| Scientific Name | English Common Name |
| Abutilon theophrasti | velvet-leaf |
| Acer campestre | field maple |
| Achillea millefolium var. alpicola | yarrow |
| Achillea millefolium var. borealis | yarrow |
| Achnatherum lemmonii | Lemons needlegrass |
| Achnatherum nelsonii | Columbia needlegrass |
| Achnatherum occidentale | stiff needlegrass |
| Acorus americanus | American sweet-flag |
| Aegilops cylindrica | jointed goatgrass |
| Agropyron desertorum | desert wheatgrass |
| Agrostis idahoensis | Idaho bentgrass |
| Agrostis mertensii | northern bentgrass |
| Agrostis oregonensis | Oregon bentgrass |
| Agrostis variabilis | mountain bentgrass |
| Alchemilla monticola | hairy lady's mantle |
| Alchemilla subcrenata | lady`s-mantle |
| Alisma lanceolatum | lance-leaved water-plantain |
| Allium geyeri | Geyer`s onion |
| Alnus viridis | green alder |
| Alopecurus arundinaceus | Creeping meadow foxtail |
| Alyssum murale | wall alyssum |
| Amaranthus blitoides | prostrate pigweed |
| Amaranthus powellii | Powell`s amaranth |
| Amaranthus powellii ssp. powellii | Powell's amaranth |
| Ambrosia psilostachya | western ragweed |
| Amsinckia menziesii | small-flowered fiddleneck |
| Anchusa azurea | Italian bugloss |
| Antennaria corymbosa | flat-top pussytoes |
| Antennaria howellii | Howell`s pussytoes |
| Anthriscus cerefolium | chervil |
| Apera interrupta | interrupted apera |
| Aphragmus eschscholtzianus | Eschscholtz`s little nightmare |
| Arabis holboellii var. secunda | Holboell`s rockcress |
| Arceuthobium douglasii | Douglas` dwarf mistletoe |
| Arceuthobium laricis | larch dwarf mistletoe |
| Arceuthobium tsugense ssp. mertensianae | mountain hemlock dwarf mistletoe |
| Arctanthemum arcticum ssp. arcticum | Arctic daisy |
| Arctophila fulva | pendantgrass |
| Aristida purpurea | red three-awn |
| Aristida purpurea var. longiseta | red three-awn |
| Arnica chamissonis ssp. chamissonis | meadow arnica |
| Arnica chamissonis ssp. foliosa | meadow arnica |
| Arnica griscomii | snow arnica |
| Arnica lonchophylla | long-leaf arnica |
| Arnica sororia | twin arnica |
| Artemisia furcata | three-forked mugwort |
| Artemisia ludoviciana ssp. candicans | western mugwort |
| Artemisia ludoviciana ssp. gnaphaloides | white sagebrush |
| Artemisia ludoviciana ssp. incompta | western mugwort |
| Artemisia ludoviciana ssp. ludoviciana | western mugwort |
| Asplenium trichomanes ssp. quadrivalens | limestone maidenhair spleenwort |
| Aster alpinus ssp. vierhapperi | alpine aster |
| Astragalus bourgovii | Bourgeau`s milk-vetch |
| Astragalus canadensis var. brevidens | Canadian milk-vetch |
| Astragalus canadensis var. canadensis | Canadian milk-vetch |
| Astragalus canadensis var. mortonii | Canadian milk-vetch |
| Astragalus miser var. miser | timber milk-vetch |
| Astragalus purshii | woollypod milk-vetch |
| Atriplex alaskensis | Alaskan orache |
| Atriplex argentea ssp. argentea | silvery orache |
| Atriplex longipes | long-stalked orache |
| Atriplex oblongifolia | oblong-leaved orache |
| Atriplex prostrata | triangle orache |
| Atriplex rosea | red orache |
| Betula papyrifera var. papyrifera | paper birch |
| Betula pubescens | silver birch |
| Bidens tripartita | three-parted beggarticks |
| Boechera calderi | Calder's suncress |
| Boechera collinsii | Collins' suncress |
| Boechera drepanoloba | pointing suncress |
| Boechera grahamii | Graham's suncress |
| Boechera lemmonii | wind-blown suncress |
| Boechera microphylla | crevice suncress |
| Boechera pauciflora | fuzzy suncress |
| Boechera paupercula | tiny suncress |
| Bolboschoenus fluviatilis | river bulrush |
| Bolboschoenus glaucus | bulbous bulrush |
| Botrychium lineare | linear-leaf moonwort |
| Brassica hirta | white mustard |
| Brassica napus | turnip |
| Braya humilis ssp. humilis | dwarf braya |
| Braya humilis ssp. maccallae | McCalla's dwarf braya |
| Braya humilis ssp. porsildii | Porsild's dwarf braya |
| Brickellia oblongifolia ssp. oblongifolia | narrow-leaved brickellia |
| Briza minor | small quaking grass |
| Bromus hordeaceus ssp. hordeaceus | soft brome |
| Bromus hordeaceus ssp. thominei | soft brome |
| Bromus japonicus | Japanese brome |
| Bromus richardsonii | Richardson's brome |
| Bromus secalinus | rye brome |
| Bromus squarrosus | corn brome |
| Bromus subvelutinus | hoary brome |
| Calamagrostis canadensis var. canadensis | bluejoint reedgrass |
| Calamagrostis canadensis var. langsdorfii | bluejoint reedgrass |
| Calamagrostis epigeios | chee reedgrass |
| Calamagrostis lapponica | Lapland reedgrass |
| Calamagrostis stricta ssp. stricta | slimstem reedgrass |
| Calamovilfa longifolia var. longifolia | prairie sandgrass |
| Callitriche heterophylla | Large Water-starwort |
| Callitriche heterophylla ssp. bolanderi | diverse-leaved water-starwort |
| Callitriche heterophylla ssp. heterophylla | two-edged water-starwort |
| Calystegia silvatica ssp. silvatica | shortstalk false bindweed |
| Camelina sativa | falseflax |
| Campanula lactiflora | European bellflower |
| Cardamine breweri var. breweri | Brewer`s bitter-cress |
| Cardamine breweri var. orbicularis | Brewer`s bitter-cress |
| Cardamine cordifolia var. lyallii | heart-leaved bitter-cress |
| Cardamine corymbosa | New Zealand bittercress |
| Cardamine flexuosa | wood bittercress |
| Cardamine occulta | wood bitter-cress |
| Cardamine parviflora var. arenicola | small-flowered bitter-cress |
| Cardamine umbellata | umbel bitter-cress |
| Cardaria draba ssp. chalapensis | Chalapa hoary-cress |
| Cardaria draba ssp. draba | heart-podded hoary-cress |
| Carex aenea | bronze sedge |
| Carex aquatilis ssp. stans | water sedge |
| Carex aquatilis var. aquatilis | water sedge |
| Carex arctiformis | polar sedge |
| Carex backii | Back`s sedge |
| Carex bicolor | two-coloured sedge |
| Carex brevior | short-beaked sedge |
| Carex brunnescens | brownish sedge |
| Carex brunnescens ssp. alaskana | brownish sedge |
| Carex brunnescens ssp. pacifica | brownish sedge |
| Carex canescens ssp. disjuncta | silvery sedge |
| Carex capitata | capitate sedge |
| Carex deflexa | bent sedge |
| Carex epapillosa | blackened sedge |
| Carex fuliginosa ssp. misandra | short-leaved sedge |
| Carex garberi ssp. bifaria | Garber`s sedge |
| Carex garberi ssp. garberi | Garber`s sedge |
| Carex glacialis | glacier sedge |
| Carex glareosa | lesser saltmarsh sedge |
| Carex glareosa var. amphigena | lesser saltmarsh sedge |
| Carex gmelinii | Gmelin`s sedge |
| Carex granularis | limestone meadow sedge |
| Carex haydeniana | Hayden`s sedge |
| Carex heleonastes | Hudson Bay sedge |
| Carex hoodii | Hood`s sedge |
| Carex hystericina | porcupine sedge |
| Carex infirminervia | weak-nerved sedge |
| Carex inops ssp. heliophila | long-stoloned sedge |
| Carex inops ssp. inops | long-stoloned sedge |
| Carex krausei | Krause`s sedge |
| Carex lachenalii | two-parted sedge |
| Carex lapponica | Lapland sedge |
| Carex lenticularis | lakeshore sedge |
| Carex lenticularis var. dolia | Enander's sedge |
| Carex lenticularis var. lenticularis | lakeshore sedge |
| Carex leptalea ssp. leptalea | bristle-stalked sedge |
| Carex leptalea ssp. pacifica | bristle-stalked sedge |
| Carex livida | pale sedge |
| Carex loliacea | ryegrass sedge |
| Carex luzulina | woodrush sedge |
| Carex macrochaeta | large-awned sedge |
| Carex media | Scandinavian sedge |
| Carex microchaeta ssp. microchaeta | small-awned sedge |
| Carex nigra | smooth black sedge |
| Carex pansa | sand-dune sedge |
| Carex paysonis | Payson`s sedge |
| Carex pedunculata | peduncled sedge |
| Carex pellita | woolly sedge |
| Carex praeceptorum | early sedge |
| Carex praticola | meadow sedge |
| Carex preslii | Presl`s sedge |
| Carex pyrenaica | Pyrenean sedge |
| Carex richardsonii | Richardson`s sedge |
| Carex saxatilis | russet sedge |
| Carex scirpoidea var. stenochlaena | single-spike sedge |
| Carex scopulorum | Holm`s Rocky Mountain sedge |
| Carex scopulorum var. bracteosa | Holm`s Rocky Mountain sedge |
| Carex simulata | short-beaked fen sedge |
| Carex supina ssp. spaniocarpa | spreading arctic sedge |
| Carex swanii | Swan`s sedge |
| Carex tahoensis | Tahoe sedge |
| Carex tribuloides | blunt broom sedge |
| Carex vallicola var. vallicola | valley sedge |
| Carthamus creticus | distaff thistle |
| Carthamus tinctorius | safflower |
| Cassiope lycopodioides | club-moss mountain-heather |
| Cassiope tetragona var. saximontana | four-angled mountain-heather |
| Castilleja gracillima | slender paintbrush |
| Catabrosa aquatica var. aquatica | water whorlgrass |
| Centaurea paniculata | jersey knapweed |
| Cerastium beeringianum ssp. earlei | Bering chickweed |
| Cerastium fischerianum | Fischer`s chickweed |
| Chenopodium album ssp. striatum | lamb`s-quarters |
| Chenopodium berlandieri | pitseed goosefoot |
| Chenopodium berlandieri var. zschackei | Zschac`s goosefoot |
| Chenopodium chenopodioides | low goosefoot |
| Chenopodium glaucum var. glaucum | oak-leaved goosefoot |
| Chenopodium hians | Hian`s goosefoot |
| Chenopodium macrospermum | large-seeded goosefoot |
| Chenopodium overi | Over`s goosefoot |
| Chenopodium pratericola | desert goosefoot |
| Chenopodium rubrum var. humile | red goosefoot |
| Chenopodium rubrum var. rubrum | red goosefoot |
| Chrysosplenium wrightii | Wright`s golden-saxifrage |
| Cicuta maculata var. maculata | spotted cowbane |
| Circaea alpina ssp. alpina | enchanter`s-nightshade |
| Claytonia exigua | pale springbeauty |
| Claytonia multiscapa ssp. pacifica | Rydberg's spring beauty |
| Claytonia perfoliata ssp. perfoliata | miner's-lettuce |
| Comandra umbellata var. californica | California comandra |
| Comandra umbellata var. pallida | pale comandra |
| Conringia orientalis | hare`s-ear mustard |
| Consolida ajacis | rocket larkspur |
| Corispermum hookeri | Hooker's bugseed |
| Corispermum pallasii | Pallas' bugseed |
| Corispermum villosum | hairy bugseed |
| Corrigiola litoralis | strapwort |
| Cotoneaster franchetii | orange cotoneaster |
| Cotoneaster lucidus | Shiny cotoneaster |
| Crassula aquatica | pigmyweed |
| Crataegus douglasii | black hawthorn |
| Crepis atribarba ssp. originalis | slender hawksbeard |
| Crepis modocensis ssp. modocensis | western low hawksbeard |
| Crepis nicaeensis | French hawksbeard |
| Crepis occidentalis | western hawksbeard |
| Crepis occidentalis ssp. conjucta | western hawksbeard |
| Crepis occidentalis ssp. pumila | western hawksbeard |
| Crepis vesicaria | weedy hawksbeard |
| Crepis vesicaria ssp. taraxacifolia | weedy hawksbeard |
| Crocosmia x crocosmiiflora | montbretia |
| Crypsis alopecuroides | foxtail pricklegrass |
| Cryptantha affinis | common cryptantha |
| Cryptantha watsonii | Watson`s cryptantha |
| Cryptogramma sitchensis | Sitka parsley fern |
| Cuscuta campestris | field dodder |
| Cuscuta cephalanthi | button-bush dodder |
| Cyperus esculentus | yellow nut-grass |
| Cyperus esculentus var. leptostachyus | yellow nut-grass |
| Cyperus strigosus | straw-coloured flatsedge |
| Danthonia unispicata | one-spike oatgrass |
| Daphne mezereum | February daphne |
| Deschampsia cespitosa ssp. beringensis | tufted hairgrass |
| Descurainia incana | Richardson`s tansy mustard |
| Descurainia incana ssp. incana | Richardson`s tansy mustard |
| Descurainia incana ssp. incisa | Richardson`s tansy mustard |
| Descurainia incana ssp. viscosa | Richardson`s tansy mustard |
| Descurainia nelsonii | Nelson`s tansymustard |
| Descurainia pinnata | western tansy mustard |
| Descurainia pinnata ssp. intermedia | western tansy mustard |
| Dichanthelium oligosanthes | Scribner`s witchgrass |
| Dieteria canescens | hoary aster |
| Digitaria sanguinalis | hairy crabgrass |
| Diplotaxis tenuifolia | slime-leaf wallrocket |
| Distichlis spicata var. stricta | alkali saltgrass |
| Dodecatheon conjugens ssp. viscidum | slimpod |
| Douglasia gormanii | Gorman`s douglasia |
| Downingia elegans | common downingia |
| Draba albertina | slender draba |
| Draba corymbosa | Baffin Bay draba |
| Draba fladnizensis | Austrian draba |
| Draba hyperborea | North Pacific draba |
| Draba lonchocarpa | lance-fruited draba |
| Draba lonchocarpa var. thompsonii | lance-fruited draba |
| Draba longipes | long-stalked draba |
| Draba macounii | Macoun`s draba |
| Draba palanderiana | Palander`s draba |
| Draba paysonii | Payson`s draba |
| Draba ruaxes | coast mountain draba |
| Draba stenopetala | star-flowered draba |
| Draba ventosa | Wind River draba |
| Dracocephalum thymiflorum | Eurasian dragonhead |
| Drosera x obovata | hybrid sundew |
| Dryas drummondii var. drummondii | yellow mountain-avens |
| Dryas drummondii var. tomentosa | yellow mountain-avens |
| Dryas integrifolia ssp. sylvatica | entire-leaved mountain-avens |
| Dryas octopetala ssp. alaskensis | white mountain-avens |
| Dryas octopetala ssp. octopetala | white mountain-avens |
| Dryopteris marginalis | marginal wood fern |
| Echinochloa muricata | rough barnyardgrass |
| Echinochloa muricata var. microstachya | rough barnyardgrass |
| Egeria densa | Brazilian waterweed |
| Elatine brachysperma | short-seeded waterwort |
| Elatine rubella | three-flowered waterwort |
| Eleocharis coloradoensis | Dwarf spike-rush |
| Eleocharis erythropoda | bald spike-rush |
| Eleocharis geniculata | Bent spikerush |
| Eleocharis kamtschatica | Kamchatka spike-rush |
| Eleocharis macrostachya | pale spike-rush |
| Eleocharis suksdorfiana | Suksdorf's spike-rush |
| Eleocharis uniglumis | slender spike-rush |
| Elodea nuttallii | Nuttall`s waterweed |
| Elymus elymoides | squirreltail grass |
| Elymus elymoides ssp. elymoides | squirreltail grass |
| Elymus glaucus ssp. virescens | blue wildrye |
| Elymus lanceolatus ssp. lanceolatus | thickspike wildrye |
| Elymus lanceolatus ssp. psammophilus | sand-dune wheatgrass |
| Elymus trachycaulus | slender wheatgrass |
| Elymus trachycaulus ssp. subsecundus | slender wheatgrass |
| Elymus x saundersii | Saunder's wildrye |
| Enemion savilei | Queen Charlotte false rue-anemone |
| Epilobium ciliatum ssp. glandulosum | purple-leaved willowherb |
| Epilobium ciliatum ssp. watsonii | purple-leaved willowherb |
| Epilobium davuricum | northern swamp willowherb |
| Epilobium hornemannii ssp. behringianum | Hornemann`s willowherb |
| Epilobium hornemannii ssp. hornemannii | Hornemann`s willowherb |
| Epilobium montanum | toothed willow-herb |
| Epilobium obscurum | obscure willowherb |
| Epilobium oregonense | Oregon willowherb |
| Epilobium tetragonum ssp. tetragonum | square-stemmed willow-herb |
| Equisetum variegatum ssp. alaskanum | northern scouring-rush |
| Eragrostis mexicana ssp. virescens | Orcutt`s lovegrass |
| Eragrostis multicaulis | duo gan hua mei cao |
| Eragrostis pilosa | India lovegrass |
| Eremopyrum orientale | Oriental false wheatgrass |
| Eremopyrum triticeum | annual wheatgrass |
| Erigeron acris var. kamtschaticus | bitter fleabane |
| Erigeron glabellus ssp. pubescens | smooth daisy |
| Erigeron lanatus | woolly daisy |
| Erigeron leibergii | Leiberg`s fleabane |
| Erigeron trifidus | three-lobed daisy |
| Eriogonum heracleoides | parsnip-flowered buckwheat |
| Eriogonum pyrolifolium var. coryphaeum | alpine buckwheat |
| Eriogonum strictum var. proliferum | strict buckwheat |
| Eriogonum umbellatum | sulphur buckwheat |
| Eriophorum brachyantherum | short-anthered cotton-grass |
| Eriophorum chamissonis var. albidum | Chamisso`s cotton-grass |
| Eriophorum chamissonis var. chamissonis | Chamisso`s cotton-grass |
| Eriophorum vaginatum ssp. vaginatum | sheathed cotton-grass |
| Eriophorum virginicum | tawny cotton-grass |
| Eryngium planum | plains eryngo |
| Erysimum arenicola | sand-dwelling wallflower |
| Euphorbia lathyris | caper spurge |
| Eurybia radulina | rough-leaved aster |
| Eutrema salsugineum | saltwater cress |
| Festuca altaica | Altai fescue |
| Festuca baffinensis | Baffin fescue |
| Festuca filiformis | hair fescue |
| Festuca heterophylla | various-leaved fescue |
| Festuca idahoensis | Idaho fescue |
| Festuca minutiflora | little fescue |
| Festuca viridula | green fescue |
| Festuca viviparoidea | viviparous fescue |
| Festuca washingtonica | Washington fescue |
| Fragaria chiloensis | coastal strawberry |
| Galium anglicum | Lamarck's bedstraw |
| Galium kamtschaticum | boreal bedstraw |
| Galium spurium | false cleavers |
| Galium trifidum ssp. columbianum | small bedstraw |
| Galium trifidum ssp. trifidum | small bedstraw |
| Gayophytum racemosum | racemed groundsmoke |
| Gayophytum ramosissimum | hairstem groundsmoke |
| Geum macrophyllum | large-leaved avens |
| Geum schofieldii | Queen Charlotte avens |
| Glaux maritima ssp. obtusifolia | sea-milkwort |
| Glyceria canadensis | rattlesnake-grass |
| Glyceria declinata | waxy mannagrass |
| Glyceria fluitans | floating sweet-grass |
| Glyceria leptostachya | slender-spiked mannagrass |
| Glyceria x occidentalis | western mannagrass |
| Grindelia hirsutula var. hirsutula | hairy gumweed |
| Grindelia squarrosa var. quasiperennis | curly-cup gumweed |
| Grindelia squarrosa var. serrulata | curly-cup gumweed |
| Grindelia squarrosa var. squarrosa | curly-cup gumweed |
| Gymnocarpium jessoense ssp. parvulum | Nahanni oak fern |
| Gypsophila scorzonerifolia | glandular baby`s breath |
| Hackelia diffusa | spreading stickseed |
| Hackelia diffusa var. diffusa | spreading stickseed |
| Hedeoma hispida | mock-pennyroyal |
| Hedysarum boreale ssp. boreale | northern hedysarum |
| Helianthus maximiliani | Maximilian sunflower |
| Helianthus rigidus var. subrhomboideus | rigid sunflower |
| Helianthus tuberosus | Jerusalem artichoke |
| Hesperostipa comata | needle-and-thread grass |
| Hesperostipa spartea | porcupinegrass |
| Heterotheca villosa var. minor | golden-aster |
| Heuchera cylindrica var. glabella | round-leaved alumroot |
| Heuchera cylindrica var. orbicularis | round-leaved alumroot |
| Heuchera cylindrica var. septentrionalis | round-leaved alumroot |
| Hieracium canadense | Canadian hawkweed |
| Hieracium cynoglossoides | hounds-tongue hawkweed |
| Hieracium flagellare ssp. flagellare | flagellate hawkweed |
| Hieracium glomeratum | queen-devil hawkweed |
| Hieracium laevigatum | smooth hawkweed |
| Hieracium sabaudum | European king devil |
| Hierochloe hirta | northern sweetgrass |
| Hippuris tetraphylla | four-leaved mare`s-tail |
| Holcus mollis | creeping softgrass |
| Hordeum jubatum ssp. intermedium | foxtail barley |
| Hordeum jubatum ssp. jubatum | foxtail barley |
| Hordeum marinum ssp. gussonianum | Mediterranean barley |
| Hordeum murinum ssp. glaucum | seagreen barley |
| Hordeum murinum ssp. leporinum | charming barley |
| Hordeum murinum ssp. murinum | wall barley |
| Hordeum vulgare | common barley |
| Hyacinthoides non-scripta | English-bluebell |
| Hypericum androsaemum | tutsan |
| Hypericum boreale | northern bog St. John`s-wort |
| Hypericum maculatum | spotted St. John`s-wort |
| Hypericum maculatum ssp. obtusiusculum | spotted St. John`s-wort |
| Hypericum mutilum | small Canadian St. John`s-wort |
| Iberis umbellata | candytuft |
| Impatiens ecalcarata | spurless touch-me-not |
| Isoetes occidentalis | western quillwort |
| Isolepis setacea | bristle clubrush |
| Juncus anthelatus | giant path rush |
| Juncus biglumis | two-flowered rush |
| Juncus brevicaudatus | short-tailed rush |
| Juncus breweri | Brewer`s rush |
| Juncus bulbosus | bulbous rush |
| Juncus compressus | compressed rush |
| Juncus confusus | Colorado rush |
| Juncus conglomeratus | compact rush |
| Juncus drummondii var. drummondii | Drummond`s rush |
| Juncus drummondii var. subtriflorus | Drummond`s rush |
| Juncus effusus ssp. effusus | common rush |
| Juncus effusus ssp. pacificus | Pacific soft rush |
| Juncus effusus ssp. solutus | soft rush |
| Juncus ensifolius var. ensifolius | dagger-leaf rush |
| Juncus ensifolius var. montanus | dagger-leaf rush |
| Juncus haenkei | Haenke's rush |
| Juncus hesperius | common rush |
| Juncus laccatus | shiny rush |
| Juncus longistylis | long-styled rush |
| Juncus marginatus | grass-leaf rush |
| Juncus nevadensis | Sierra rush |
| Juncus oxymeris | pointed rush |
| Juncus parryi | Parry`s rush |
| Juncus pelocarpus | brown-fruit rush |
| Juncus pylaei | Pylae rush |
| Juncus regelii | Regel`s rush |
| Juncus tracyi | Tracy's rush |
| Kobresia sibirica | Siberian kobresia |
| Krigia virginica | Virginia dwarf dandelion |
| Lactuca ludoviciana | western lettuce |
| Lamium purpureum | purple dead-nettle |
| Lappula occidentalis var. occidentalis | western stickseed |
| Lathrocasis tenerrima | slender gilia |
| Lathyrus japonicus | beach pea |
| Lathyrus nevadensis var. pilosellus | purple peavine |
| Leersia oryzoides | rice cutgrass |
| Lemna minuta | least duckweed |
| Lepidium densiflorum var. densiflorum | prairie pepper-grass |
| Lepidium densiflorum var. elongatum | prairie pepper-grass |
| Lepidium densiflorum var. macrocarpum | prairie pepper-grass |
| Lepidium densiflorum var. pubicarpum | prairie pepper-grass |
| Lepidium oxycarpum | forked pepperweed |
| Lepidium ramosissimum | branched pepper-grass |
| Lepidium sativum | garden cress |
| Lepidium virginicum var. menziesii | Menzie's pepperweed |
| Leymus x vancouverensis | hybrid wildrye |
| Ligusticum calderi | Calder`s lovage |
| Ligusticum scoticum ssp. hultenii | beach lovage |
| Lilaea scilloides | flowering quillwort |
| Lindernia dubia | false-pimpernel |
| Linnaea borealis ssp. borealis | twinflower |
| Linum usitatissimum | common flax |
| Lithophragma tenellum | slender fringecup |
| Lithospermum arvense | corn gromwell |
| Lloydia serotina | alp lily |
| Lloydia serotina var. flava | alp lily |
| Lolium temulentum | bearded ryegrass |
| Lomatium triternatum ssp. platycarpum | nine-leaved desert-parsley |
| Lonicera periclymenum | European honeysuckle |
| Lotus krylovii | Krylov's trefoil |
| Lupinus arbustus | longspur lupine |
| Lupinus arbustus ssp. neolaxiflorus | spurred lupine |
| Lupinus arbustus ssp. pseudoparviflorus | Montana lupine |
| Lupinus arcticus ssp. arcticus | arctic lupine |
| Lupinus argenteus | silvery lupine |
| Lupinus kuschei | Yukon lupine |
| Lupinus leucophyllus | velvet lupine |
| Lupinus oreganus var. kincaidii | Kincaid`s lupine |
| Luzula arcuata ssp. unalaschcensis | curved wood-rush |
| Luzula campestris | field wood-rush |
| Luzula comosa var. laxa | Pacific wood-rush |
| Luzula groenlandica | Greenland wood-rush |
| Luzula hitchcockii | Hitchcock`s wood-rush |
| Luzula kjellmaniana | Kjellman`s wood-rush |
| Luzula multiflora ssp. frigida | many-flowered wood-rush |
| Luzula multiflora ssp. multiflora | many-flowered wood-rush |
| Luzula nivalis | arctic wood-rush |
| Luzula rufescens | rusty wood-rush |
| Lycopodium clavatum var. clavatum | running club-moss |
| Lythrum hyssopifolia | Hyssop loosestrife |
| Malva parviflora | small-flowered mallow |
| Medicago polymorpha | bur-clover |
| Megalodonta beckii | water marigold |
| Melica bulbosa | oniongrass |
| Mentha suaveolens | applemint |
| Mentha x gracilis | red mint |
| Mentha x piperita | peppermint |
| Mentha x verticillata | whorled mint |
| Mentha x villosa | foxtail mint |
| Mentzelia dispersa | bushy mentzelia |
| Mertensia paniculata var. paniculata | tall bluebells |
| Micranthes nelsoniana var. pacifica | dotted saxifrage |
| Micranthes razshivinii | large-petalled saxifrage |
| Micranthes tischii | Tisch's saxifrage |
| Microgilia minutiflora | small-flowered ipomopsis |
| Minuartia arctica | Arctic sandwort |
| Minuartia elegans | northern sandwort |
| Minuartia pusilla | dwarf sandwort |
| Mirabilis nyctaginea | umbrellawort |
| Monarda fistulosa var. mollis | wild bergamot |
| Montia bostockii | Bostock`s montia |
| Montia diffusa | branching montia |
| Muhlenbergia asperifolia | alkali muhly |
| Muhlenbergia mexicana | wirestem muhly |
| Muhlenbergia racemosa | satin grass |
| Muhlenbergia richardsonis | mat muhly |
| Muhlenbergia uniflora | bog muhly |
| Myriophyllum farwellii | Farwell`s water-milfoil |
| Myriophyllum heterophyllum | twoleaf watermilfoil |
| Myriophyllum hippuroides | western water-milfoil |
| Myriophyllum pinnatum | green parrot`s-feather |
| Myriophyllum quitense | waterwort water-milfoil |
| Myrrhis odorata | sweet cicely |
| Navarretia divaricata var. divaricata | mountain navarretia |
| Nymphaea alba | European white waterlily |
| Nymphaea leibergii | small white waterlily |
| Oenothera perennis | perennial sundrops |
| Oenothera villosa ssp. strigosa | yellow evening-primrose |
| Oenothera villosa ssp. villosa | hairy evening-primrose |
| Omalotheca sylvatica | woodland cudweed |
| Oxypolis occidentalis | western cowbane |
| Oxytropis campestris var. cusickii | field locoweed |
| Oxytropis campestris var. davisii | Davis' oxytrope |
| Oxytropis campestris var. varians | field locoweed |
| Oxytropis deflexa var. foliolosa | foliose oxytrope |
| Oxytropis deflexa var. sericea | silky oxytrope |
| Oxytropis huddelsonii | Huddelson`s locoweed |
| Oxytropis sericea var. speciosa | white locoweed |
| Packera ogotorukensis | Ogotoruk Creek butterweed |
| Panicum miliaceum | broom-corn millet |
| Panicum rigidulum ssp. rigidulum | redtop panicgrass |
| Papaver dubium | blind eyes |
| Papaver lapponicum | Macoun`s poppy |
| Papaver pygmaeum | dwarf poppy |
| Parthenocissus vitacea | woodbine |
| Pascopyrum smithii | western bluegrass |
| Pectocarya penicillata | winged combseed |
| Pedicularis bracteosa var. latifolia | bracted lousewort |
| Penstemon richardsonii var. richardsonii | Richardson`s penstemon |
| Pentaglottis sempervirens | green alkanet |
| Persicaria amphibia var. emersa | swamp smartweed |
| Persicaria lapathifolia | willow weed |
| Persicaria nepalensis | Nepalese knotweed |
| Persicaria orientalis | kiss-me-over-the-garden-gate |
| Petrorhagia prolifera | prolific petrorhagia |
| Petrorhagia saxifraga | tunic flower |
| Phacelia franklinii | Franklin`s phacelia |
| Phalaris canariensis | canarygrass |
| Phippsia algida | icegrass |
| Physalis philadelphica | Tomatillo |
| Piptatherum canadense | Canada mountain-ricegrass |
| Plantago canescens | arctic plantain |
| Plantago psyllium | whorled plantain |
| Platanthera dilatata var. albiflora | fragrant white rein orchid |
| Poa arctica | arctic bluegrass |
| Poa arctica ssp. arctica | arctic bluegrass |
| Poa arctica ssp. lanata | arctic bluegrass |
| Poa bulbosa | bulbous bluegrass |
| Poa cusickii | Cusick`s bluegrass |
| Poa cusickii ssp. epilis | Cusick`s bluegrass |
| Poa cusickii ssp. pallida | Cusick`s bluegrass |
| Poa eminens | eminent bluegrass |
| Poa fendleriana | mutton grass |
| Poa fendleriana ssp. longiligula | mutton grass |
| Poa glauca ssp. glauca | glaucous bluegrass |
| Poa glauca ssp. rupicola | glaucous bluegrass |
| Poa howellii | Howell`s bluegrass |
| Poa infirma | diploid annual bluegrass |
| Poa laxa ssp. banffiana | Banff bluegrass |
| Poa laxiflora | lax-flowered bluegrass |
| Poa leptocoma | bog bluegrass |
| Poa lettermanii | Letterman`s bluegrass |
| Poa marcida | weeping bluegrass |
| Poa nemoralis | wood bluegrass |
| Poa nervosa | coastal bluegrass |
| Poa pratensis ssp. agassizensis | Kentucky bluegrass |
| Poa pratensis ssp. alpigena | Kentucky bluegrass |
| Poa pratensis ssp. angustifolia | Kentucky bluegrass |
| Poa pratensis ssp. colpodea | Kentucky bluegrass |
| Poa pratensis ssp. irrigata | Kentucky bluegrass |
| Poa pratensis ssp. pratensis | Kentucky bluegrass |
| Poa pseudoabbreviata | polar bluegrass |
| Poa secunda ssp. juncifolia | Nevada bluegrass |
| Poa stenantha var. stenantha | narrow-flowered bluegrass |
| Poa suksdorfii | western bluegrass |
| Poa supina | supine bluegrass |
| Polycnemum arvense | crunch weed |
| Polygonum arenastrum | oval-leaved knotweed |
| Polygonum buxiforme | eastern knotweed |
| Polygonum engelmannii | Engelmann's knotweed |
| Polygonum nuttallii | Nuttall's knotweed |
| Polygonum polygaloides | milkwort knotweed |
| Polygonum sawatchense | Sawatch knotweed |
| Polygonum sawatchense ssp. oblivium | Sawatch knotweed |
| Polypodium sibiricum | Siberian polypody |
| Polypogon interruptus | ditch rabbit's-foot grass |
| Populus balsamifera ssp. balsamifera | balsam poplar |
| Populus deltoides ssp. deltoides | eastern cottonwood |
| Populus deltoides ssp. monilifera | eastern cottonwood |
| Potamogeton foliosus | closed-leaved pondweed |
| Potamogeton friesii | flat-stalked pondweed |
| Potamogeton illinoensis | Illinois pondweed |
| Potamogeton nodosus | long-leaved pondweed |
| Potamogeton perfoliatus | perfoliate pondweed |
| Potamogeton pusillus | small pondweed |
| Potamogeton pusillus ssp. pusillus | small pondweed |
| Potamogeton pusillus ssp. tenuissimus | small pondweed |
| Potamogeton zosteriformis | eel-grass pondweed |
| Potentilla diversifolia var. perdissecta | diverse-leaved cinquefoil |
| Potentilla glandulosa | sticky cinquefoil |
| Potentilla gracilis var. flabelliformis | graceful cinquefoil |
| Potentilla nivea var. nivea | snow cinquefoil |
| Potentilla ovina var. ovina | sheep cinquefoil |
| Potentilla pulcherrima | pretty cinquefoil |
| Prenanthes sagittata | arrow-leaved rattlesnake-root |
| Prunella vulgaris ssp. vulgaris | self-heal |
| Prunus mahaleb | Mahaleb cherry |
| Prunus virginiana ssp. demissa | choke cherry |
| Prunus x pugetensis | hybrid cherry |
| Pseudoroegneria spicata ssp. inermis | bluebunch wheatgrass |
| Pseudoroegneria spicata ssp. spicata | bluebunch wheatgrass |
| Pteridium aquilinum ssp. lanuginosum | bracken fern |
| Pteridium aquilinum ssp. latiusculum | bracken fern |
| Pyracantha coccinea | scarlet firethorn |
| Ranunculus aquatilis var. aquatilis | white water-buttercup |
| Ranunculus aquatilis var. diffusus | white water-buttercup |
| Ranunculus flammula var. reptans | lesser spearwort |
| Ranunculus grayi | arctic buttercup |
| Ranunculus hyperboreus | far-northern buttercup |
| Ranunculus orthorhynchus var. platyphyllus | straight-beaked buttercup |
| Ranunculus sardous | hairy buttercup |
| Ranunculus sceleratus var. sceleratus | cursed buttercup |
| Ranunculus sulphureus | sulphur buttercup |
| Reseda alba | white mignonette |
| Rhynchospora capillacea | brown beak-rush |
| Ribes aureum | golden currant |
| Ribes aureum var. villosum | Golden currant, Buffalo currant |
| Ribes oxyacanthoides ssp. oxyacanthoides | northern gooseberry |
| Ribes rubrum | red currant |
| Rorippa barbareifolia | hoary yellow cress |
| Rorippa curvipes | bluntleaf yellowcress |
| Rorippa curvipes var. curvipes | blunt-leaved yellowcress |
| Rorippa microphylla | one-rowed water cress |
| Rorippa palustris ssp. hispida | Hispid yellow cress |
| Rorippa sylvestris | creeping yellow cress |
| Rotala ramosior | toothcup meadow-foam |
| Rubus arcticus ssp. stellatus | nagoonberry |
| Rubus phoenicolasius | Japanese wineberry, Wine raspberry |
| Rubus vestitus | European blackberry |
| Rudbeckia laciniata | tall coneflower |
| Rudbeckia laciniata var. ampla | tall coneflower |
| Rumex acetosa ssp. acetosa | green sorrel |
| Rumex britannica | greater water dock |
| Rumex longifolius | long-leaved dock |
| Rumex patientia | patience dock |
| Rumex paucifolius | alpine sorrel |
| Rumex sanguineus | red-veined dock |
| Sagina maxima | coastal pearlwort |
| Sagina nivalis | snow pearlwort |
| Salix alaxensis var. alaxensis | Alaska willow |
| Salix alba | white willow |
| Salix alba var. vitellina | white willow |
| Salix barclayi | Barclay`s willow |
| Salix boothii | Booth`s willow |
| Salix exigua ssp. interior | narrow-leaf willow |
| Salix glauca var. acutifolia | grey-leaved willow |
| Salix lemmonii | Lemmon`s willow |
| Salix niphoclada | barren-ground willow |
| Salix pentandra | laurel willow |
| Salix petrophila | Rocky Mountain willow |
| Salix pulchra | diamond-leaved willow |
| Salix raupii | Raup`s willow |
| Salix reticulata ssp. reticulata | net-veined willow |
| Salix richardsonii | Richardson`s willow |
| Salix setchelliana | Setchell`s willow |
| Salix stolonifera | creeping willow |
| Salix x rubens | hybrid white willow |
| Salvia nemorosa | wood sage |
| Sambucus racemosa var. leucocarpa | eastern red elderberry |
| Sanguisorba annua | western burnet |
| Saxifraga serpyllifolia | thyme-leaved saxifrage |
| Saxifraga tridactylites | rue-leaved saxifrage |
| Scandix pecten-veneris | Venus` comb |
| Schedonnardus paniculatus | Tumblegrass |
| Schoenoplectus americanus | Olney`s bulrush |
| Schoenoplectus pungens var. longispicatus | American bulrush |
| Schoenoplectus saximontanus | Rocky Mountain clubrush |
| Schoenoplectus triqueter | streambank clubrush |
| Scirpus georgianus | Georgia bulrush |
| Sclerochloa dura | hardgrass |
| Scrophularia lanceolata | lance-leaved figwort |
| Scutellaria angustifolia | narrow-leaved skullcap |
| Secale cereale | rye |
| Sedum lanceolatum var. nesioticum | lance-leaved stonecrop |
| Sedum spathulifolium var. pruinosum | broad-leaved stonecrop |
| Sedum spathulifolium var. spathulifolium | broad-leaved stonecrop |
| Selaginella oregana | Oregon selaginella |
| Selaginella sibirica | northern selaginella |
| Selaginella standleyi | Standley`s selaginella |
| Senecio elmeri | Elmer`s butterweed |
| Senecio hydrophilus | alkali-marsh butterweed |
| Senecio megacephalus | large-headed groundsel |
| Senecio sheldonensis | Mount Sheldon butterweed |
| Setaria faberi | Chinese foxtail |
| Setaria italica | foxtail millet |
| Setaria verticillata | bur bristlegrass |
| Shepherdia argentea | silver buffaloberry |
| Silene acaulis | moss campion |
| Silene dichotoma | forked catchfly |
| Silene menziesii var. menziesii | Menzies` campion |
| Silene menziesii var. viscosa | Menzies` campion |
| Silene ostenfeldii | Taimyr campion |
| Silene scouleri | Scouler`s campion |
| Silene scouleri ssp. scouleri | Scouler`s campion |
| Sisymbrium orientale | eastern tumble-mustard |
| Sisyrinchium idahoense var. segetum | Idaho blue-eyed-grass |
| Solanum nigrum | black nightshade |
| Solanum nigrum ssp. schultesii | black nightshade |
| Solanum triflorum | cut-leaved nightshade |
| Solidago canadensis | Canada goldenrod |
| Solidago elongata | west coast goldenrod |
| Solidago lepida | Canada goldenrod |
| Solidago missouriensis | Missouri goldenrod |
| Solidago nemoralis ssp. decemflora | field goldenrod |
| Sonchus arvensis ssp. arvensis | perennial sow-thistle |
| Sonchus arvensis ssp. uliginosus | perennial sow-thistle |
| Sorbus sitchensis var. sitchensis | Sitka mountain-ash |
| Sorghum bicolor ssp. bicolor | Grain sorghum |
| Sparganium fluctuans | water bur-reed |
| Spergularia rupicola | cliff sand-spurrey |
| Sphenopholis intermedia | slender wedgegrass |
| Sphenopholis obtusata | prairie wedgegrass |
| Sporobolus airoides | hairgrass dropseed |
| Sporobolus cryptandrus | sand dropseed |
| Sporobolus vaginiflorus ssp. vaginiflorus | poverty grass |
| Stachys arvensis | field hedge-nettle |
| Stachys byzantina | lamb`s-ear |
| Stellaria alsine | bog starwort |
| Stellaria borealis ssp. borealis | boreal starwort |
| Stellaria borealis ssp. sitchana | boreal starwort |
| Stellaria crassifolia | thick-leaved starwort |
| Stellaria longipes var. longipes | long-stalked starwort |
| Stellaria obtusa | blunt-sepaled starwort |
| Stellaria pallida | lesser chickweed |
| Stuckenia filiformis ssp. filiformis | slender-leaved pondweed |
| Stuckenia filiformis ssp. occidentalis | slender-leaved pondweed |
| Stuckenia vaginata | sheathing pondweed |
| Subularia aquatica ssp. americana | awlwort |
| Swertia perennis | alpine bog swertia |
| Symphoricarpos albus var. albus | common snowberry |
| Symphoricarpos oreophilus | mountain snowberry |
| Symphoricarpos oreophilus var. utahensis | mountain snowberry |
| Symphyotrichum foliaceum var. apricum | alpine leafybract aster |
| Symphyotrichum foliaceum var. parryi | Parry's aster |
| Symphyotrichum laeve | smooth aster |
| Symphyotrichum laeve var. geyeri | smooth aster |
| Symphyotrichum spathulatum | western mountain aster |
| Symphyotrichum spathulatum var. intermedium | western mountain aster |
| Symphyotrichum spathulatum var. spathulatum | western mountain aster |
| Symphytum asperum | rough comfrey |
| Taraxacum hyparcticum | High-Arctic dandelion |
| Torilis arvensis | spreading hedge-parsley |
| Torreyochloa pallida | Fernald`s false manna |
| Triadenum fraseri | Fraser`s St. John`s-wort |
| Triantha occidentalis ssp. brevistyla | western false asphodel |
| Triantha occidentalis ssp. montana | western false asphodel |
| Trifolium dichotomum | Macrae`s clover |
| Trifolium glomeratum | clustered clover |
| Triglochin debilis | Slender arrowgrass |
| Trisetum cernuum | nodding trisetum |
| Triticum aestivum | wheat |
| Ulmus pumila | Siberian elm |
| Urtica urens | dog nettle |
| Utricularia gibba | humped bladderwort |
| Utricularia ochroleuca | ochroleucous bladderwort |
| Vaccaria pyramidata | cow-basil |
| Vaccinium globulare | blue huckleberry |
| Vaccinium uliginosum ssp. occidentale | bog blueberry |
| Vaccinium uliginosum ssp. pubescens | bog blueberry |
| Vaccinium vitis-idaea | lignonberry |
| Valeriana dioica ssp. sylvatica | marsh valerian |
| Verbascum phlomoides | woolly mullein |
| Veronica biloba | bilobed speedwell |
| Veronica catenata | pink water speedwell |
| Veronica peregrina var. peregrina | purslane speedwell |
| Veronica serpyllifolia var. serpyllifolia | thyme-leaved speedwell |
| Viburnum opulus var. opulus | European cranberrybush |
| Viola nephrophylla var. cognata | northern bog violet |
| Viola praemorsa | yellow montaine violet |
| Viola purpurea | purple-marked yellow violet |
| Wolffia borealis | northern water-meal |
| x Elyhordeum macounii | Macoun's wildrye |
| Zannichellia palustris | horned pondweed |
| Zigadenus venenosus var. gramineus | meadow death-camas |
| Zigadenus venenosus var. venenosus | meadow death-camas |
| Zizania aquatica | wild rice |
| Zostera americana | dwarf eelgrass |