| Abies lasiocarpa | (Hook.) Nutt. | Pinaceae | 8 |
| Acer negundo | L. | Sapindaceae | 8 |
| Achillea alpina | L. | Asteraceae | 8 |
| Achillea millefolium | L. | Asteraceae | 8 |
| Acorus calamus | L. | Acoraceae | 8 |
| Actaea rubra | (Aiton) Willd. | Ranunculaceae | 8 |
| Adoxa moschatellina | L. | Viburnaceae | 8 |
| Agastache foeniculum | (Pursh) Kuntze | Lamiaceae | 8 |
| Ageratina altissima | (L.) R.M.King & H.Rob. | Asteraceae | 8 |
| Agoseris aurantiaca | (Hook.) Greene | Asteraceae | 8 |
| Agoseris glauca | (Pursh) Raf. | Asteraceae | 8 |
| Agrostis scabra | Willd. | Poaceae | 8 |
| Alisma triviale | Pursh | Alismataceae | 8 |
| Allium schoenoprasum | L. | Amaryllidaceae | 8 |
| Alnus alnobetula | (Ehrh.) K.Koch | Betulaceae | 8 |
| Alnus incana | (L.) Moench | Betulaceae | 8 |
| Alopecurus aequalis | Sobol. | Poaceae | 8 |
| Alopecurus magellanicus | Lam. | Poaceae | 8 |
| Ambrosia artemisiifolia | L. | Asteraceae | 8 |
| Amelanchier alnifolia | (Nutt.) Nutt. ex M.Roem. | Rosaceae | 8 |
| Anaphalis margaritacea | (L.) Benth. & Hook.f. | Asteraceae | 8 |
| Andromeda polifolia | L. | Ericaceae | 8 |
| Androsace lehmanniana | Spreng. | Primulaceae | 8 |
| Androsace septentrionalis | L. | Primulaceae | 8 |
| Anemonastrum canadense | (L.) Mosyakin | Ranunculaceae | 8 |
| Anemonastrum richardsonii | (Hook.) Mosyakin | Ranunculaceae | 8 |
| Anemonastrum sibiricum | (L.) Holub | Ranunculaceae | 8 |
| Anemone lithophila | Rydb. | Ranunculaceae | 8 |
| Anemone multifida | Poir. | Ranunculaceae | 8 |
| Anemone parviflora | Michx. | Ranunculaceae | 8 |
| Angelica lucida | L. | Apiaceae | 8 |
| Antennaria howellii | Greene | Asteraceae | 8 |
| Antennaria media | Greene | Asteraceae | 8 |
| Antennaria microphylla | Rydb. | Asteraceae | 8 |
| Antennaria monocephala | DC. | Asteraceae | 8 |
| Antennaria neglecta | Greene | Asteraceae | 8 |
| Antennaria pulcherrima | (Hook.) Greene | Asteraceae | 8 |
| Antennaria rosea | Greene | Asteraceae | 8 |
| Anthoxanthum monticola | (Bigelow) Veldkamp | Poaceae | 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 |
| Arabidopsis lyrata | (L.) O'Kane & Al-Shehbaz | Brassicaceae | 8 |
| Aralia nudicaulis | L. | Araliaceae | 8 |
| Arctagrostis latifolia | (R.Br.) Griseb. | Poaceae | 8 |
| Arctanthemum integrifolium | (Richardson) Tzvelev | Asteraceae | 8 |
| Arctostaphylos uva-ursi | (L.) Spreng. | Ericaceae | 8 |
| Arctous alpina | (L.) Nied. | Ericaceae | 8 |
| Arctous rubra | (Rehder & E.H.Wilson) Nakai | Ericaceae | 8 |
| Argentina anserina | (L.) Rydb. | Rosaceae | 8 |
| Armeria maritima | (Mill.) Willd. | Plumbaginaceae | 8 |
| Arnica angustifolia | Vahl | Asteraceae | 8 |
| Arnica chamissonis | Less. | Asteraceae | 8 |
| Arnica cordifolia | Hook. | Asteraceae | 8 |
| Arnica griscomii | Fernald | Asteraceae | 8 |
| Arnica lanceolata | Nutt. | Asteraceae | 8 |
| Arnica latifolia | Bong. | Asteraceae | 8 |
| Arnica lessingii | Greene | Asteraceae | 8 |
| Arnica lonchophylla | Greene | Asteraceae | 8 |
| Arnica mollis | Hook. | Asteraceae | 8 |
| Artemisia biennis | Willd. | Asteraceae | 8 |
| Artemisia campestris | L. | Asteraceae | 8 |
| Artemisia dracunculus | L. | Asteraceae | 8 |
| Artemisia frigida | Willd. | Asteraceae | 8 |
| Artemisia tilesii | Ledeb. | Asteraceae | 8 |
| Askellia elegans | (Hook.) W.A.Weber | Asteraceae | 8 |
| Askellia pygmaea | (Ledeb.) Sennikov | Asteraceae | 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 bodinii | E.Sheld. | Fabaceae | 8 |
| Astragalus canadensis | L. | Fabaceae | 8 |
| Astragalus eucosmus | B.L.Rob. | Fabaceae | 8 |
| Astragalus laxmannii | Jacq. | Fabaceae | 8 |
| Astragalus multiflorus | (Pursh) A.Gray | Fabaceae | 8 |
| Astragalus umbellatus | Bunge | Fabaceae | 8 |
| Barbarea orthoceras | Ledeb. | Brassicaceae | 8 |
| Bartsia alpina | L. | Orobanchaceae | 8 |
| Beckmannia syzigachne | (Steud.) Fernald | Poaceae | 8 |
| Betula glandulosa | Michx. | Betulaceae | 8 |
| Betula nana | L. | Betulaceae | 8 |
| Betula occidentalis | Hook. | Betulaceae | 8 |
| Betula papyrifera | Marshall | Betulaceae | 8 |
| Betula pendula | Roth | Betulaceae | 8 |
| Betula pumila | L. | Betulaceae | 8 |
| Bidens cernua | L. | Asteraceae | 8 |
| Blitum capitatum | L. | Chenopodiaceae | 8 |
| Blitum nuttallianum | Schult. | Chenopodiaceae | 8 |
| Boechera angustifolia | (Nutt.) Dorn | Brassicaceae | 8 |
| Boechera grahamii | (Lehm.) Windham & Al-Shehbaz | Brassicaceae | 8 |
| Boechera retrofracta | (Graham) Á.Löve & D.Löve | Brassicaceae | 8 |
| Bolboschoenus maritimus | (L.) Palla | Cyperaceae | 8 |
| Boschniakia rossica | (Cham. & Schltdl.) B.Fedtsch. | Orobanchaceae | 8 |
| Botrychium minganense | Vict. | Ophioglossaceae | 8 |
| Botrychium pinnatum | H.St.John | Ophioglossaceae | 8 |
| Botrychium simplex | E.Hitchc. | Ophioglossaceae | 8 |
| Botrychium spathulatum | W.H.Wagner | Ophioglossaceae | 8 |
| Botrypus virginianus | (L.) Michx. | Ophioglossaceae | 8 |
| Braya humilis | (C.A.Mey.) B.L.Rob. | Brassicaceae | 8 |
| Bromus ciliatus | L. | Poaceae | 8 |
| Bromus pumpellianus | Scribn. | Poaceae | 8 |
| Bupleurum americanum | J.M.Coult. & Rose | Apiaceae | 8 |
| Calamagrostis canadensis | (Michx.) P.Beauv. | Poaceae | 8 |
| Calamagrostis inexpansa | A.Gray | Poaceae | 8 |
| Calamagrostis lapponica | (Wahlenb.) Hartm. | Poaceae | 8 |
| Calamagrostis purpurascens | R.Br. | Poaceae | 8 |
| Calamagrostis purpurea | (Trin.) Trin. | Poaceae | 8 |
| Calamagrostis stricta | (Timm) Koeler | Poaceae | 8 |
| Calla palustris | L. | Araceae | 8 |
| Callitriche hermaphroditica | L. | Plantaginaceae | 8 |
| Callitriche palustris | L. | Plantaginaceae | 8 |
| Caltha palustris | L. | Ranunculaceae | 8 |
| Calypso bulbosa | (L.) Oakes | Orchidaceae | 8 |
| Campanula alaskana | (A.Gray) Wight ex J.P.Anderson & Hultén | Campanulaceae | 8 |
| Campanula aurita | Greene | Campanulaceae | 8 |
| Campanula lasiocarpa | Cham. | Campanulaceae | 8 |
| Campanula petiolata | A.DC. | Campanulaceae | 8 |
| Capnoides sempervirens | (L.) Borkh. | Papaveraceae | 8 |
| Cardamine bellidifolia | L. | Brassicaceae | 8 |
| Cardamine parviflora | L. | Brassicaceae | 8 |
| Cardamine pensylvanica | Muhl. ex Willd. | Brassicaceae | 8 |
| Cardamine polemonioides | Rouy | Brassicaceae | 8 |
| Carex alascana | Boeckeler | Cyperaceae | 8 |
| Carex aquatilis | Wahlenb. | Cyperaceae | 8 |
| Carex atherodes | Spreng. | Cyperaceae | 8 |
| Carex atratiformis | Britton | Cyperaceae | 8 |
| Carex atrosquama | Mack. | Cyperaceae | 8 |
| Carex aurea | Nutt. | Cyperaceae | 8 |
| Carex bebbii | (L.H.Bailey) Olney ex Fernald | Cyperaceae | 8 |
| Carex bigelowii | Torr. ex Schwein. | Cyperaceae | 8 |
| Carex brunnescens | (Pers.) Poir. | Cyperaceae | 8 |
| Carex buxbaumii | Wahlenb. | Cyperaceae | 8 |
| Carex canescens | L. | Cyperaceae | 8 |
| Carex capillaris | L. | Cyperaceae | 8 |
| Carex capitata | Sol. | Cyperaceae | 8 |
| Carex chordorrhiza | L.f. | Cyperaceae | 8 |
| Carex concinna | R.Br. | Cyperaceae | 8 |
| Carex crawfordii | Fernald | Cyperaceae | 8 |
| Carex deflexa | Hornem. | Cyperaceae | 8 |
| Carex deweyana | Schwein. | Cyperaceae | 8 |
| Carex diandra | Schrank | Cyperaceae | 8 |
| Carex disperma | Dewey | Cyperaceae | 8 |
| Carex duriuscula | C.A.Mey. | Cyperaceae | 8 |
| Carex eburnea | Boott | Cyperaceae | 8 |
| Carex echinata | Murray | Cyperaceae | 8 |
| Carex filifolia | Nutt. | Cyperaceae | 8 |
| Carex foenea | Willd. | Cyperaceae | 8 |
| Carex garberi | Fernald | Cyperaceae | 8 |
| Carex interior | L.H.Bailey | Cyperaceae | 8 |
| Carex lachenalii | Schkuhr | Cyperaceae | 8 |
| Carex lasiocarpa | Ehrh. | Cyperaceae | 8 |
| Carex lenticularis | Michx. | Cyperaceae | 8 |
| Carex leptalea | Wahlenb. | Cyperaceae | 8 |
| Carex limosa | L. | Cyperaceae | 8 |
| Carex livida | (Wahlenb.) Willd. | Cyperaceae | 8 |
| Carex macloviana | d'Urv. | Cyperaceae | 8 |
| Carex magellanica | Lam. | Cyperaceae | 8 |
| Carex media | R.Br. | Cyperaceae | 8 |
| Carex microglochin | Wahlenb. | Cyperaceae | 8 |
| Carex microptera | Mack. | Cyperaceae | 8 |
| Carex myosuroides | Vill. | Cyperaceae | 8 |
| Carex nardina | (Hornem.) Fr. | Cyperaceae | 8 |
| Carex petasata | Dewey | Cyperaceae | 8 |
| Carex prairea | Dewey ex Alph.Wood | Cyperaceae | 8 |
| Carex praticola | Rydb. | Cyperaceae | 8 |
| Carex rariflora | (Wahlenb.) Sm. | Cyperaceae | 8 |
| Carex richardsonii | R.Br. | Cyperaceae | 8 |
| Carex rossii | Boott | Cyperaceae | 8 |
| Carex rostrata | Stokes | Cyperaceae | 8 |
| Carex rotundata | Wahlenb. | Cyperaceae | 8 |
| Carex rupestris | All. | Cyperaceae | 8 |
| Carex sartwellii | Dewey | Cyperaceae | 8 |
| Carex saxatilis | L. | Cyperaceae | 8 |
| Carex scirpoidea | Michx. | Cyperaceae | 8 |
| Carex siccata | Dewey | Cyperaceae | 8 |
| Carex simpliciuscula | Wahlenb. | Cyperaceae | 8 |
| Carex supina | Willd. ex Wahlenb. | Cyperaceae | 8 |
| Carex sychnocephala | J.Carey | Cyperaceae | 8 |
| Carex tenuiflora | Wahlenb. | Cyperaceae | 8 |
| Carex trisperma | Dewey | Cyperaceae | 8 |
| Carex utriculata | Boott | Cyperaceae | 8 |
| Carex vaginata | Tausch | Cyperaceae | 8 |
| Cassiope tetragona | (L.) D.Don | Ericaceae | 8 |
| Castilleja elegans | Malte | Orobanchaceae | 8 |
| Castilleja hyperborea | Pennell | Orobanchaceae | 8 |
| Castilleja pallida | (L.) Kunth | Orobanchaceae | 8 |
| Castilleja raupii | Pennell | Orobanchaceae | 8 |
| Castilleja septentrionalis | Lindl. | Orobanchaceae | 8 |
| Cerastium alpinum | L. | Caryophyllaceae | 8 |
| Cerastium arcticum | Lange | Caryophyllaceae | 8 |
| Cerastium beeringianum | Cham. & Schltdl. | Caryophyllaceae | 8 |
| Cerastium nutans | Raf. | Caryophyllaceae | 8 |
| Cerastium regelii | Ostenf. | Caryophyllaceae | 8 |
| Ceratophyllum demersum | L. | Ceratophyllaceae | 8 |
| Chamaedaphne calyculata | (L.) Moench | Ericaceae | 8 |
| Chamaerhodos erecta | (L.) Bunge | Rosaceae | 8 |
| Chenopodium berlandieri | Moq. | Chenopodiaceae | 8 |
| Chenopodium rubrum | L. | Chenopodiaceae | 8 |
| Cherleria arctica | (Steven ex Ser.) A.J.Moore & Dillenb. | Caryophyllaceae | 8 |
| Cherleria biflora | (L.) A. J. Moore & Dillenb. | Caryophyllaceae | 8 |
| Cherleria obtusiloba | (Rydb.) A.J.Moore & Dillenb. | Caryophyllaceae | 8 |
| Chimaphila umbellata | (L.) W.P.C.Barton | Ericaceae | 8 |
| Chrysosplenium tetrandrum | (N.Lund) Th.Fr. | Saxifragaceae | 8 |
| Cicuta bulbifera | L. | Apiaceae | 8 |
| Cicuta douglasii | J.M.Coult. & Rose | Apiaceae | 8 |
| Cicuta maculata | L. | Apiaceae | 8 |
| Cicuta virosa | L. | Apiaceae | 8 |
| Cinna latifolia | (Trevir. ex Göpp.) Griseb. | Poaceae | 8 |
| Circaea alpina | L. | Onagraceae | 8 |
| Cirsium drummondii | Torr. & A.Gray | Asteraceae | 8 |
| Cirsium foliosum | DC. | Asteraceae | 8 |
| Claytonia megarhiza | (A.Gray) Parry ex S.Watson | Montiaceae | 8 |
| Cochlearia groenlandica | L. | Brassicaceae | 8 |
| Collomia linearis | Nutt. | Polemoniaceae | 8 |
| Comandra umbellata | (L.) Nutt. | Santalaceae | 8 |
| Comarum palustre | L. | Rosaceae | 8 |
| Comastoma tenellum | (Rottb.) Toyok. | Gentianaceae | 8 |
| Coptis trifolia | (L.) Salisb. | Ranunculaceae | 8 |
| Corallorhiza trifida | Châtel. | Orchidaceae | 8 |
| Cornus canadensis | L. | Cornaceae | 8 |
| Cornus sericea | L. | Cornaceae | 8 |
| Cornus suecica | L. | Cornaceae | 8 |
| Corydalis aurea | Willd. | Papaveraceae | 8 |
| Corydalis pauciflora | (Stephan) Pers. | Papaveraceae | 8 |
| Crassula aquatica | (L.) Schönland | Crassulaceae | 8 |
| Cryptogramma acrostichoides | R.Br. | Pteridaceae | 8 |
| Cryptogramma sitchensis | (Rupr.) T.Moore | Pteridaceae | 8 |
| Cryptogramma stelleri | (S.G.Gmel.) Prantl | Pteridaceae | 8 |
| Cypripedium acaule | Aiton | Orchidaceae | 8 |
| Cypripedium guttatum | Sw. | Orchidaceae | 8 |
| Cypripedium parviflorum | Salisb. | Orchidaceae | 8 |
| Cypripedium passerinum | Richardson | Orchidaceae | 8 |
| Cystopteris fragilis | (L.) Bernh. | Cystopteridaceae | 8 |
| Cystopteris montana | (Lam.) Bernh. ex Desv. | Cystopteridaceae | 8 |
| Dactylorhiza viridis | (L.) R.M.Bateman, Pridgeon & M.W.Chase | Orchidaceae | 8 |
| Danthonia spicata | (L.) Roem. & Schult. | Poaceae | 8 |
| Dasiphora fruticosa | (L.) Rydb. | Rosaceae | 8 |
| Delphinium glaucum | S.Watson | Ranunculaceae | 8 |
| Dendrolycopodium dendroideum | (Michx.) A.Haines | Lycopodiaceae | 8 |
| Descurainia incana | (Bernh. ex Fisch. & C.A.Mey.) Dorn | Brassicaceae | 8 |
| Descurainia pinnata | (Walter) Britton | Brassicaceae | 8 |
| Descurainia sophioides | (Fisch.) O.E.Schulz | Brassicaceae | 8 |
| Diapensia obovata | (F.Schmidt) Nakai | Diapensiaceae | 8 |
| Diervilla lonicera | Mill. | Caprifoliaceae | 8 |
| Diphasiastrum alpinum | (L.) Holub | Lycopodiaceae | 8 |
| Diphasiastrum complanatum | (L.) Holub | Lycopodiaceae | 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 glabella | Pursh | Brassicaceae | 8 |
| Draba lonchocarpa | Rydb. | Brassicaceae | 8 |
| Draba nemorosa | L. | Brassicaceae | 8 |
| Draba ogilviensis | Hultén | Brassicaceae | 8 |
| Draba oligosperma | Hook. | Brassicaceae | 8 |
| Draba praealta | Greene | Brassicaceae | 8 |
| Drosera anglica | Huds. | Droseraceae | 8 |
| Drosera linearis | Goldie | Droseraceae | 8 |
| Drosera rotundifolia | L. | Droseraceae | 8 |
| Dryas ajanensis | Juz. | Rosaceae | 8 |
| Dryas drummondii | Richardson ex Hook. | Rosaceae | 8 |
| Dryas hookeriana | Juz. | Rosaceae | 8 |
| Dryas integrifolia | Vahl | Rosaceae | 8 |
| Drymocallis arguta | (Pursh) Rydb. | Rosaceae | 8 |
| Dryopteris carthusiana | (Vill.) H.P.Fuchs | Dryopteridaceae | 8 |
| Dryopteris expansa | (C.Presl) Fraser-Jenk. & Jermy | Dryopteridaceae | 8 |
| Dryopteris fragrans | (L.) Schott | Dryopteridaceae | 8 |
| Elaeagnus commutata | Bernh. ex Rydb. | Elaeagnaceae | 8 |
| Elatine americana | (Pursh) Arn. | Elatinaceae | 8 |
| Eleocharis acicularis | (L.) Roem. & Schult. | Cyperaceae | 8 |
| Eleocharis elliptica | Kunth | Cyperaceae | 8 |
| Eleocharis erythropoda | Steud. | Cyperaceae | 8 |
| Eleocharis palustris | (L.) Roem. & Schult. | Cyperaceae | 8 |
| Eleocharis quinqueflora | (Hartmann) O.Schwarz | Cyperaceae | 8 |
| Eleocharis uniglumis | (Link) Schult. | Cyperaceae | 8 |
| Elymus canadensis | L. | Poaceae | 8 |
| Elymus glaucus | Buckley | Poaceae | 8 |
| Elymus lanceolatus | (Scribn. & J.G.Sm.) Gould | Poaceae | 8 |
| Elymus sibiricus | L. | Poaceae | 8 |
| Elymus violaceus | (Hornem.) J.Feilberg | Poaceae | 8 |
| Empetrum nigrum | L. | Ericaceae | 8 |
| Epilobium anagallidifolium | Lam. | Onagraceae | 8 |
| Epilobium angustifolium | L. | 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 |
| Equisetum arvense | L. | Equisetaceae | 8 |
| Equisetum fluviatile | L. | Equisetaceae | 8 |
| Equisetum hyemale | L. | Equisetaceae | 8 |
| Equisetum palustre | L. | Equisetaceae | 8 |
| Equisetum pratense | Ehrh. | Equisetaceae | 8 |
| Equisetum scirpoides | Michx. | Equisetaceae | 8 |
| Equisetum sylvaticum | L. | Equisetaceae | 8 |
| Equisetum variegatum | Schleich. ex F.Weber & D.Mohr | Equisetaceae | 8 |
| Eremogone capillaris | (Poir.) Fenzl | Caryophyllaceae | 8 |
| Erigeron acris | L. | Asteraceae | 8 |
| Erigeron compositus | Pursh | Asteraceae | 8 |
| Erigeron glabellus | Nutt. | Asteraceae | 8 |
| Erigeron humilis | Graham | Asteraceae | 8 |
| Erigeron hyssopifolius | Michx. | Asteraceae | 8 |
| Erigeron lonchophyllus | Hook. | Asteraceae | 8 |
| Erigeron nivalis | Nutt. | Asteraceae | 8 |
| Erigeron philadelphicus | L. | Asteraceae | 8 |
| Eriophorum angustifolium | Honck. | Cyperaceae | 8 |
| Eriophorum brachyantherum | Trautv. & C.A.Mey. | Cyperaceae | 8 |
| Eriophorum chamissonis | C.A.Mey. | Cyperaceae | 8 |
| Eriophorum gracile | Roth | Cyperaceae | 8 |
| Eriophorum scheuchzeri | Hoppe | Cyperaceae | 8 |
| Eriophorum vaginatum | L. | Cyperaceae | 8 |
| Eriophorum viridicarinatum | (Engelm.) Fernald | Cyperaceae | 8 |
| Erysimum coarctatum | Fernald | Brassicaceae | 8 |
| Erysimum pallasii | (Pursh) Fernald | Brassicaceae | 8 |
| Erythranthe guttata | (DC.) G.L.Nesom | Phrymaceae | 8 |
| Euphrasia subarctica | Raup | Orobanchaceae | 8 |
| Eurybia sibirica | (L.) G.L.Nesom | Asteraceae | 8 |
| Euthamia graminifolia | (L.) Nutt. | Asteraceae | 8 |
| Eutrema salsugineum | (Pall.) Al-Shehbaz & Warwick | Brassicaceae | 8 |
| Festuca brachyphylla | Schult. & Schult.f. | Poaceae | 8 |
| Festuca rubra | L. | Poaceae | 8 |
| Fragaria vesca | L. | Rosaceae | 8 |
| Fragaria virginiana | Mill. | Rosaceae | 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 |
| Gentiana affinis | Griseb. | Gentianaceae | 8 |
| Gentiana glauca | Pall. | Gentianaceae | 8 |
| Gentiana prostrata | Haenke | Gentianaceae | 8 |
| Gentianella propinqua | (Richardson) J.M.Gillett | Gentianaceae | 8 |
| Gentianopsis virgata | (Raf.) Holub | Gentianaceae | 8 |
| Geocaulon lividum | (Richardson) Fernald | Santalaceae | 8 |
| Geranium bicknellii | Britton | Geraniaceae | 8 |
| Geranium richardsonii | Fisch. & Trautv. | Geraniaceae | 8 |
| Geum aleppicum | Jacq. | Rosaceae | 8 |
| Geum glaciale | Adams ex Fisch. | Rosaceae | 8 |
| Geum macrophyllum | Willd. | Rosaceae | 8 |
| Geum rossii | (R.Br.) Ser. | Rosaceae | 8 |
| Geum triflorum | Pursh | Rosaceae | 8 |
| Glyceria borealis | (Nash) Batch. | Poaceae | 8 |
| Glyceria grandis | S.Watson | Poaceae | 8 |
| Glyceria striata | (Lam.) Hitchc. | Poaceae | 8 |
| Goodyera repens | (L.) R.Br. | Orchidaceae | 8 |
| Grindelia hirsutula | Hook. & Arn. | Asteraceae | 8 |
| Gymnocarpium continentale | (Petrov.) Pojark. | Cystopteridaceae | 8 |
| Gymnocarpium dryopteris | (L.) Newman | Cystopteridaceae | 8 |
| Hackelia deflexa | (Wahlenb.) Opiz | Boraginaceae | 8 |
| Halenia deflexa | (Sm.) Griseb. | Gentianaceae | 8 |
| Halerpestes cymbalaria | Greene | Ranunculaceae | 8 |
| Hammarbya paludosa | (L.) Kuntze | Orchidaceae | 8 |
| Harrimanella hypnoides | (L.) Coville | Ericaceae | 8 |
| Hedysarum alpinum | L. | Fabaceae | 8 |
| Hedysarum boreale | Nutt. | Fabaceae | 8 |
| Helenium autumnale | L. | Asteraceae | 8 |
| Helictochloa hookeri | (Scribn.) Romero Zarco | Poaceae | 8 |
| Heracleum maximum | W.Bartram | Apiaceae | 8 |
| Hesperostipa curtiseta | (Hitchc.) Barkworth | Poaceae | 8 |
| Heuchera richardsonii | R.Br. | Saxifragaceae | 8 |
| Hieracium albiflorum | Hook. | Asteraceae | 8 |
| Hieracium triste | Willd. ex Spreng. | Asteraceae | 8 |
| Hieracium umbellatum | L. | Asteraceae | 8 |
| Hippuris vulgaris | L. | Plantaginaceae | 8 |
| Honckenya peploides | (L.) Ehrh. | Caryophyllaceae | 8 |
| Hordeum jubatum | L. | Poaceae | 8 |
| Hudsonia tomentosa | Nutt. | Cistaceae | 8 |
| Huperzia continentalis | Testo, A.Haines & A.V.Gilman | Lycopodiaceae | 8 |
| Huperzia selago | (L.) Bernh. ex Schrank & Mart. | Lycopodiaceae | 8 |
| Hydrogalium labradoricum | (Wiegand) Kadereit & Schneew. | Rubiaceae | 8 |
| Impatiens noli-tangere | L. | Balsaminaceae | 8 |
| Isoetes echinospora | Durieu | Isoetaceae | 8 |
| Juncus alpinoarticulatus | Chaix | Juncaceae | 8 |
| Juncus arcticus | Willd. | Juncaceae | 8 |
| Juncus balticus | Willd. | Juncaceae | 8 |
| Juncus bufonius | L. | Juncaceae | 8 |
| Juncus castaneus | Sm. | Juncaceae | 8 |
| Juncus drummondii | E.Mey. | Juncaceae | 8 |
| Juncus filiformis | L. | Juncaceae | 8 |
| Juncus nodosus | L. | Juncaceae | 8 |
| Juncus stygius | L. | Juncaceae | 8 |
| Juniperus communis | L. | Cupressaceae | 8 |
| Juniperus horizontalis | Moench | Cupressaceae | 8 |
| Kalmia microphylla | (Hook.) A.Heller | Ericaceae | 8 |
| Kalmia polifolia | Wangenh. | Ericaceae | 8 |
| Kalmia procumbens | (L.) Gift, Kron & P.F.Stevens ex Galasso, Banfi & F.Conti | Ericaceae | 8 |
| Koeleria macrantha | (Ledeb.) Schult. | Poaceae | 8 |
| Koeleria spicata | (L.) Barberá, Quintanar, Soreng & P.M.Peterson | Poaceae | 8 |
| Lactuca oblongifolia | Nutt. | Asteraceae | 8 |
| Lagotis glauca | Gaertn. | Plantaginaceae | 8 |
| Lappula occidentalis | (S.Watson) Greene | Boraginaceae | 8 |
| Larix laricina | (Du Roi) K.Koch | Pinaceae | 8 |
| Lathyrus japonicus | Willd. | Fabaceae | 8 |
| Lathyrus ochroleucus | Hook. | Fabaceae | 8 |
| Lepidium densiflorum | Schrad. | Brassicaceae | 8 |
| Leptarrhena pyrolifolia | (D.Don) Ser. | Saxifragaceae | 8 |
| Leymus innovatus | (Beal) Pilg. | Poaceae | 8 |
| Leymus mollis | (Trin.) Pilg. | Poaceae | 8 |
| Limosella aquatica | L. | Plantaginaceae | 8 |
| Linnaea borealis | L. | Caprifoliaceae | 8 |
| Linum lewisii | Pursh | Linaceae | 8 |
| Liparis loeselii | (L.) Rich. | Orchidaceae | 8 |
| Lobelia kalmii | L. | Campanulaceae | 8 |
| Lomatogonium rotatum | (L.) Fernald | Gentianaceae | 8 |
| Lonicera dioica | L. | Caprifoliaceae | 8 |
| Luetkea pectinata | (Pursh) Kuntze | Rosaceae | 8 |
| Lupinus arcticus | S.Watson | Fabaceae | 8 |
| Luzula multiflora | (Ehrh.) Lej. | Juncaceae | 8 |
| Luzula parviflora | (Ehrh.) Desv. | Juncaceae | 8 |
| Luzula rufescens | Fisch. ex E.Mey. | Juncaceae | 8 |
| Luzula spicata | (L.) DC. | Juncaceae | 8 |
| Lycopodium lagopus | Zinserl. ex Kuzen. | Lycopodiaceae | 8 |
| Lycopus uniflorus | Michx. | Lamiaceae | 8 |
| Lysimachia europaea | (L.) U.Manns & Anderb. | Primulaceae | 8 |
| Lysimachia maritima | (L.) Galasso, Banfi & Soldano | Primulaceae | 8 |
| Lysimachia thyrsiflora | L. | Primulaceae | 8 |
| Maianthemum canadense | Desf. | Asparagaceae | 8 |
| Maianthemum racemosum | (L.) Link | Asparagaceae | 8 |
| Maianthemum stellatum | (L.) Link | Asparagaceae | 8 |
| Maianthemum trifolium | (L.) Sloboda | Asparagaceae | 8 |
| Malaxis monophyllos | (L.) Sw. | Orchidaceae | 8 |
| Matricaria discoidea | DC. | Asteraceae | 8 |
| Mentha canadensis | L. | Lamiaceae | 8 |
| Menyanthes trifoliata | L. | Menyanthaceae | 8 |
| Mertensia maritima | (L.) Gray | Boraginaceae | 8 |
| Micranthes ferruginea | (Graham) Brouillet & Gornall | Saxifragaceae | 8 |
| Micranthes foliolosa | (R.Br.) Gornall | Saxifragaceae | 8 |
| Micranthes hieraciifolia | (Waldst. & Kit. ex Willd.) Haw. | Saxifragaceae | 8 |
| Micranthes lyallii | (Engl.) Small | Saxifragaceae | 8 |
| Micranthes nelsoniana | (D.Don) Small | Saxifragaceae | 8 |
| Micranthes nivalis | (L.) Small | Saxifragaceae | 8 |
| Micranthes reflexa | (Hook.) Small | Saxifragaceae | 8 |
| Mitella nuda | L. | Saxifragaceae | 8 |
| Moehringia macrophylla | (Hook.) Fenzl | Caryophyllaceae | 8 |
| Moneses uniflora | (L.) A.Gray | Ericaceae | 8 |
| Monotropa uniflora | L. | Ericaceae | 8 |
| Montia fontana | L. | Montiaceae | 8 |
| Muhlenbergia glomerata | (Willd.) Trin. | Poaceae | 8 |
| Muhlenbergia richardsonis | (Trin.) Rydb. | Poaceae | 8 |
| Myosotis asiatica | (Vestergr.) Schischk. & Serg. | Boraginaceae | 8 |
| Myrica gale | L. | Myricaceae | 8 |
| Myriophyllum alterniflorum | DC. | Haloragaceae | 8 |
| Myriophyllum sibiricum | Kom. | Haloragaceae | 8 |
| Myriophyllum verticillatum | L. | Haloragaceae | 8 |
| Nassella viridula | (Trin.) Barkworth | Poaceae | 8 |
| Neottia borealis | (Morong) Szlach. | Orchidaceae | 8 |
| Nuphar polysepala | Engelm. | Nymphaeaceae | 8 |
| Nuphar variegata | Engelm. ex Durand | Nymphaeaceae | 8 |
| Nymphaea tetragona | Georgi | Nymphaeaceae | 8 |
| Odontarrhena obovata | C.A.Mey. | Brassicaceae | 8 |
| Oenothera villosa | Thunb. | Onagraceae | 8 |
| Oreomecon lapponica | (Tolm.) Galasso, Banfi & Bartolucci | Papaveraceae | 8 |
| Orthilia secunda | (L.) House | Ericaceae | 8 |
| Oryzopsis asperifolia | Michx. | Poaceae | 8 |
| Osmorhiza depauperata | Phil. | Apiaceae | 8 |
| Oxytropis borealis | DC. | Fabaceae | 8 |
| Oxytropis campestris | (L.) DC. | Fabaceae | 8 |
| Oxytropis deflexa | (Pall.) DC. | Fabaceae | 8 |
| Oxytropis maydelliana | Trautv. | Fabaceae | 8 |
| Oxytropis nigrescens | (Pall.) Fisch. ex DC. | Fabaceae | 8 |
| Oxytropis splendens | Douglas | Fabaceae | 8 |
| Packera cymbalaria | (Pursh) 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 streptanthifolia | (Greene) W.A.Weber & Á.Löve | Asteraceae | 8 |
| Parnassia fimbriata | K.D.Koenig | Celastraceae | 8 |
| Parnassia kotzebuei | Cham. ex Spreng. | Celastraceae | 8 |
| Parnassia palustris | L. | Celastraceae | 8 |
| Parrya nudicaulis | (L.) Regel | Brassicaceae | 8 |
| Pedicularis capitata | Adams | Orobanchaceae | 8 |
| Pedicularis flammea | L. | Orobanchaceae | 8 |
| Pedicularis hirsuta | L. | Orobanchaceae | 8 |
| Pedicularis labradorica | Wirsing | Orobanchaceae | 8 |
| Pedicularis lanata | Cham. & Schltdl. | Orobanchaceae | 8 |
| Pedicularis langsdorffii | Fisch. ex Steven | Orobanchaceae | 8 |
| Pedicularis lapponica | L. | Orobanchaceae | 8 |
| Pedicularis oederi | Vahl | Orobanchaceae | 8 |
| Pedicularis sudetica | Willd. | Orobanchaceae | 8 |
| Pedicularis verticillata | L. | Orobanchaceae | 8 |
| Pellaea glabella | Mett. | Pteridaceae | 8 |
| Penstemon gormanii | Greene | Plantaginaceae | 8 |
| Persicaria amphibia | (L.) Delarbre | Polygonaceae | 8 |
| Persicaria bistorta | (L.) Samp. | Polygonaceae | 8 |
| Persicaria lapathifolia | (L.) Delarbre | Polygonaceae | 8 |
| Persicaria vivipara | (L.) Ronse Decr. | Polygonaceae | 8 |
| Petasites frigidus | (L.) Fr. | Asteraceae | 8 |
| Phacelia franklinii | (R.Br.) A.Gray | Hydrophyllaceae | 8 |
| Phalaris arundinacea | L. | Poaceae | 8 |
| Phegopteris connectilis | (Michx.) Watt | Thelypteridaceae | 8 |
| Phippsia algida | (Sol.) R.Br. | Poaceae | 8 |
| Phleum alpinum | L. | Poaceae | 8 |
| Phragmites australis | (Cav.) Steud. | Poaceae | 8 |
| Phyllodoce caerulea | (L.) Bab. | Ericaceae | 8 |
| Phyllodoce empetriformis | (Sm.) D.Don | Ericaceae | 8 |
| Phyllodoce glanduliflora | (Hook.) Coville | Ericaceae | 8 |
| Physostegia virginiana | (L.) Benth. | Lamiaceae | 8 |
| Picea glauca | (Moench) Voss | Pinaceae | 8 |
| Picea mariana | Britton, Sterns & Poggenb. | Pinaceae | 8 |
| Pinguicula villosa | L. | Lentibulariaceae | 8 |
| Pinguicula vulgaris | L. | Lentibulariaceae | 8 |
| Pinus banksiana | Lamb. | Pinaceae | 8 |
| Pinus contorta | Douglas ex Loudon | Pinaceae | 8 |
| Piptatheropsis pungens | (Torr. ex Spreng.) Romasch., P.M.Peterson & Soreng | Poaceae | 8 |
| Plantago canescens | Adams | Plantaginaceae | 8 |
| Plantago maritima | L. | 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 |
| Poa alpina | L. | Poaceae | 8 |
| Poa arctica | R.Br. | 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 |
| Polemonium boreale | Adams | Polemoniaceae | 8 |
| Polemonium pulcherrimum | Hook. | Polemoniaceae | 8 |
| Polemonium villosum | Rudolph ex Georgi | Polemoniaceae | 8 |
| Polygonum achoreum | S.F.Blake | Polygonaceae | 8 |
| Polygonum aviculare | L. | Polygonaceae | 8 |
| Polypodium sibiricum | Sipliv. | Polypodiaceae | 8 |
| Polypodium virginianum | L. | Polypodiaceae | 8 |
| Polystichum lonchitis | (L.) Roth | Dryopteridaceae | 8 |
| Populus balsamifera | L. | Salicaceae | 8 |
| Populus tremuloides | Michx. | Salicaceae | 8 |
| Potamogeton alpinus | Balb. | Potamogetonaceae | 8 |
| Potamogeton berchtoldii | Fieber | 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 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 zosteriformis | Fernald | Potamogetonaceae | 8 |
| Potentilla arenosa | (Turcz.) Juz. | Rosaceae | 8 |
| Potentilla biflora | D.F.K.Schltdl. | Rosaceae | 8 |
| Potentilla bimundorum | Soják | Rosaceae | 8 |
| Potentilla glaucophylla | Lehm. | 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 pensylvanica | L. | Rosaceae | 8 |
| Potentilla subvahliana | Jurtzev | Rosaceae | 8 |
| Potentilla supina | L. | Rosaceae | 8 |
| Primula egaliksensis | Wormsk. | Primulaceae | 8 |
| Primula frigida | (Cham. & Schltdl.) A.R.Mast & Reveal | Primulaceae | 8 |
| Primula incana | M.E.Jones | Primulaceae | 8 |
| Primula mistassinica | Michx. | Primulaceae | 8 |
| Primula pauciflora | (Greene) A.R.Mast & Reveal | Primulaceae | 8 |
| Prunus pensylvanica | L.f. | Rosaceae | 8 |
| Prunus virginiana | L. | Rosaceae | 8 |
| Puccinellia nuttalliana | (Schult.) Hitchc. | Poaceae | 8 |
| Pulsatilla nuttalliana | (DC.) Spreng. | Ranunculaceae | 8 |
| Pyrola asarifolia | Michx. | Ericaceae | 8 |
| Pyrola chlorantha | Sw. | Ericaceae | 8 |
| Pyrola grandiflora | Radius | Ericaceae | 8 |
| Pyrola minor | L. | Ericaceae | 8 |
| Ranunculus abortivus | L. | Ranunculaceae | 8 |
| Ranunculus eschscholtzii | Schltdl. | Ranunculaceae | 8 |
| Ranunculus flammula | L. | Ranunculaceae | 8 |
| Ranunculus gmelinii | DC. | Ranunculaceae | 8 |
| Ranunculus hyperboreus | Rottb. | Ranunculaceae | 8 |
| Ranunculus lapponicus | L. | Ranunculaceae | 8 |
| Ranunculus macounii | Britton | Ranunculaceae | 8 |
| Ranunculus nivalis | L. | Ranunculaceae | 8 |
| Ranunculus pensylvanicus | L.f. | Ranunculaceae | 8 |
| Ranunculus pygmaeus | Wahlenb. | Ranunculaceae | 8 |
| Ranunculus reptans | L. | Ranunculaceae | 8 |
| Ranunculus rhomboideus | Goldie | Ranunculaceae | 8 |
| Ranunculus sceleratus | L. | Ranunculaceae | 8 |
| Ranunculus sulphureus | Sol. | Ranunculaceae | 8 |
| Ranunculus trichophyllus | Chaix | Ranunculaceae | 8 |
| Ranunculus turneri | Greene | Ranunculaceae | 8 |
| Rhinanthus groenlandicus | Chabert | Orobanchaceae | 8 |
| Rhododendron groenlandicum | (Oeder) Kron & Judd | Ericaceae | 8 |
| Rhododendron lapponicum | (L.) Wahlenb. | Ericaceae | 8 |
| Rhododendron tomentosum | Harmaja | Ericaceae | 8 |
| Rhynchospora alba | (L.) Vahl | Cyperaceae | 8 |
| Ribes glandulosum | Weber | Grossulariaceae | 8 |
| Ribes hudsonianum | Richardson | Grossulariaceae | 8 |
| Ribes lacustre | (Pers.) Poir. | Grossulariaceae | 8 |
| Ribes oxyacanthoides | L. | Grossulariaceae | 8 |
| Ribes triste | Pall. | Grossulariaceae | 8 |
| Rorippa palustris | (L.) Besser | Brassicaceae | 8 |
| Rosa acicularis | Lindl. | Rosaceae | 8 |
| Rosa blanda | Aiton | Rosaceae | 8 |
| Rosa nutkana | C.Presl | Rosaceae | 8 |
| Rosa woodsii | Lindl. | Rosaceae | 8 |
| Rubus arcticus | L. | Rosaceae | 8 |
| Rubus chamaemorus | L. | Rosaceae | 8 |
| Rubus idaeus | L. | Rosaceae | 8 |
| Rubus pubescens | Raf. | Rosaceae | 8 |
| Rumex alpestris | Jacq. | Polygonaceae | 8 |
| Rumex aquaticus | L. | Polygonaceae | 8 |
| Rumex britannica | L. | Polygonaceae | 8 |
| Rumex maritimus | L. | Polygonaceae | 8 |
| Rumex occidentalis | S.Watson | Polygonaceae | 8 |
| Rumex triangulivalvis | (Danser) Rech.f. | Polygonaceae | 8 |
| Ruppia cirrhosa | (Petagna) Grande | Ruppiaceae | 8 |
| Sabulina dawsonensis | (Britton) Rydb. | Caryophyllaceae | 8 |
| Sabulina rubella | (Wahlenb.) Dillenb. & Kadereit | Caryophyllaceae | 8 |
| Sagina nodosa | (L.) Fenzl | Caryophyllaceae | 8 |
| Sagina saginoides | (L.) H.Karst. | Caryophyllaceae | 8 |
| Sagittaria cuneata | E.Sheld. | Alismataceae | 8 |
| Salix alaxensis | (Andersson) Coville | Salicaceae | 8 |
| Salix arctica | Pall. | Salicaceae | 8 |
| Salix arctophila | Cockerell ex A.Heller | Salicaceae | 8 |
| Salix barclayi | Andersson | Salicaceae | 8 |
| Salix barrattiana | Hook. | Salicaceae | 8 |
| Salix bebbiana | Sarg. | Salicaceae | 8 |
| Salix brachycarpa | Nutt. | Salicaceae | 8 |
| Salix candida | Flüggé ex Willd. | Salicaceae | 8 |
| Salix commutata | Bebb | Salicaceae | 8 |
| Salix discolor | Muhl. | Salicaceae | 8 |
| Salix drummondiana | Barratt | Salicaceae | 8 |
| Salix glauca | L. | Salicaceae | 8 |
| Salix hastata | L. | Salicaceae | 8 |
| Salix herbacea | L. | Salicaceae | 8 |
| Salix interior | Rowlee | Salicaceae | 8 |
| Salix lasiandra | Benth. | Salicaceae | 8 |
| Salix myrtillifolia | Andersson | Salicaceae | 8 |
| Salix petiolaris | Sm. | Salicaceae | 8 |
| Salix planifolia | Pursh | Salicaceae | 8 |
| Salix polaris | Wahlenb. | Salicaceae | 8 |
| Salix pseudomonticola | C.R.Ball | Salicaceae | 8 |
| Salix pulchra | Cham. | Salicaceae | 8 |
| Salix pyrifolia | Andersson | Salicaceae | 8 |
| Salix reticulata | L. | Salicaceae | 8 |
| Salix scouleriana | Barratt | Salicaceae | 8 |
| Salix serissima | (L.H.Bailey ex Arthur) Fernald | Salicaceae | 8 |
| Sanguisorba officinalis | L. | Rosaceae | 8 |
| Sarracenia purpurea | L. | Sarraceniaceae | 8 |
| Saussurea angustifolia | (L.) DC. | Asteraceae | 8 |
| Saxifraga adscendens | L. | Saxifragaceae | 8 |
| Saxifraga aizoides | L. | Saxifragaceae | 8 |
| Saxifraga bronchialis | L. | Saxifragaceae | 8 |
| Saxifraga cernua | L. | Saxifragaceae | 8 |
| Saxifraga cespitosa | L. | Saxifragaceae | 8 |
| Saxifraga flagellaris | Willd. ex Sternb. | Saxifragaceae | 8 |
| Saxifraga hirculus | L. | Saxifragaceae | 8 |
| Saxifraga hyperborea | R.Br. | Saxifragaceae | 8 |
| Saxifraga oppositifolia | L. | Saxifragaceae | 8 |
| Saxifraga paniculata | Mill. | Saxifragaceae | 8 |
| Saxifraga serpyllifolia | Pursh | Saxifragaceae | 8 |
| Saxifraga sibirica | L. | Saxifragaceae | 8 |
| Saxifraga tricuspidata | Rottb. | Saxifragaceae | 8 |
| Sceptridium multifidum | (S.G.Gmel.) M.Nishida | Ophioglossaceae | 8 |
| Scheuchzeria palustris | L. | Scheuchzeriaceae | 8 |
| Schizachne purpurascens | (Torr.) Swallen | Poaceae | 8 |
| Schoenoplectus acutus | (Muhl. ex Bigelow) Á.Löve & D.Löve | Cyperaceae | 8 |
| Schoenoplectus tabernaemontani | (C.C.Gmel.) Palla | Cyperaceae | 8 |
| Scirpus microcarpus | J.Presl & C.Presl | Cyperaceae | 8 |
| Scutellaria galericulata | L. | Lamiaceae | 8 |
| Selaginella sibirica | (Milde) Hieron. | Selaginellaceae | 8 |
| Selaginella spinulosa | A.Braun ex Döll | Selaginellaceae | 8 |
| Senecio eremophilus | Richardson | Asteraceae | 8 |
| Senecio lugens | Richardson | Asteraceae | 8 |
| Senecio triangularis | Hook. | Asteraceae | 8 |
| Shepherdia canadensis | (L.) Nutt. | Elaeagnaceae | 8 |
| Sibbaldia procumbens | L. | Rosaceae | 8 |
| Sibbaldia tridentata | (Aiton) Paule & Soják | Rosaceae | 8 |
| Silene acaulis | (L.) Jacq. | Caryophyllaceae | 8 |
| Silene involucrata | (Cham. & Schltdl.) Bocquet | Caryophyllaceae | 8 |
| Silene menziesii | Hook. | Caryophyllaceae | 8 |
| Silene repens | Patrin | Caryophyllaceae | 8 |
| Silene uralensis | (Rupr.) Bocquet | Caryophyllaceae | 8 |
| Sisyrinchium montanum | Greene | Iridaceae | 8 |
| Sium suave | Walter | Apiaceae | 8 |
| Solidago lepida | DC. | Asteraceae | 8 |
| Solidago multiradiata | Aiton | Asteraceae | 8 |
| Solidago simplex | Kunth | Asteraceae | 8 |
| Sorbus scopulina | Greene | Rosaceae | 8 |
| Sparganium angustifolium | Michx. | Typhaceae | 8 |
| Sparganium eurycarpum | Engelm. | Typhaceae | 8 |
| Sparganium natans | L. | Typhaceae | 8 |
| Spergularia marina | (L.) Besser | Caryophyllaceae | 8 |
| Sphenopholis intermedia | (Rydb.) Rydb. | Poaceae | 8 |
| Spinulum annotinum | (L.) A.Haines | Lycopodiaceae | 8 |
| Spiraea stevenii | (C.K.Schneid.) Rydb. | Rosaceae | 8 |
| Spiranthes romanzoffiana | Cham. | Orchidaceae | 8 |
| Sporobolus hookerianus | P.M.Peterson & Saarela | Poaceae | 8 |
| Sporobolus michauxianus | (Hitchc.) P.M.Peterson & Saarela | Poaceae | 8 |
| Stachys pilosa | Nutt. | Lamiaceae | 8 |
| Stellaria borealis | Bigelow | Caryophyllaceae | 8 |
| Stellaria humifusa | Rottb. | Caryophyllaceae | 8 |
| Stellaria longifolia | Muhl. ex Willd. | Caryophyllaceae | 8 |
| Stellaria longipes | Goldie | Caryophyllaceae | 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 |
| Subularia aquatica | L. | Brassicaceae | 8 |
| Symphoricarpos albus | (L.) S.F.Blake | Caprifoliaceae | 8 |
| Symphoricarpos occidentalis | (R.Br.) Hook. | Caprifoliaceae | 8 |
| Symphyotrichum boreale | (Torr. & A.Gray) Á.Löve & D.Löve | Asteraceae | 8 |
| Symphyotrichum ciliatum | (Ledeb.) G.L.Nesom | Asteraceae | 8 |
| Symphyotrichum ericoides | (L.) G.L.Nesom | Asteraceae | 8 |
| Symphyotrichum falcatum | (Lindl.) G.L.Nesom | Asteraceae | 8 |
| Symphyotrichum lanceolatum | (Willd.) G.L.Nesom | Asteraceae | 8 |
| Tephroseris frigida | (Richardson) Holub | Asteraceae | 8 |
| Tephroseris palustris | Fourr. | Asteraceae | 8 |
| Thacla natans | (Pall.) Deyl & Soják | Ranunculaceae | 8 |
| Thalictrum alpinum | L. | Ranunculaceae | 8 |
| Thalictrum sparsiflorum | Turcz. ex Fisch. & C.A.Mey. | Ranunculaceae | 8 |
| Thalictrum venulosum | Trel. | Ranunculaceae | 8 |
| Tofieldia coccinea | Richardson | Tofieldiaceae | 8 |
| Tofieldia pusilla | (Michx.) Pers. | Tofieldiaceae | 8 |
| Triantha glutinosa | (Michx.) Baker | Tofieldiaceae | 8 |
| Trichophorum alpinum | (L.) Pers. | Cyperaceae | 8 |
| Trichophorum cespitosum | (L.) Hartm. | Cyperaceae | 8 |
| Triglochin maritima | L. | Juncaginaceae | 8 |
| Triglochin palustris | L. | Juncaginaceae | 8 |
| Tripleurospermum hookeri | Sch.Bip. | Asteraceae | 8 |
| Turritis glabra | L. | Brassicaceae | 8 |
| Typha latifolia | L. | Typhaceae | 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 microcarpum | (Turcz. ex Rupr.) Schmalh. | Ericaceae | 8 |
| Vaccinium myrtilloides | Michx. | Ericaceae | 8 |
| Vaccinium oxycoccos | L. | Ericaceae | 8 |
| Vaccinium uliginosum | L. | Ericaceae | 8 |
| Vaccinium vitis-idaea | L. | Ericaceae | 8 |
| Vahlodea atropurpurea | (Wahlenb.) Fr. | Poaceae | 8 |
| Valeriana capitata | Link | Caprifoliaceae | 8 |
| Valeriana dioica | L. | Caprifoliaceae | 8 |
| Valeriana sitchensis | Bong. | Caprifoliaceae | 8 |
| Veratrum viride | Aiton | Melanthiaceae | 8 |
| Veronica alaskensis | M.M.Mart.Ort. & Albach | Plantaginaceae | 8 |
| Veronica americana | (Raf.) Schwein. ex Benth. | Plantaginaceae | 8 |
| Veronica peregrina | L. | Plantaginaceae | 8 |
| Veronica scutellata | L. | Plantaginaceae | 8 |
| Veronica wormskjoldii | Roem. & Schult. | Plantaginaceae | 8 |
| Viburnum edule | (Michx.) Raf. | Viburnaceae | 8 |
| Vicia americana | Muhl. ex Willd. | Fabaceae | 8 |
| Viola adunca | Sm. | Violaceae | 8 |
| Viola canadensis | L. | Violaceae | 8 |
| Viola labradorica | Schrank | Violaceae | 8 |
| Viola macloskeyi | F.E.Lloyd | Violaceae | 8 |
| Viola nephrophylla | Greene | Violaceae | 8 |
| Viola palustris | L. | Violaceae | 8 |
| Viola renifolia | A.Gray | Violaceae | 8 |
| Wilhelmsia physodes | (Fisch. ex Ser.) McNeill | Caryophyllaceae | 8 |
| Woodsia alpina | (Bolton) Gray | Woodsiaceae | 8 |
| Woodsia glabella | R.Br. | Woodsiaceae | 8 |
| Woodsia ilvensis | (L.) R.Br. | Woodsiaceae | 8 |
| Arctanthemum arcticum | (L.) Tzvelev | Asteraceae | 7 |
| Cerastium maximum | L. | Caryophyllaceae | 7 |
| Festuca saximontana | Rydb. | Poaceae | 7 |
| Isoetes lacustris | L. | Isoetaceae | 7 |
| Koenigia islandica | L. | Polygonaceae | 7 |
| Luzula kjellmaniana | Miyabe & Kudô | Juncaceae | 7 |
| Oxytropis arctica | R.Br. | Fabaceae | 7 |
| Plantago eriopoda | Torr. | Plantaginaceae | 7 |
| Sabulina elegans | (Cham. & Schltdl.) Dillenb. & Kadereit | Caryophyllaceae | 7 |
| Salix rotundifolia | Trautv. | Salicaceae | 7 |
| Cnidium cnidiifolium | (Turcz.) Schischk. | Apiaceae | 6 |
| Draba borealis | DC. | Brassicaceae | 6 |
| Juncus triglumis | L. | Juncaceae | 6 |
| Polygonum ramosissimum | Michx. | Polygonaceae | 6 |
| Pseudocherleria macrocarpa | (Pursh) Dillenb. & Kadereit | Caryophyllaceae | 6 |
| Scolochloa festucacea | (Willd.) Link | Poaceae | 6 |
| Trichophorum pumilum | (Vahl) Schinz & Thell. | Cyperaceae | 6 |
| Antennaria alpina | (L.) Gaertn. | Asteraceae | 5 |
| Blysmus rufus | (Huds.) Link | Cyperaceae | 5 |
| Braya glabella | Richardson | Brassicaceae | 5 |
| Cardamine umbellata | Greene | Brassicaceae | 5 |
| Carex adelostoma | V.I.Krecz. | Cyperaceae | 5 |
| Carex loliacea | L. | Cyperaceae | 5 |
| Carex oederi | Retz. | Cyperaceae | 5 |
| Carex podocarpa | R.Br. | Cyperaceae | 5 |
| Chrysosplenium iowense | Rydb. | Saxifragaceae | 5 |
| Draba palanderiana | Kjellm. | Brassicaceae | 5 |
| Erigeron eriocephalus | J.Vahl | Asteraceae | 5 |
| Eritrichium aretioides | (Cham.) DC. | Boraginaceae | 5 |
| Hippuris lanceolata | Retz. | Plantaginaceae | 5 |
| Juncus vaseyi | Engelm. | Juncaceae | 5 |
| Luzula wahlenbergii | Rupr. | Juncaceae | 5 |
| Oreomecon mcconnellii | (Hultén) Krivenko | Papaveraceae | 5 |
| Puccinellia phryganodes | (Trin.) Scribn. & Merr. | Poaceae | 5 |
| Sparganium hyperboreum | Laest. ex Beurl. | Typhaceae | 5 |
| Agrostis mertensii | Trin. | Poaceae | 4 |
| Cardamine digitata | Richardson | Brassicaceae | 4 |
| Draba nivalis | Lilj. | Brassicaceae | 4 |
| Eutrema edwardsii | R.Br. | Brassicaceae | 4 |
| Glyceria pulchella | (Nash) K.Schum. | Poaceae | 4 |
| Lepidium ramosissimum | A.Nelson | Brassicaceae | 4 |
| Oxytropis scammaniana | Hultén | Fabaceae | 4 |
| Pedicularis parviflora | Sm. | Orobanchaceae | 4 |
| Physostegia ledinghamii | (B.Boivin) P.D.Cantino | Lamiaceae | 4 |
| Podistera macounii | (J.M.Coult. & Rose) Mathias & Constance | Apiaceae | 4 |
| Salix arbusculoides | Andersson | Salicaceae | 4 |
| Stellaria calycantha | (Ledeb.) Bong. | Caryophyllaceae | 4 |
| Symphyotrichum nahanniense | (Cody) Semple | Asteraceae | 4 |
| Antennaria friesiana | (Trautv.) Ekman | Asteraceae | 3 |
| Artemisia furcata | M.Bieb. | Asteraceae | 3 |
| Carex eleusinoides | Turcz. ex Kunth | Cyperaceae | 3 |
| Carex membranacea | Hook. | Cyperaceae | 3 |
| Carex subspathacea | Wormsk. ex Hornem. | Cyperaceae | 3 |
| Chenopodium desiccatum | A.Nelson | Chenopodiaceae | 3 |
| Draba crassifolia | Graham | Brassicaceae | 3 |
| Draba lactea | Adams | Brassicaceae | 3 |
| Festuca richardsonii | Hook. | Poaceae | 3 |
| Gentianella amarella | (L.) Börner | Gentianaceae | 3 |
| Hippuris tetraphylla | L.f. | Plantaginaceae | 3 |
| Micranthes tenuis | (Wahlenb.) Small | Saxifragaceae | 3 |
| Poa alpigena | Lindm. | Poaceae | 3 |
| Pyrrocoma uniflora | (Hook.) Greene | Asteraceae | 3 |
| Salix prolixa | Andersson | Salicaceae | 3 |
| Salix tyrrellii | Raup | Salicaceae | 3 |