon Agrimony
Agrimonia striataRoadside Agrimony
Agrostis scabrarough bentgrass
Alchemilla filicaulisthinstem lady's mantle
Aliciella leptomeriasand gilia
Aliciella pinnatifidasticky gilia
Alisma gramineumGeyer waterplantain
Alisma trivialenorthern water-plantain
Allium acuminatumtapertip onion
Allium brandegeeiBrandegee's onion
Allium brevistylumShort-styled Onion
Allium cernuumnodding onion
Allium geyeriGeyer's onion
Allium schoenoprasumSpanish garlic
Allium textileearly onion
Alnus alnobetulaEuropean Green Alder
Alnus incanagrey alder
Alopecurus aequalisOrange Foxtail
Alopecurus carolinianusCarolina foxtail
Alopecurus magellanicusAlpine Meadow-Foxtail
Ambrosia acanthicarpaannual bursage
Ambrosia artemisiifoliacommon ragweed
Ambrosia psilostachyawestern ragweed
Ambrosia trifidagiant ragweed
Amelanchier alnifoliaSaskatoon
Amelanchier utahensisUtah serviceberry
Ammannia robustagrand redstem
Amorpha canescensleadplant
