| Abies balsamea | (L.) Mill. | Pinaceae | 8 |
| Acer rubrum | L. | Sapindaceae | 8 |
| Acer spicatum | Lam. | Sapindaceae | 8 |
| Acorus calamus | L. | Acoraceae | 8 |
| Actaea rubra | (Aiton) Willd. | Ranunculaceae | 8 |
| Adiantum aleuticum | (Rupr.) C.A.Paris | Pteridaceae | 8 |
| Agrimonia striata | Michx. | Rosaceae | 8 |
| Agrostis perennans | (Walter) Tuck. | Poaceae | 8 |
| Agrostis scabra | Willd. | Poaceae | 8 |
| Alchemilla alpina | L. | Rosaceae | 8 |
| Alchemilla filicaulis | Buser | Rosaceae | 8 |
| Alisma triviale | Pursh | Alismataceae | 8 |
| Alnus alnobetula | (Ehrh.) K.Koch | Betulaceae | 8 |
| Alnus incana | (L.) Moench | Betulaceae | 8 |
| Alopecurus aequalis | Sobol. | Poaceae | 8 |
| Amauropelta noveboracensis | (L.) S.E.Fawc. & A.R.Sm. | Thelypteridaceae | 8 |
| Amelanchier bartramiana | (Tausch) M.Roem. | Rosaceae | 8 |
| Amelanchier laevis | Wiegand | Rosaceae | 8 |
| Amelanchier stolonifera | Wiegand | Rosaceae | 8 |
| Amphicarpaea bracteata | (L.) Fernald | Fabaceae | 8 |
| Anaphalis margaritacea | (L.) Benth. & Hook.f. | Asteraceae | 8 |
| Andersonglossum boreale | (Fernald) Jim.Mejías, J.I.Cohen & Naczi | Boraginaceae | 8 |
| Andromeda polifolia | L. | Ericaceae | 8 |
| Anemonastrum canadense | (L.) Mosyakin | Ranunculaceae | 8 |
| Anemone multifida | Poir. | Ranunculaceae | 8 |
| Anemone parviflora | Michx. | Ranunculaceae | 8 |
| Anemone virginiana | L. | Ranunculaceae | 8 |
| Angelica atropurpurea | L. | Apiaceae | 8 |
| Angelica lucida | L. | Apiaceae | 8 |
| Antennaria howellii | 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 |
| Apocynum androsaemifolium | L. | Apocynaceae | 8 |
| Apocynum cannabinum | L. | Apocynaceae | 8 |
| Arabis alpina | L. | Brassicaceae | 8 |
| Aralia hispida | Vent. | Araliaceae | 8 |
| Aralia nudicaulis | L. | Araliaceae | 8 |
| Arctagrostis latifolia | (R.Br.) Griseb. | Poaceae | 8 |
| Arctopoa eminens | (J.Presl) Prob. | Poaceae | 8 |
| Arctostaphylos uva-ursi | (L.) Spreng. | Ericaceae | 8 |
| Arctous alpina | (L.) Nied. | Ericaceae | 8 |
| Arctous rubra | (Rehder & E.H.Wilson) Nakai | Ericaceae | 8 |
| Arethusa bulbosa | L. | Orchidaceae | 8 |
| Argentina anserina | (L.) Rydb. | Rosaceae | 8 |
| Argentina pacifica | (Howell) Rydb. | Rosaceae | 8 |
| Armeria maritima | (Mill.) Willd. | Plumbaginaceae | 8 |
| Arnica angustifolia | Vahl | Asteraceae | 8 |
| Arnica griscomii | Fernald | Asteraceae | 8 |
| Arnica lonchophylla | Greene | Asteraceae | 8 |
| Aronia melanocarpa | (Michx.) Elliott | Rosaceae | 8 |
| Artemisia campestris | L. | Asteraceae | 8 |
| Askellia pygmaea | (Ledeb.) Sennikov | Asteraceae | 8 |
| Asplenium trichomanes | L. | Aspleniaceae | 8 |
| Asplenium viride | Huds. | Aspleniaceae | 8 |
| Astragalus alpinus | L. | Fabaceae | 8 |
| Astragalus bodinii | E.Sheld. | Fabaceae | 8 |
| Astragalus eucosmus | B.L.Rob. | Fabaceae | 8 |
| Astragalus robbinsii | (Oakes) A.Gray | Fabaceae | 8 |
| Athyrium americanum | (Butters) Maxon | Athyriaceae | 8 |
| Athyrium angustum | (Willd.) C.Presl | Athyriaceae | 8 |
| Atriplex nudicaulis | Boguslaw | Chenopodiaceae | 8 |
| Atriplex patula | L. | Chenopodiaceae | 8 |
| Avenella flexuosa | (L.) Drejer | Poaceae | 8 |
| Barbarea orthoceras | Ledeb. | Brassicaceae | 8 |
| Bartonia paniculata | (Michx.) Muhl. | Gentianaceae | 8 |
| Bartsia alpina | L. | Orobanchaceae | 8 |
| Betula alleghaniensis | Britton | Betulaceae | 8 |
| Betula cordifolia | Regel | Betulaceae | 8 |
| Betula glandulosa | Michx. | Betulaceae | 8 |
| Betula michauxii | Spach | Betulaceae | 8 |
| Betula papyrifera | Marshall | Betulaceae | 8 |
| Betula pubescens | Ehrh. | Betulaceae | 8 |
| Betula pumila | L. | Betulaceae | 8 |
| Bidens connata | Muhl. ex Willd. | Asteraceae | 8 |
| Bidens frondosa | L. | Asteraceae | 8 |
| Boechera angustifolia | (Nutt.) Dorn | Brassicaceae | 8 |
| Bolboschoenus maritimus | (L.) Palla | Cyperaceae | 8 |
| Botrychium angustisegmentum | (Pease & A.H.Moore) Fernald | Ophioglossaceae | 8 |
| Botrychium ascendens | W.H.Wagner | Ophioglossaceae | 8 |
| Botrychium lanceolatum | (Gmel.) Ångstr. | Ophioglossaceae | 8 |
| Botrychium matricariifolium | (Retz.) A.Braun ex W.D.J.Koch | Ophioglossaceae | 8 |
| Botrychium minganense | Vict. | Ophioglossaceae | 8 |
| Botrychium simplex | E.Hitchc. | Ophioglossaceae | 8 |
| Botrypus virginianus | (L.) Michx. | Ophioglossaceae | 8 |
| Brachyelytrum aristosum | (Michx.) Trel., Branner & Coville | Poaceae | 8 |
| Brachyelytrum erectum | (Schreb.) P.Beauv. | Poaceae | 8 |
| Brasenia schreberi | J.F.Gmel. | Cabombaceae | 8 |
| Braya humilis | (C.A.Mey.) B.L.Rob. | Brassicaceae | 8 |
| Bromus ciliatus | L. | Poaceae | 8 |
| Bromus pumpellianus | Scribn. | Poaceae | 8 |
| Cakile edentula | (Bigelow) Hook. | Brassicaceae | 8 |
| Calamagrostis breviligulata | (Fernald) Saarela | Poaceae | 8 |
| Calamagrostis canadensis | (Michx.) P.Beauv. | Poaceae | 8 |
| Calamagrostis inexpansa | A.Gray | 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 heterophylla | Pursh | Plantaginaceae | 8 |
| Callitriche palustris | L. | Plantaginaceae | 8 |
| Calopogon tuberosus | (L.) Britton, Sterns & Poggenb. | Orchidaceae | 8 |
| Caltha palustris | L. | Ranunculaceae | 8 |
| Calypso bulbosa | (L.) Oakes | Orchidaceae | 8 |
| Calystegia sepium | (L.) R.Br. | Convolvulaceae | 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 |
| Cardamine pratensis | L. | Brassicaceae | 8 |
| Carex adusta | Boott | Cyperaceae | 8 |
| Carex alascana | Boeckeler | Cyperaceae | 8 |
| Carex aquatilis | Wahlenb. | Cyperaceae | 8 |
| Carex arctata | Boott | Cyperaceae | 8 |
| Carex atratiformis | Britton | 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 billingsii | (O.W.Knight) Kirschb. | 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 castanea | Wahlenb. | Cyperaceae | 8 |
| Carex chordorrhiza | L.f. | Cyperaceae | 8 |
| Carex communis | L.H.Bailey | Cyperaceae | 8 |
| Carex concinna | R.Br. | Cyperaceae | 8 |
| Carex crawei | Dewey ex Torr. | Cyperaceae | 8 |
| Carex crawfordii | Fernald | Cyperaceae | 8 |
| Carex cryptolepis | Mack. | Cyperaceae | 8 |
| Carex cumulata | (L.H.Bailey) Mack. | Cyperaceae | 8 |
| Carex debilis | Michx. | Cyperaceae | 8 |
| Carex deflexa | Hornem. | Cyperaceae | 8 |
| Carex deweyana | Schwein. | Cyperaceae | 8 |
| Carex diandra | Schrank | Cyperaceae | 8 |
| Carex disperma | Dewey | Cyperaceae | 8 |
| Carex eburnea | Boott | Cyperaceae | 8 |
| Carex echinata | Murray | Cyperaceae | 8 |
| Carex exilis | Dewey | Cyperaceae | 8 |
| Carex flava | L. | Cyperaceae | 8 |
| Carex foenea | Willd. | Cyperaceae | 8 |
| Carex folliculata | L. | Cyperaceae | 8 |
| Carex gracillima | Schwein. | Cyperaceae | 8 |
| Carex gynandra | Schwein. | Cyperaceae | 8 |
| Carex hormathodes | Fernald | Cyperaceae | 8 |
| Carex hostiana | DC. | Cyperaceae | 8 |
| Carex houghtoniana | Torr. ex Dewey | Cyperaceae | 8 |
| Carex hystericina | Muhl. ex Willd. | Cyperaceae | 8 |
| Carex interior | L.H.Bailey | Cyperaceae | 8 |
| Carex intumescens | Rudge | Cyperaceae | 8 |
| Carex lachenalii | Schkuhr | Cyperaceae | 8 |
| Carex lacustris | Willd. | Cyperaceae | 8 |
| Carex lasiocarpa | Ehrh. | Cyperaceae | 8 |
| Carex lenticularis | Michx. | Cyperaceae | 8 |
| Carex lepidocarpa | Tausch | Cyperaceae | 8 |
| Carex leptalea | Wahlenb. | Cyperaceae | 8 |
| Carex leptonervia | (Fernald) Fernald | Cyperaceae | 8 |
| Carex limosa | L. | Cyperaceae | 8 |
| Carex livida | (Wahlenb.) Willd. | Cyperaceae | 8 |
| Carex lurida | Wahlenb. | Cyperaceae | 8 |
| Carex magellanica | Lam. | Cyperaceae | 8 |
| Carex michauxiana | Boeckeler | Cyperaceae | 8 |
| Carex microglochin | Wahlenb. | Cyperaceae | 8 |
| Carex nigra | (L.) Reichard | Cyperaceae | 8 |
| Carex novae-angliae | Schwein. | Cyperaceae | 8 |
| Carex oligosperma | Michx. | Cyperaceae | 8 |
| Carex paleacea | Schreb. ex Wahlenb. | Cyperaceae | 8 |
| Carex pallescens | L. | Cyperaceae | 8 |
| Carex pauciflora | Lightf. | Cyperaceae | 8 |
| Carex pedunculata | Muhl. ex Willd. | Cyperaceae | 8 |
| Carex pellita | Muhl. ex Willd. | Cyperaceae | 8 |
| Carex praticola | Rydb. | Cyperaceae | 8 |
| Carex projecta | Mack. | Cyperaceae | 8 |
| Carex pseudocyperus | L. | Cyperaceae | 8 |
| Carex radiata | (Wahlenb.) Small | Cyperaceae | 8 |
| Carex rariflora | (Wahlenb.) Sm. | Cyperaceae | 8 |
| Carex retrorsa | Schwein. | Cyperaceae | 8 |
| Carex rostrata | Stokes | Cyperaceae | 8 |
| Carex rupestris | All. | Cyperaceae | 8 |
| Carex saxatilis | L. | Cyperaceae | 8 |
| Carex scirpoidea | Michx. | Cyperaceae | 8 |
| Carex scoparia | Schkuhr ex Willd. | Cyperaceae | 8 |
| Carex silicea | Olney | Cyperaceae | 8 |
| Carex simpliciuscula | Wahlenb. | Cyperaceae | 8 |
| Carex sterilis | Willd. | Cyperaceae | 8 |
| Carex stipata | Muhl. ex Willd. | Cyperaceae | 8 |
| Carex tenuiflora | Wahlenb. | Cyperaceae | 8 |
| Carex tonsa | (Fernald) E.P.Bicknell | Cyperaceae | 8 |
| Carex trisperma | Dewey | Cyperaceae | 8 |
| Carex umbellata | Willd. | Cyperaceae | 8 |
| Carex utriculata | Boott | Cyperaceae | 8 |
| Carex vacillans | Drejer | Cyperaceae | 8 |
| Carex vaginata | Tausch | Cyperaceae | 8 |
| Carex vesicaria | L. | Cyperaceae | 8 |
| Carex vulpinoidea | Michx. | Cyperaceae | 8 |
| Castilleja septentrionalis | Lindl. | Orobanchaceae | 8 |
| Catabrosa aquatica | (L.) P.Beauv. | Poaceae | 8 |
| Cerastium alpinum | L. | Caryophyllaceae | 8 |
| Cerastium beeringianum | Cham. & Schltdl. | Caryophyllaceae | 8 |
| Chamaedaphne calyculata | (L.) Moench | Ericaceae | 8 |
| Chelone glabra | L. | Plantaginaceae | 8 |
| Cherleria biflora | (L.) A. J. Moore & Dillenb. | Caryophyllaceae | 8 |
| Chimaphila umbellata | (L.) W.P.C.Barton | Ericaceae | 8 |
| Cicuta bulbifera | L. | Apiaceae | 8 |
| Cicuta maculata | L. | Apiaceae | 8 |
| Cinna latifolia | (Trevir. ex Göpp.) Griseb. | Poaceae | 8 |
| Circaea alpina | L. | Onagraceae | 8 |
| Cirsium muticum | Michx. | Asteraceae | 8 |
| Cladium mariscoides | (Muhl.) Torr. | Cyperaceae | 8 |
| Claytonia caroliniana | Michx. | Montiaceae | 8 |
| Claytosmunda claytoniana | (L.) Metzgar & Rouhan | Osmundaceae | 8 |
| Clintonia borealis | (Aiton) Raf. | Liliaceae | 8 |
| Cochlearia groenlandica | L. | Brassicaceae | 8 |
| Comandra umbellata | (L.) Nutt. | Santalaceae | 8 |
| Comarum palustre | L. | Rosaceae | 8 |
| Conioselinum chinense | (L.) Britton, Sterns & Poggenb. | Apiaceae | 8 |
| Coptis trifolia | (L.) Salisb. | Ranunculaceae | 8 |
| Corallorhiza maculata | Raf. | Orchidaceae | 8 |
| Corallorhiza striata | Lindl. | Orchidaceae | 8 |
| Corallorhiza trifida | Châtel. | Orchidaceae | 8 |
| Cornus alternifolia | L.f. | Cornaceae | 8 |
| Cornus canadensis | L. | Cornaceae | 8 |
| Cornus sericea | L. | Cornaceae | 8 |
| Cornus suecica | L. | Cornaceae | 8 |
| Corylus cornuta | Marshall | Betulaceae | 8 |
| Crassula aquatica | (L.) Schönland | Crassulaceae | 8 |
| Crataegus chrysocarpa | Ashe | Rosaceae | 8 |
| Crataegus irrasa | Sarg. | Rosaceae | 8 |
| Crataegus macrosperma | Ashe | Rosaceae | 8 |
| Cryptogramma stelleri | (S.G.Gmel.) Prantl | Pteridaceae | 8 |
| Cuscuta gronovii | Willd. | Convolvulaceae | 8 |
| Cypripedium acaule | Aiton | Orchidaceae | 8 |
| Cypripedium parviflorum | Salisb. | Orchidaceae | 8 |
| Cypripedium reginae | Walter | Orchidaceae | 8 |
| Cystopteris bulbifera | (L.) Bernh. | Cystopteridaceae | 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 intermedia | Vasey | Poaceae | 8 |
| Danthonia spicata | (L.) Roem. & Schult. | Poaceae | 8 |
| Dasiphora fruticosa | (L.) Rydb. | Rosaceae | 8 |
| Dendrolycopodium dendroideum | (Michx.) A.Haines | Lycopodiaceae | 8 |
| Dendrolycopodium hickeyi | (W.H.Wagner, Beitel & R.C.Moran) A.Haines | Lycopodiaceae | 8 |
| Desmodium perplexum | B.G.Schub. | Fabaceae | 8 |
| Diapensia lapponica | L. | Diapensiaceae | 8 |
| Dichanthelium lanuginosum | (Elliott) Gould | Poaceae | 8 |
| Diervilla lonicera | Mill. | Caprifoliaceae | 8 |
| Diphasiastrum alpinum | (L.) Holub | Lycopodiaceae | 8 |
| Diphasiastrum complanatum | (L.) Holub | Lycopodiaceae | 8 |
| Diphasiastrum digitatum | (Dill. ex A.Braun) Holub | Lycopodiaceae | 8 |
| Diphasiastrum sitchense | (Rupr.) Holub | Lycopodiaceae | 8 |
| Diphasiastrum tristachyum | (Pursh) Holub | Lycopodiaceae | 8 |
| Doellingeria umbellata | (Mill.) Nees | Asteraceae | 8 |
| Draba arabisans | Michx. | Brassicaceae | 8 |
| Draba aurea | Vahl ex Hornem. | Brassicaceae | 8 |
| Draba glabella | Pursh | Brassicaceae | 8 |
| Dracocephalum parviflorum | Nutt. | Lamiaceae | 8 |
| Drosera anglica | Huds. | Droseraceae | 8 |
| Drosera intermedia | Hayne | Droseraceae | 8 |
| Drosera linearis | Goldie | Droseraceae | 8 |
| Drosera rotundifolia | L. | Droseraceae | 8 |
| Dryas drummondii | Richardson ex Hook. | Rosaceae | 8 |
| Dryas integrifolia | Vahl | Rosaceae | 8 |
| Dryopteris campyloptera | Clarkson | Dryopteridaceae | 8 |
| Dryopteris carthusiana | (Vill.) H.P.Fuchs | Dryopteridaceae | 8 |
| Dryopteris cristata | (L.) A.Gray | Dryopteridaceae | 8 |
| Dryopteris expansa | (C.Presl) Fraser-Jenk. & Jermy | Dryopteridaceae | 8 |
| Dryopteris filix-mas | (L.) Schott | Dryopteridaceae | 8 |
| Dryopteris fragrans | (L.) Schott | Dryopteridaceae | 8 |
| Dryopteris intermedia | A.Gray | Dryopteridaceae | 8 |
| Dryopteris marginalis | (L.) A.Gray | Dryopteridaceae | 8 |
| Dulichium arundinaceum | (L.) Britton | Cyperaceae | 8 |
| Eleocharis acicularis | (L.) Roem. & Schult. | Cyperaceae | 8 |
| Eleocharis elliptica | Kunth | Cyperaceae | 8 |
| Eleocharis erythropoda | Steud. | Cyperaceae | 8 |
| Eleocharis nitida | Fernald | Cyperaceae | 8 |
| Eleocharis ovata | (Roth) Roem. & Schult. | Cyperaceae | 8 |
| Eleocharis palustris | (L.) Roem. & Schult. | Cyperaceae | 8 |
| Eleocharis parvula | (Roem. & Schult.) Link ex Bluff, Nees & Schauer | Cyperaceae | 8 |
| Eleocharis quinqueflora | (Hartmann) O.Schwarz | Cyperaceae | 8 |
| Eleocharis uniglumis | (Link) Schult. | Cyperaceae | 8 |
| Elymus violaceus | (Hornem.) J.Feilberg | Poaceae | 8 |
| Elymus virginicus | L. | Poaceae | 8 |
| Empetrum atropurpureum | Fernald & Wiegand | Ericaceae | 8 |
| Empetrum eamesii | Fernald & Wiegand | Ericaceae | 8 |
| Empetrum nigrum | L. | Ericaceae | 8 |
| Epigaea repens | L. | Ericaceae | 8 |
| Epilobium anagallidifolium | Lam. | Onagraceae | 8 |
| Epilobium angustifolium | L. | Onagraceae | 8 |
| Epilobium ciliatum | Raf. | Onagraceae | 8 |
| Epilobium coloratum | Muhl. ex Willd. | Onagraceae | 8 |
| Epilobium densum | Raf. | 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 |
| Erigeron annuus | (L.) Desf. | Asteraceae | 8 |
| Erigeron compositus | Pursh | Asteraceae | 8 |
| Erigeron hyssopifolius | Michx. | Asteraceae | 8 |
| Eriocaulon aquaticum | (Hill) Druce | Eriocaulaceae | 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 tenellum | Nutt. | Cyperaceae | 8 |
| Eriophorum vaginatum | L. | Cyperaceae | 8 |
| Eriophorum virginicum | L. | Cyperaceae | 8 |
| Eriophorum viridicarinatum | (Engelm.) Fernald | Cyperaceae | 8 |
| Erysimum coarctatum | Fernald | Brassicaceae | 8 |
| Erythronium americanum | Ker Gawl. | Liliaceae | 8 |
| Euphrasia frigida | Pugsley | Orobanchaceae | 8 |
| Euphrasia salisburgensis | Funck ex Hoppe | Orobanchaceae | 8 |
| Eurybia radula | (Aiton) G.L.Nesom | Asteraceae | 8 |
| Eutrochium maculatum | (L.) E.E.Lamont | Asteraceae | 8 |
| Festuca brachyphylla | Schult. & Schult.f. | Poaceae | 8 |
| Fragaria vesca | L. | Rosaceae | 8 |
| Fragaria virginiana | Mill. | Rosaceae | 8 |
| Fraxinus nigra | Marshall | Oleaceae | 8 |
| Galearis rotundifolia | (Banks ex Pursh) R.M.Bateman | Orchidaceae | 8 |
| Galium asprellum | Michx. | Rubiaceae | 8 |
| Galium kamtschaticum | Steller ex Schult. & Schult.f. | Rubiaceae | 8 |
| Galium trifidum | L. | Rubiaceae | 8 |
| Galium triflorum | Michx. | Rubiaceae | 8 |
| Gaultheria hispidula | (L.) Muhl. ex Bigelow | Ericaceae | 8 |
| Gaultheria procumbens | L. | Ericaceae | 8 |
| Gaylussacia baccata | (Wangenh.) K.Koch | Ericaceae | 8 |
| Gaylussacia bigeloviana | (Fernald) Sorrie & Weakley | Ericaceae | 8 |
| Gentianella propinqua | (Richardson) J.M.Gillett | Gentianaceae | 8 |
| Geocaulon lividum | (Richardson) Fernald | Santalaceae | 8 |
| Geranium bicknellii | Britton | Geraniaceae | 8 |
| Geranium robertianum | L. | Geraniaceae | 8 |
| Geum macrophyllum | Willd. | Rosaceae | 8 |
| Geum rivale | L. | Rosaceae | 8 |
| Glyceria borealis | (Nash) Batch. | Poaceae | 8 |
| Glyceria canadensis | (Michx.) Trin. | Poaceae | 8 |
| Glyceria grandis | S.Watson | Poaceae | 8 |
| Glyceria striata | (Lam.) Hitchc. | Poaceae | 8 |
| Gnaphalium supinum | L. | Asteraceae | 8 |
| Gnaphalium uliginosum | L. | Asteraceae | 8 |
| Goodyera oblongifolia | Raf. | Orchidaceae | 8 |
| Goodyera repens | (L.) R.Br. | Orchidaceae | 8 |
| Goodyera tesselata | G.Lodd. | Orchidaceae | 8 |
| Gratiola neglecta | Torr. | Plantaginaceae | 8 |
| Gymnocarpium dryopteris | (L.) Newman | Cystopteridaceae | 8 |
| Gymnocarpium robertianum | (Hoffm.) Newman | Cystopteridaceae | 8 |
| Halenia deflexa | (Sm.) Griseb. | Gentianaceae | 8 |
| Halerpestes cymbalaria | Greene | Ranunculaceae | 8 |
| Harrimanella hypnoides | (L.) Coville | Ericaceae | 8 |
| Hedysarum alpinum | L. | Fabaceae | 8 |
| Hedysarum boreale | Nutt. | Fabaceae | 8 |
| Helianthus giganteus | L. | Asteraceae | 8 |
| Heliopsis helianthoides | Sweet | Asteraceae | 8 |
| Heracleum maximum | W.Bartram | Apiaceae | 8 |
| Hieracium lachenalii | Suter | Asteraceae | 8 |
| Hieracium umbellatum | L. | Asteraceae | 8 |
| Hippuris vulgaris | L. | Plantaginaceae | 8 |
| Honckenya peploides | (L.) Ehrh. | Caryophyllaceae | 8 |
| Hordeum brachyantherum | Nevski | Poaceae | 8 |
| Hordeum jubatum | L. | Poaceae | 8 |
| Houstonia caerulea | L. | Rubiaceae | 8 |
| Hudsonia ericoides | L. | Cistaceae | 8 |
| Humulus americanus | Nutt. | Cannabaceae | 8 |
| Huperzia continentalis | Testo, A.Haines & A.V.Gilman | Lycopodiaceae | 8 |
| Huperzia lucidula | (Michx.) Trevis. | Lycopodiaceae | 8 |
| Huperzia miyoshiana | (Makino) Ching | Lycopodiaceae | 8 |
| Huperzia selago | (L.) Bernh. ex Schrank & Mart. | Lycopodiaceae | 8 |
| Hydrocotyle americana | L. | Araliaceae | 8 |
| Hydrogalium claytonii | (Michx.) Kadereit & Schneew. | Rubiaceae | 8 |
| Hydrogalium labradoricum | (Wiegand) Kadereit & Schneew. | Rubiaceae | 8 |
| Hydrogalium palustre | (L.) Kadereit & Schneew. | Rubiaceae | 8 |
| Hypericum boreale | (Britton) E.P.Bicknell | Hypericaceae | 8 |
| Hypericum canadense | L. | Hypericaceae | 8 |
| Hypericum ellipticum | Hook. | Hypericaceae | 8 |
| Hypericum fraseri | (Spach) Steud. | Hypericaceae | 8 |
| Hypericum punctatum | Lam. | Hypericaceae | 8 |
| Hypopitys monotropa | Crantz | Ericaceae | 8 |
| Ilex mucronata | (L.) M.Powell, Savol. & S.Andrews | Aquifoliaceae | 8 |
| Ilex verticillata | (L.) A.Gray | Aquifoliaceae | 8 |
| Impatiens capensis | Meerb. | Balsaminaceae | 8 |
| Impatiens pallida | Nutt. | Balsaminaceae | 8 |
| Iris hookeri | Penny ex G.Don | Iridaceae | 8 |
| Iris versicolor | L. | Iridaceae | 8 |
| Isoetes echinospora | Durieu | Isoetaceae | 8 |
| Juncus alpinoarticulatus | Chaix | Juncaceae | 8 |
| Juncus articulatus | L. | Juncaceae | 8 |
| Juncus balticus | Willd. | Juncaceae | 8 |
| Juncus bufonius | L. | Juncaceae | 8 |
| Juncus canadensis | J.Gay ex Laharpe | Juncaceae | 8 |
| Juncus dudleyi | Wiegand | Juncaceae | 8 |
| Juncus effusus | L. | Juncaceae | 8 |
| Juncus filiformis | L. | Juncaceae | 8 |
| Juncus gerardi | Loisel. | Juncaceae | 8 |
| Juncus militaris | Bigelow | Juncaceae | 8 |
| Juncus nodosus | L. | Juncaceae | 8 |
| Juncus pelocarpus | E.Mey. | Juncaceae | 8 |
| Juncus pylaei | Laharpe | Juncaceae | 8 |
| Juncus stygius | L. | Juncaceae | 8 |
| Juncus tenuis | Willd. | Juncaceae | 8 |
| Juncus tweedyi | Rydb. | Juncaceae | 8 |
| Juniperus communis | L. | Cupressaceae | 8 |
| Juniperus horizontalis | Moench | Cupressaceae | 8 |
| Kalmia angustifolia | L. | Ericaceae | 8 |
| Kalmia polifolia | Wangenh. | Ericaceae | 8 |
| Kalmia procumbens | (L.) Gift, Kron & P.F.Stevens ex Galasso, Banfi & F.Conti | Ericaceae | 8 |
| Koeleria spicata | (L.) Barberá, Quintanar, Soreng & P.M.Peterson | Poaceae | 8 |
| Lactuca biennis | (Moench) Fernald | Asteraceae | 8 |
| Laportea canadensis | (L.) Wedd. | Urticaceae | 8 |
| Larix laricina | (Du Roi) K.Koch | Pinaceae | 8 |
| Lathyrus japonicus | Willd. | Fabaceae | 8 |
| Lathyrus palustris | L. | Fabaceae | 8 |
| Lechea intermedia | Legg. ex Britton | Cistaceae | 8 |
| Lemna minor | L. | Araceae | 8 |
| Lepidium densiflorum | Schrad. | Brassicaceae | 8 |
| Lepidium virginicum | L. | Brassicaceae | 8 |
| Leymus mollis | (Trin.) Pilg. | Poaceae | 8 |
| Limonium carolinianum | (Walter) Britton | Plumbaginaceae | 8 |
| Limosella australis | R.Br. | Plantaginaceae | 8 |
| Linnaea borealis | L. | Caprifoliaceae | 8 |
| Liparis loeselii | (L.) Rich. | Orchidaceae | 8 |
| Lobelia dortmanna | L. | Campanulaceae | 8 |
| Lobelia kalmii | L. | Campanulaceae | 8 |
| Lomatogonium rotatum | (L.) Fernald | Gentianaceae | 8 |
| Lonicera villosa | (Michx.) Schult. | Caprifoliaceae | 8 |
| Ludwigia palustris | (L.) Elliott | Onagraceae | 8 |
| Luzula acuminata | Raf. | Juncaceae | 8 |
| Luzula multiflora | (Ehrh.) Lej. | Juncaceae | 8 |
| Luzula parviflora | (Ehrh.) Desv. | Juncaceae | 8 |
| Luzula spicata | (L.) DC. | Juncaceae | 8 |
| Lycopodiella appressa | (Chapm.) Cranfill | Lycopodiaceae | 8 |
| Lycopodiella inundata | (L.) Holub | Lycopodiaceae | 8 |
| Lycopodium clavatum | L. | Lycopodiaceae | 8 |
| Lycopodium lagopus | Zinserl. ex Kuzen. | Lycopodiaceae | 8 |
| Lycopus americanus | Muhl. ex W.P.C.Barton | Lamiaceae | 8 |
| Lycopus uniflorus | Michx. | Lamiaceae | 8 |
| Lysimachia borealis | (Raf.) U.Manns & Anderb. | Primulaceae | 8 |
| Lysimachia maritima | (L.) Galasso, Banfi & Soldano | Primulaceae | 8 |
| Lysimachia terrestris | (L.) Britton, Sterns & Poggenb. | 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 |
| Malaxis unifolia | Michx. | Orchidaceae | 8 |
| Mentha canadensis | L. | Lamiaceae | 8 |
| Menyanthes trifoliata | L. | Menyanthaceae | 8 |
| Mertensia maritima | (L.) Gray | Boraginaceae | 8 |
| Micranthes foliolosa | (R.Br.) Gornall | Saxifragaceae | 8 |
| Milium effusum | L. | Poaceae | 8 |
| Mitchella repens | L. | Rubiaceae | 8 |
| Mitella nuda | L. | Saxifragaceae | 8 |
| Moehringia lateriflora | (L.) 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 uniflora | (Muhl.) Fernald | Poaceae | 8 |
| Myosotis laxa | Lehm. | Boraginaceae | 8 |
| Myrica gale | L. | Myricaceae | 8 |
| Myrica pensylvanica | Mirb. | Myricaceae | 8 |
| Myriophyllum alterniflorum | DC. | Haloragaceae | 8 |
| Myriophyllum farwellii | Morong | Haloragaceae | 8 |
| Myriophyllum sibiricum | Kom. | Haloragaceae | 8 |
| Myriophyllum verticillatum | L. | Haloragaceae | 8 |
| Nabalus racemosus | (Michx.) Hook. | Asteraceae | 8 |
| Nabalus trifoliolatus | Cass. | Asteraceae | 8 |
| Najas flexilis | (Willd.) Rostk. & W.L.E.Schmidt | Hydrocharitaceae | 8 |
| Nardus stricta | L. | Poaceae | 8 |
| Neottia borealis | (Morong) Szlach. | Orchidaceae | 8 |
| Neottia convallarioides | (Sw.) Rich. | Orchidaceae | 8 |
| Neottia cordata | (L.) Rich. | Orchidaceae | 8 |
| Nuphar variegata | Engelm. ex Durand | Nymphaeaceae | 8 |
| Nymphaea odorata | Aiton | Nymphaeaceae | 8 |
| Nymphoides cordata | (Elliott) Fernald | Menyanthaceae | 8 |
| Oclemena acuminata | (Michx.) Greene | Asteraceae | 8 |
| Oclemena nemoralis | (Aiton) Greene | Asteraceae | 8 |
| Oenothera parviflora | L. | Onagraceae | 8 |
| Onoclea sensibilis | L. | Onocleaceae | 8 |
| Ophioglossum pusillum | Raf. | Ophioglossaceae | 8 |
| Oreojuncus trifidus | (L.) Záv.Drábk. & Kirschner | Juncaceae | 8 |
| Oreopteris quelpartensis | (Christ) Holub | Thelypteridaceae | 8 |
| Orobanche uniflora | L. | Orobanchaceae | 8 |
| Orthilia secunda | (L.) House | Ericaceae | 8 |
| Oryzopsis asperifolia | Michx. | Poaceae | 8 |
| Osmorhiza berteroi | DC. | Apiaceae | 8 |
| Osmorhiza depauperata | Phil. | Apiaceae | 8 |
| Osmunda spectabilis | Willd. | Osmundaceae | 8 |
| Osmundastrum cinnamomeum | (L.) C.Presl | Osmundaceae | 8 |
| Oxalis montana | Raf. | Oxalidaceae | 8 |
| Oxalis stricta | L. | Oxalidaceae | 8 |
| Oxyria digyna | (L.) Hill | Polygonaceae | 8 |
| Oxytropis campestris | (L.) DC. | Fabaceae | 8 |
| Oxytropis deflexa | (Pall.) DC. | Fabaceae | 8 |
| Packera aurea | (L.) Á.Löve & D.Löve | Asteraceae | 8 |
| Packera cymbalaria | (Pursh) W.A.Weber & Á.Löve | Asteraceae | 8 |
| Packera pauciflora | (Pursh) Á.Löve & D.Löve | Asteraceae | 8 |
| Packera paupercula | (Michx.) Á.Löve & D.Löve | Asteraceae | 8 |
| Parnassia glauca | Raf. | Celastraceae | 8 |
| Parnassia kotzebuei | Cham. ex Spreng. | Celastraceae | 8 |
| Parnassia palustris | L. | Celastraceae | 8 |
| Parnassia parviflora | DC. | Celastraceae | 8 |
| Pedicularis flammea | L. | Orobanchaceae | 8 |
| Pedicularis groenlandica | Retz. | Orobanchaceae | 8 |
| Pedicularis palustris | L. | Orobanchaceae | 8 |
| Persicaria amphibia | (L.) Delarbre | Polygonaceae | 8 |
| Persicaria lapathifolia | (L.) Delarbre | Polygonaceae | 8 |
| Persicaria sagittata | (L.) H.Gross | Polygonaceae | 8 |
| Persicaria vivipara | (L.) Ronse Decr. | Polygonaceae | 8 |
| Petasites frigidus | (L.) Fr. | Asteraceae | 8 |
| Phalaris arundinacea | L. | Poaceae | 8 |
| Phegopteris connectilis | (Michx.) Watt | Thelypteridaceae | 8 |
| Phleum alpinum | L. | Poaceae | 8 |
| Phyllodoce caerulea | (L.) Bab. | Ericaceae | 8 |
| Physostegia virginiana | (L.) Benth. | Lamiaceae | 8 |
| Picea glauca | (Moench) Voss | Pinaceae | 8 |
| Picea mariana | Britton, Sterns & Poggenb. | Pinaceae | 8 |
| Picea rubens | Sarg. | Pinaceae | 8 |
| Pinguicula vulgaris | L. | Lentibulariaceae | 8 |
| Pinus resinosa | Aiton | Pinaceae | 8 |
| Pinus strobus | L. | Pinaceae | 8 |
| Plantago maritima | L. | Plantaginaceae | 8 |
| Platanthera aquilonis | Sheviak | Orchidaceae | 8 |
| Platanthera blephariglottis | (Willd.) Lindl. | Orchidaceae | 8 |
| Platanthera clavellata | (Michx.) Luer | Orchidaceae | 8 |
| Platanthera dilatata | (Pursh) Lindl. ex L.C.Beck | Orchidaceae | 8 |
| Platanthera grandiflora | (Bigelow) Lindl. | Orchidaceae | 8 |
| Platanthera hookeri | (Torr.) Lindl. | Orchidaceae | 8 |
| Platanthera huronensis | Lindl. | Orchidaceae | 8 |
| Platanthera lacera | (Michx.) G.Don | Orchidaceae | 8 |
| Platanthera obtusata | (Banks ex Pursh) Lindl. | Orchidaceae | 8 |
| Platanthera orbiculata | (Pursh) Lindl. | Orchidaceae | 8 |
| Platanthera psycodes | (L.) Lindl. | Orchidaceae | 8 |
| Platanthera unalascensis | (Spreng.) Kurtz | Orchidaceae | 8 |
| Poa alpina | L. | Poaceae | 8 |
| Poa alsodes | A.Gray | Poaceae | 8 |
| Poa arctica | R.Br. | Poaceae | 8 |
| Poa glauca | Vahl | Poaceae | 8 |
| Poa palustris | L. | Poaceae | 8 |
| Pogonia ophioglossoides | (L.) Ker Gawl. | Orchidaceae | 8 |
| Polypodium appalachianum | Haufler & Windham | Polypodiaceae | 8 |
| Polypodium virginianum | L. | Polypodiaceae | 8 |
| Polystichum braunii | (Spenn.) Fée | Dryopteridaceae | 8 |
| Polystichum lonchitis | (L.) Roth | Dryopteridaceae | 8 |
| Populus balsamifera | L. | Salicaceae | 8 |
| Populus tremuloides | Michx. | Salicaceae | 8 |
| Potamogeton alpinus | Balb. | Potamogetonaceae | 8 |
| Potamogeton amplifolius | Tuck. | Potamogetonaceae | 8 |
| Potamogeton berchtoldii | Fieber | Potamogetonaceae | 8 |
| Potamogeton epihydrus | Raf. | Potamogetonaceae | 8 |
| Potamogeton foliosus | Raf. | Potamogetonaceae | 8 |
| Potamogeton friesii | Rupr. | Potamogetonaceae | 8 |
| Potamogeton gramineus | L. | Potamogetonaceae | 8 |
| Potamogeton natans | L. | Potamogetonaceae | 8 |
| Potamogeton obtusifolius | Mert. & W.D.J.Koch | Potamogetonaceae | 8 |
| Potamogeton perfoliatus | L. | Potamogetonaceae | 8 |
| Potamogeton praelongus | Wulfen | Potamogetonaceae | 8 |
| Potamogeton richardsonii | Rydb. | Potamogetonaceae | 8 |
| Potamogeton robbinsii | Oakes | Potamogetonaceae | 8 |
| Potamogeton spirillus | Tuck. | Potamogetonaceae | 8 |
| Potamogeton strictifolius | A.Benn. | Potamogetonaceae | 8 |
| Potamogeton zosteriformis | Fernald | Potamogetonaceae | 8 |
| Potentilla crantzii | (Crantz) Beck ex Fritsch | Rosaceae | 8 |
| Potentilla litoralis | Rydb. | Rosaceae | 8 |
| Potentilla nivea | L. | Rosaceae | 8 |
| Potentilla norvegica | L. | Rosaceae | 8 |
| Potentilla simplex | Michx. | Rosaceae | 8 |
| Potentilla sterilis | (L.) Garcke | Rosaceae | 8 |
| Primula egaliksensis | Wormsk. | Primulaceae | 8 |
| Primula laurentiana | Fernald | Primulaceae | 8 |
| Primula mistassinica | Michx. | Primulaceae | 8 |
| Proserpinaca pectinata | Lam. | Haloragaceae | 8 |
| Prunella vulgaris | L. | Lamiaceae | 8 |
| Prunus pensylvanica | L.f. | Rosaceae | 8 |
| Prunus virginiana | L. | Rosaceae | 8 |
| Pseudorchis albida | (L.) Á.Löve & D.Löve | Orchidaceae | 8 |
| Pyrola americana | Sweet | Ericaceae | 8 |
| Pyrola asarifolia | Michx. | Ericaceae | 8 |
| Pyrola chlorantha | Sw. | Ericaceae | 8 |
| Pyrola elliptica | Nutt. | Ericaceae | 8 |
| Pyrola minor | L. | Ericaceae | 8 |
| Ranunculus abortivus | L. | Ranunculaceae | 8 |
| Ranunculus flammula | L. | Ranunculaceae | 8 |
| Ranunculus gmelinii | DC. | Ranunculaceae | 8 |
| Ranunculus hederaceus | L. | Ranunculaceae | 8 |
| Ranunculus hyperboreus | Rottb. | Ranunculaceae | 8 |
| Ranunculus lapponicus | L. | Ranunculaceae | 8 |
| Ranunculus macounii | Britton | Ranunculaceae | 8 |
| Ranunculus pensylvanicus | L.f. | Ranunculaceae | 8 |
| Ranunculus recurvatus | Poir. | Ranunculaceae | 8 |
| Ranunculus reptans | L. | Ranunculaceae | 8 |
| Ranunculus sceleratus | L. | Ranunculaceae | 8 |
| Ranunculus trichophyllus | Chaix | Ranunculaceae | 8 |
| Rhamnus alnifolia | L'Hér. | Rhamnaceae | 8 |
| Rhinanthus groenlandicus | Chabert | Orobanchaceae | 8 |
| Rhodiola rosea | L. | Crassulaceae | 8 |
| Rhododendron canadense | (L.) Torr. | Ericaceae | 8 |
| Rhododendron groenlandicum | (Oeder) Kron & Judd | Ericaceae | 8 |
| Rhododendron lapponicum | (L.) Wahlenb. | Ericaceae | 8 |
| Rhynchospora alba | (L.) Vahl | Cyperaceae | 8 |
| Rhynchospora capillacea | Torr. | Cyperaceae | 8 |
| Rhynchospora fusca | (L.) W.T.Aiton | Cyperaceae | 8 |
| Ribes glandulosum | Weber | Grossulariaceae | 8 |
| Ribes hirtellum | Michx. | 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 nitida | Willd. | Rosaceae | 8 |
| Rosa virginiana | Mill. | Rosaceae | 8 |
| Rosa woodsii | Lindl. | Rosaceae | 8 |
| Rubus arcticus | L. | Rosaceae | 8 |
| Rubus canadensis | L. | Rosaceae | 8 |
| Rubus chamaemorus | L. | Rosaceae | 8 |
| Rubus hispidus | L. | Rosaceae | 8 |
| Rubus idaeus | L. | Rosaceae | 8 |
| Rubus pubescens | Raf. | Rosaceae | 8 |
| Rumex britannica | L. | Polygonaceae | 8 |
| Rumex occidentalis | S.Watson | Polygonaceae | 8 |
| Rumex triangulivalvis | (Danser) Rech.f. | Polygonaceae | 8 |
| Ruppia maritima | L. | 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 latifolia | Willd. | Alismataceae | 8 |
| Salix arctica | Pall. | Salicaceae | 8 |
| Salix arctophila | Cockerell ex A.Heller | Salicaceae | 8 |
| Salix bebbiana | Sarg. | Salicaceae | 8 |
| Salix candida | Flüggé ex Willd. | Salicaceae | 8 |
| Salix cordata | Michx. | Salicaceae | 8 |
| Salix discolor | Muhl. | Salicaceae | 8 |
| Salix eriocephala | Michx. | Salicaceae | 8 |
| Salix glauca | L. | Salicaceae | 8 |
| Salix herbacea | L. | Salicaceae | 8 |
| Salix humilis | Marshall | Salicaceae | 8 |
| Salix lucida | Muhl. | Salicaceae | 8 |
| Salix myricoides | Muhl. | Salicaceae | 8 |
| Salix myrtillifolia | Andersson | Salicaceae | 8 |
| Salix pedicellaris | Pursh | Salicaceae | 8 |
| Salix pellita | (Andersson) Bebb | Salicaceae | 8 |
| Salix planifolia | Pursh | Salicaceae | 8 |
| Salix pyrifolia | Andersson | Salicaceae | 8 |
| Salix reticulata | L. | Salicaceae | 8 |
| Salix serissima | (L.H.Bailey ex Arthur) Fernald | Salicaceae | 8 |
| Salix uva-ursi | Pursh | Salicaceae | 8 |
| Salix vestita | Pursh | Salicaceae | 8 |
| Sambucus racemosa | L. | Viburnaceae | 8 |
| Sanguisorba canadensis | L. | Rosaceae | 8 |
| Sanicula marilandica | L. | Apiaceae | 8 |
| Sarracenia purpurea | L. | Sarraceniaceae | 8 |
| Saxifraga aizoides | L. | Saxifragaceae | 8 |
| Saxifraga cespitosa | L. | Saxifragaceae | 8 |
| Saxifraga oppositifolia | L. | Saxifragaceae | 8 |
| Saxifraga paniculata | Mill. | Saxifragaceae | 8 |
| Saxifraga rivularis | L. | Saxifragaceae | 8 |
| Sceptridium multifidum | (S.G.Gmel.) M.Nishida | Ophioglossaceae | 8 |
| Scheuchzeria palustris | L. | Scheuchzeriaceae | 8 |
| Schizachne purpurascens | (Torr.) Swallen | Poaceae | 8 |
| Schizaea pusilla | Pursh | Schizaeaceae | 8 |
| Schoenoplectus acutus | (Muhl. ex Bigelow) Á.Löve & D.Löve | Cyperaceae | 8 |
| Schoenoplectus pungens | (Vahl) Palla | Cyperaceae | 8 |
| Schoenoplectus subterminalis | (Torr.) Soják | Cyperaceae | 8 |
| Schoenoplectus tabernaemontani | (C.C.Gmel.) Palla | Cyperaceae | 8 |
| Scirpus atrocinctus | Fernald | Cyperaceae | 8 |
| Scirpus atrovirens | Willd. | Cyperaceae | 8 |
| Scirpus cyperinus | (L.) Kunth | Cyperaceae | 8 |
| Scirpus hattorianus | Makino | Cyperaceae | 8 |
| Scirpus microcarpus | J.Presl & C.Presl | Cyperaceae | 8 |
| Scirpus pedicellatus | Fernald | Cyperaceae | 8 |
| Scutellaria galericulata | L. | Lamiaceae | 8 |
| Scutellaria lateriflora | L. | Lamiaceae | 8 |
| Selaginella spinulosa | A.Braun ex Döll | Selaginellaceae | 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 |
| Sisyrinchium angustifolium | Mill. | Iridaceae | 8 |
| Sisyrinchium montanum | Greene | Iridaceae | 8 |
| Sitobolium punctilobulum | (Michx.) Desv. | Dennstaedtiaceae | 8 |
| Sium suave | Walter | Apiaceae | 8 |
| Solidago bartramiana | Fernald | Asteraceae | 8 |
| Solidago hispida | Muhl. ex Willd. | Asteraceae | 8 |
| Solidago macrophylla | Herb.Banks ex Pursh | Asteraceae | 8 |
| Solidago multiradiata | Aiton | Asteraceae | 8 |
| Solidago rugosa | Mill. | Asteraceae | 8 |
| Solidago sempervirens | L. | Asteraceae | 8 |
| Solidago uliginosa | Nutt. | Asteraceae | 8 |
| Sorbus americana | Marshall | Rosaceae | 8 |
| Sorbus decora | (Sarg.) C.K.Schneid. | Rosaceae | 8 |
| Sparganium americanum | Nutt. | Typhaceae | 8 |
| Sparganium angustifolium | Michx. | Typhaceae | 8 |
| Sparganium emersum | Rehmann | Typhaceae | 8 |
| Sparganium fluctuans | (Engelm.) B.L.Rob. | Typhaceae | 8 |
| Sparganium natans | L. | Typhaceae | 8 |
| Spergularia canadensis | (Pers.) G.Don | Caryophyllaceae | 8 |
| Sphenopholis intermedia | (Rydb.) Rydb. | Poaceae | 8 |
| Spinulum annotinum | (L.) A.Haines | Lycopodiaceae | 8 |
| Spiraea alba | Du Roi | Rosaceae | 8 |
| Spiranthes romanzoffiana | Cham. | Orchidaceae | 8 |
| Sporobolus alterniflorus | (Loisel.) P.M.Peterson & Saarela | Poaceae | 8 |
| Sporobolus michauxianus | (Hitchc.) P.M.Peterson & Saarela | Poaceae | 8 |
| Sporobolus pumilus | (Roth) P.M.Peterson & Saarela | Poaceae | 8 |
| Stachys pilosa | Nutt. | Lamiaceae | 8 |
| Stellaria borealis | Bigelow | Caryophyllaceae | 8 |
| Stellaria crassifolia | Ehrh. | 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 |
| Streptopus lanceolatus | (Aiton) Reveal | Liliaceae | 8 |
| Stuckenia filiformis | (Pers.) Börner | Potamogetonaceae | 8 |
| Stuckenia pectinata | (L.) Börner | Potamogetonaceae | 8 |
| Suaeda calceoliformis | (Hook.) Moq. | Chenopodiaceae | 8 |
| Suaeda maritima | (L.) Dumort. | Chenopodiaceae | 8 |
| Subularia aquatica | L. | Brassicaceae | 8 |
| Symphyotrichum boreale | (Torr. & A.Gray) Á.Löve & D.Löve | Asteraceae | 8 |
| Symphyotrichum lanceolatum | (Willd.) G.L.Nesom | Asteraceae | 8 |
| Symphyotrichum novi-belgii | (L.) G.L.Nesom | Asteraceae | 8 |
| Tanacetum bipinnatum | Sch.Bip. | Asteraceae | 8 |
| Taxus canadensis | Marshall | Taxaceae | 8 |
| Thalictrum alpinum | L. | Ranunculaceae | 8 |
| Thalictrum pubescens | Pursh | Ranunculaceae | 8 |
| Thelypteris palustris | Schott | Thelypteridaceae | 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 |
| Trillium cernuum | L. | Melanthiaceae | 8 |
| Typha latifolia | L. | Typhaceae | 8 |
| Urtica gracilis | Aiton | Urticaceae | 8 |
| Utricularia cornuta | Michx. | Lentibulariaceae | 8 |
| Utricularia geminiscapa | Benj. | Lentibulariaceae | 8 |
| Utricularia intermedia | Hayne | Lentibulariaceae | 8 |
| Utricularia macrorhiza | Leconte | Lentibulariaceae | 8 |
| Utricularia minor | L. | Lentibulariaceae | 8 |
| Utricularia purpurea | Walter | Lentibulariaceae | 8 |
| Vaccinium angustifolium | Aiton | Ericaceae | 8 |
| Vaccinium boreale | I.V.Hall & Aalders | Ericaceae | 8 |
| Vaccinium cespitosum | Michx. | Ericaceae | 8 |
| Vaccinium macrocarpon | Aiton | Ericaceae | 8 |
| Vaccinium ovalifolium | Sm. | 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 dioica | L. | Caprifoliaceae | 8 |
| Veronica americana | (Raf.) Schwein. ex Benth. | Plantaginaceae | 8 |
| Veronica peregrina | L. | Plantaginaceae | 8 |
| Veronica scutellata | L. | Plantaginaceae | 8 |
| Veronica serpyllifolia | L. | Plantaginaceae | 8 |
| Veronica wormskjoldii | Roem. & Schult. | Plantaginaceae | 8 |
| Viburnum cassinoides | L. | Viburnaceae | 8 |
| Viburnum edule | (Michx.) Raf. | Viburnaceae | 8 |
| Viburnum opulus | L. | Viburnaceae | 8 |
| Viola adunca | Sm. | Violaceae | 8 |
| Viola blanda | Willd. | Violaceae | 8 |
| Viola cucullata | Aiton | Violaceae | 8 |
| Viola labradorica | Schrank | Violaceae | 8 |
| Viola lanceolata | L. | 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 |
| Viola selkirkii | Pursh ex Goldie | Violaceae | 8 |
| Viola sororia | Willd. | Violaceae | 8 |
| Viscaria alpina | (L.) G.Don | Caryophyllaceae | 8 |
| Woodsia alpina | (Bolton) Gray | Woodsiaceae | 8 |
| Woodsia glabella | R.Br. | Woodsiaceae | 8 |
| Woodsia ilvensis | (L.) R.Br. | Woodsiaceae | 8 |
| Xyris montana | Ries | Xyridaceae | 8 |
| Zannichellia palustris | L. | Potamogetonaceae | 8 |
| Zizania aquatica | L. | Poaceae | 8 |
| Zostera marina | L. | Zosteraceae | 8 |
| Adiantum viridimontanum | C.A.Paris | Pteridaceae | 7 |
| Crataegus jonesiae | Sarg. | Rosaceae | 7 |
| Festuca saximontana | Rydb. | Poaceae | 7 |
| Isoetes lacustris | L. | Isoetaceae | 7 |
| Neottia auriculata | (Wiegand) Szlach. | Orchidaceae | 7 |
| Carex conoidea | Willd. | Cyperaceae | 6 |
| Carex wiegandii | Mack. | Cyperaceae | 6 |
| Draba incana | L. | Brassicaceae | 6 |
| Euphrasia oakesii | Wettst. | Orobanchaceae | 6 |
| Juncus triglumis | L. | Juncaceae | 6 |
| Antennaria alpina | (L.) Gaertn. | Asteraceae | 5 |
| Blysmus rufus | (Huds.) Link | Cyperaceae | 5 |
| Carex oederi | Retz. | Cyperaceae | 5 |
| Myriophyllum tenellum | Bigelow | Haloragaceae | 5 |
| Potamogeton confervoides | Rchb. | Potamogetonaceae | 5 |
| Puccinellia phryganodes | (Trin.) Scribn. & Merr. | Poaceae | 5 |
| Sparganium hyperboreum | Laest. ex Beurl. | Typhaceae | 5 |
| Agrostis mertensii | Trin. | Poaceae | 4 |
| Cochlearia tridactylites | Banks ex DC. | Brassicaceae | 4 |
| Draba nivalis | Lilj. | Brassicaceae | 4 |
| Juncus subcaudatus | (Engelm.) Coville & S.F.Blake | Juncaceae | 4 |
| Lepidium ramosissimum | A.Nelson | Brassicaceae | 4 |
| Littorella americana | Fernald | Plantaginaceae | 4 |
| Potamogeton oakesianus | J.W.Robbins | Potamogetonaceae | 4 |
| Salix calcicola | Fernald & Wiegand | Salicaceae | 4 |
| Carex stylosa | C.A.Mey. | Cyperaceae | 3 |
| Carex subspathacea | Wormsk. ex Hornem. | Cyperaceae | 3 |
| Cherleria marcescens | (Fernald) A.J.Moore & Dillenb. | Caryophyllaceae | 3 |
| Draba lactea | Adams | Brassicaceae | 3 |
| Festuca richardsonii | Hook. | Poaceae | 3 |
| Gentianella amarella | (L.) Börner | Gentianaceae | 3 |
| Juncus subtilis | E.Mey. | Juncaceae | 3 |
| Poa alpigena | Lindm. | Poaceae | 3 |
| Pteridium latiusculum | Hieron. | Dennstaedtiaceae | 3 |
| Salix jejuna | Fernald | Salicaceae | 3 |