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Balsaminaceae

• Impatiens aurella — pale-yellow jewelweed
• Impatiens capensis — spotted jewelweed
• Impatiens ecalcarata — spurless touch-me-not

• Impatiens noli-tangere — western jewelweed
• Impatiens pallida — pale jewelweed

Bartramiaceae

• Anacolia menziesii
• Bartramia halleriana
• Bartramia ithyphylla
• Bartramia pomiformis
• Bartramia stricta
• Conostomum tetragonum

• Philonotis capillaris
• Philonotis fontana — philonotis moss
• Philonotis marchica
• Philonotis yezoana
• Plagiopus oederiana

Berberidaceae

• Achlys californica — California deer's-foot
• Achlys triphylla — three-leaf deer's-foot
• Caulophyllum giganteum — giant blue cohosh
• Caulophyllum thalictroides — blue cohosh
• Jeffersonia diphylla — twinleaf

• Mahonia aquifolium — Piper's Oregon-grape
• Mahonia nervosa — longleaf Oregon-grape
• Mahonia repens — creeping Oregon-grape
• Podophyllum peltatum — mayapple

Betulaceae

• Alnus incana — speckled alder
• Alnus rubra — red alder
• Alnus serrulata — brookside alder
• Alnus viridis — green alder
• Betula alleghaniensis — yellow birch
• Betula borealis — northern birch
• Betula lenta — sweet birch
• Betula minor — dwarf white birch
• Betula nana — dwarf swamp birch
• Betula neoalaskana — Alaska paper birch
• Betula occidentalis — spring birch
• Betula papyrifera — paper birch
• Betula populifolia — grey birch
• Betula pumila — swamp birch
• Betula x caerulea

• Betula x dutillyi
• Betula x eastwoodiae
• Betula x hornei
• Betula x neoborealis
• Betula x purpusii
• Betula x raymundii
• Betula x sandbergii — Sandberg's birch
• Betula x sargentii
• Betula x uliginosa
• Betula x utahensis
• Betula x winteri
• Carpinus caroliniana — American hornbeam
• Corylus americana — American hazelnut
• Corylus cornuta — beaked hazelnut
• Ostrya virginiana — eastern hop-hornbeam

Bignoniaceae

• Campsis radicans — trumpet-creeper

Blasiaceae

• Blasia pusilla

Blechnaceae

• Blechnum spicant — deer fern
• Woodwardia areolata — netted chainfern

• Woodwardia fimbriata — giant chainfern
• Woodwardia virginica — Virginia chainfern

Boraginaceae

• Amsinckia intermedia — Rancher's fiddleneck
• Amsinckia lycopsoides — bugloss fiddleneck
• Amsinckia menziesii — smallflower fiddleneck
• Amsinckia retrorsa — rough fiddleneck
• Amsinckia spectabilis — seaside fiddleneck
• Amsinckia tessellata — tessellate fiddleneck
• Cryptantha affinis — slender cat's-eye
• Cryptantha ambigua — obscure cat's-eye
• Cryptantha celosioides — cockscomb cat's-eye
• Cryptantha fendleri — Fendler's cat's-eye
• Cryptantha flaccida — weakstem cat's-eye
• Cryptantha kelseyana — Kelsey's cat's-eye
• Cryptantha minima — little cat's-eye
• Cryptantha torreyana — Torrey's cat's-eye
• Cryptantha watsonii — Watson's cat's-eye
• Cynoglossum virginianum — northern wild comfrey
• Eritrichium nanum — arctic forget-me-not
• Eritrichium splendens — showy forget-me-not
• Hackelia ciliata — Okanogan stickseed
• Hackelia deflexa — northern stickseed
• Hackelia diffusa — spreading stickseed
• Hackelia floribunda — Davis Mountain stickseed
• Hackelia micrantha — blue stickseed

• Hackelia virginiana — Virginia stickseed
• Heliotropium curassavicum — seaside heliotrope
• Lappula occidentalis — flatspine sheepburr
• Lithospermum canescens — hoary puccoon
• Lithospermum caroliniense — golden puccoon
• Lithospermum incisum — narrow-leaved puccoon
• Lithospermum latifolium — American gromwell
• Lithospermum ruderale — western gromwell
• Mertensia drummondii — Drummond's bluebells
• Mertensia lanceolata — prairie bluebells
• Mertensia longiflora — longflower bluebells
• Mertensia maritima — sea bluebells
• Mertensia paniculata — tall bluebells
• Mertensia virginica — Virginia bluebells
• Myosotis asiatica — Asian forget-me-not
• Myosotis laxa — small forget-me-not
• Myosotis macrosperma — largeseed forget-me-not
• Myosotis verna — spring forget-me-not
• Onosmodium molle — soft-hairy false gromwell
• Pectocarya penicillata — shortleaf combseed
• Plagiobothrys figuratus — rough popcorn-flower
• Plagiobothrys scouleri — meadow popcorn-flower
• Plagiobothrys tenellus — Pacific popcorn-flower

Brachytheciaceae

• Brachythecium acuminatum
• Brachythecium acutum
• Brachythecium albicans
• Brachythecium biventrosum
• Brachythecium calcareum
• Brachythecium campestre
• Brachythecium collinum
• Brachythecium digastrum
• Brachythecium erythrorrhizon
• Brachythecium frigidum
• Brachythecium glaciale
• Brachythecium groenlandicum
• Brachythecium holzingeri
• Brachythecium hylotapetum
• Brachythecium leibergii
• Brachythecium mildeanum
• Brachythecium nelsonii
• Brachythecium oedipodium
• Brachythecium oxycladon
• Brachythecium plumosum
• Brachythecium populeum — matted feather moss
• Brachythecium reflexum — cedar moss
• Brachythecium rivulare — waterside feather moss
• Brachythecium rotaeanum — Rota's feather moss
• Brachythecium rutabulum
• Brachythecium salebrosum
• Brachythecium starkei
• Brachythecium trachypodium
• Brachythecium turgidum
• Brachythecium velutinum

• Bryhnia graminicolor
• Bryhnia hultenii
• Bryhnia novae-angliae — New England bryhnia moss
• Bryoandersonia illecebra
• Cirriphyllum cirrosum
• Cirriphyllum piliferum
• Eurhynchium hians
• Eurhynchium oreganum — Oregon beaked moss
• Eurhynchium praelongum
• Eurhynchium pulchellum
• Homalothecium aeneum
• Homalothecium arenarium
• Homalothecium fulgescens
• Homalothecium nevadense
• Homalothecium nuttallii
• Homalothecium pinnatifidum
• Homalothecium sericeum
• Isothecium alopecuroides
• Isothecium cristatum
• Isothecium myosuroides
• Platyhypnidium riparioides
• Pseudoscleropodium purum
• Scleropodium cespitans
• Scleropodium obtusifolium
• Scleropodium touretii
• Steerecleus serrulatus — steerecleus moss
• Tomentypnum falcifolium
• Tomentypnum nitens
• Trachybryum megaptilum

Brassicaceae

• Alyssum obovatum — American alyssum
• Aphragmus eschscholtzianus — Aleutian-cress
• Arabidopsis salsuginea — saltwater cress
• Arabis alpina — alpine rockcress
• Arabis arenicola — arctic rockcress
• Arabis boivinii — Boivin's rockcress
• Arabis calderi — Calder's rockcress
• Arabis canadensis — sicklepod
• Arabis codyi — Cody's rockcress
• Arabis drummondii — Drummond's rockcress
• Arabis glabra — tower-mustard
• Arabis hirsuta — western hairy rockcress
• Arabis holboellii — Holböll's rockcress
• Arabis laevigata — smooth rockcress
• Arabis lemmonii — Lemmon's rockcress
• Arabis lignifera — Owens Valley rockcress
• Arabis lyallii — Lyall's rockcress
• Arabis lyrata — lyreleaf rockcress
• Arabis microphylla — small-leaf rockcress
• Arabis murrayi — Murray's rockcress
• Arabis nuttallii — Nuttall's rockcress
• Arabis shortii — Short's rockcress
• Arabis sparsiflora — elegant rockcress
• Arabis x divaricarpa — hybrid rockcress
• Armoracia lacustris — lake-cress
• Athysanus pusillus — common sandweed
• Barbarea orthoceras — American wintercress
• Braya fernaldii — Fernald's northern rockcress
• Braya glabella — smooth rockcress
• Braya humilis — low braya
• Braya longii — Long's braya
• Braya pilosa — hairy rockcress
• Braya thorild-wulffii — Greenland rockcress
• Cakile edentula — American sea-rocket
• Cardamine angulata — seaside bittercress
• Cardamine bellidifolia — alpine bittercress
• Cardamine breweri — Brewer's bittercress
• Cardamine bulbosa — bulbous bittercress
• Cardamine concatenata — cutleaf toothwort
• Cardamine digitata — Richardson's bittercress
• Cardamine diphylla — two-leaf toothwort
• Cardamine douglassii — purple cress
• Cardamine lyallii — Lyall's bittercress
• Cardamine maxima — large toothwort
• Cardamine microphylla — littleleaf bittercress
• Cardamine nuttallii — Nuttall's toothwort
• Cardamine occidentalis — western bittercress
• Cardamine oligosperma — few-seed bittercress
• Cardamine parviflora — smallflower bittercress
• Cardamine pensylvanica — Pennsylvania bittercress
• Cardamine pratensis — cuckoo-flower
• Cardamine x anomala
• Cochlearia groenlandica — Greenland cochlearia
• Cochlearia officinalis — scurvy-grass
• Cochlearia tridactylites — limestone scruvy-grass
• Descurainia incana — mountain tansy-mustard
• Descurainia pinnata — pinnate tansy-mustard
• Descurainia sophioides — northern tansy-mustard
• Draba albertina — slender whitlow-grass
• Draba alpina — alpine whitlow-grass
• Draba arabisans — rock whitlow-grass
• Draba arctogena — fell-field whitlow-grass
• Draba aurea — golden draba
• Draba borealis — boreal whitlow-grass
• Draba cana — hoary draba
• Draba cinerea — greyleaf whitlow-grass
• Draba corymbosa — flat-top whitlow-grass
• Draba crassifolia — snowbed whitlow-grass
• Draba densifolia — denseleaf whitlow-grass
• Draba fladnizensis — white arctic whitlow-grass
• Draba glabella — rock whitlow-grass
• Draba hyperborea — North Pacific whitlow-grass
• Draba incana — hoary whitlow-grass

• Draba incerta — Yellowstone whitlow-grass
• Draba juvenilis — longstalk whitlow-grass
• Draba kananaskis — tundra whitlow-grass
• Draba kluanei — Kluane Park whitlow-grass
• Draba lactea — milky whitlow-grass
• Draba laurentiana — St. Lawrence whitlow-grass
• Draba lonchocarpa — lancepod whitlow-grass
• Draba macounii — Macoun's whitlow-grass
• Draba macrocarpa — Chukchi Peninsula whitlow-grass
• Draba murrayi — Murray's whitlow-grass
• Draba nemorosa — wood whitlow-grass
• Draba nivalis — yellow arctic whitlow-grass
• Draba norvegica — Norwegian whitlow-grass
• Draba oblongata — Canadian arctic whitlow-grass
• Draba ogilviensis — Ogilvie Range whitlow-grass
• Draba oligosperma — few-seed whitlow-grass
• Draba palanderiana — Palander's whitlow-grass
• Draba pauciflora — Adam's whitlow-grass
• Draba paysonii — Payson's whitlow-grass
• Draba porsildii — Porsild's whitlow-grass
• Draba praealta — tall whitlow-grass
• Draba pycnosperma — dense whitlow-grass
• Draba reptans — Carolina whitlow-grass
• Draba ruaxes — Rainier's whitlow-grass
• Draba scotteri — Scotter's whitlow-grass
• Draba stenoloba — Alaska whitlow-grass
• Draba stenopetala — Anadyr whitlow-grass
• Draba subcapitata — Ellesmere Island whitlow-grass
• Draba ventosa — Wind River whitlow-grass
• Draba yukonensis — Yukon whitlow-grass
• Erysimum angustatum — Dawson wallflower
• Erysimum arenicola — Cascade wallflower
• Erysimum asperum — prairie-rocket wallflower
• Erysimum capitatum — western wallflower
• Erysimum cheiranthoides — wormseed wallflower
• Erysimum inconspicuum — smallflower prairie wallflower
• Erysimum pallasii — Pallas' wallflower
• Eutrema edwardsii — Edwards' eutrema
• Halimolobos mollis — soft rockcress
• Halimolobos virgata — virgate halimolobos
• Halimolobos whitedii — Whited's rockcress
• Hutchinsia procumbens — prostrate hymenolobus
• Idahoa scapigera — scapose scalepod
• Lepidium densiflorum — denseflower pepper-grass
• Lepidium oxycarpum — sharp-pod pepper-grass
• Lepidium ramosissimum — branched pepper-grass
• Lepidium virginicum — poor-man's pepper-grass
• Lesquerella alpina — alpine bladderpod
• Lesquerella arctica — arctic bladderpod
• Lesquerella arenosa — Great Plains bladderpod
• Lesquerella calderi — Calder's bladderpod
• Lesquerella douglasii — Douglas' bladderpod
• Lesquerella ludoviciana — silver bladderpod
• Parrya arctica — arctic false-wallflower
• Parrya nudicaulis — naked-stemmed wallflower
• Physaria didymocarpa — common twinpod
• Rorippa barbareifolia — hoary yellowcress
• Rorippa calycina — persistent-sepal yellowcress
• Rorippa crystallina — Asiatic cress
• Rorippa curvipes — Rocky Mountain yellowcress
• Rorippa curvisiliqua — curvepod yellowcress
• Rorippa palustris — bog yellowcress
• Rorippa sinuata — spreading yellowcress
• Rorippa tenerrima — Modoc County yellowcress
• Rorippa truncata — wild yellowcress
• Schoenocrambe linifolia — Salmon River plains-mustard
• Smelowskia borealis — northern smelowskia
• Smelowskia calycina — alpine smelowskia
• Smelowskia ovalis — alpine smelowskia
• Subularia aquatica — water awlwort
• Thelypodium laciniatum — cutleaf thelypody
• Thlaspi arcticum — arctic pennycress
• Thysanocarpus curvipes — fringepod

Bruchiaceae

• Bruchia flexuosa
• Trematodon ambiguus
• Trematodon boasii

• Trematodon longicollis
• Trematodon montanus

Bryaceae

• Anomobryum filiforme
• Bryum algovicum
• Bryum alpinum
• Bryum amblyodon
• Bryum archangelicum
• Bryum arcticum
• Bryum argenteum — silvery bryum
• Bryum blindii
• Bryum caespiticium
• Bryum calobryoides
• Bryum calophyllum
• Bryum canariense
• Bryum capillare
• Bryum cyclophyllum
• Bryum dichotomum — bryum moss
• Bryum erythroloma
• Bryum flaccidum
• Bryum gemmascens
• Bryum gemmiparum
• Bryum klinggraeffii
• Bryum knowltonii
• Bryum lisae
• Bryum lonchocaulon
• Bryum longisetum
• Bryum marratii
• Bryum meesioides
• Bryum miniatum
• Bryum muehlenbeckii
• Bryum nitidulum
• Bryum oblongum
• Bryum pallens
• Bryum pallescens
• Bryum pseudotriquetrum
• Bryum purpurascens
• Bryum ruderale
• Bryum salinum
• Bryum schleicheri
• Bryum stirtonii
• Bryum subapiculatum
• Bryum subneodamense
• Bryum tenuisetum
• Bryum teres
• Bryum turbinatum

• Bryum uliginosum
• Bryum violaceum
• Bryum warneum
• Bryum weigelii
• Bryum wrightii
• Epipterygium tozeri
• Leptobryum pyriforme
• Mielichhoferia macrocarpa
• Mielichhoferia mielichhoferiana
• Plagiobryum demissum
• Plagiobryum zieri
• Pohlia andalusica
• Pohlia annotina
• Pohlia atropurpurea
• Pohlia bolanderi
• Pohlia brevinervis
• Pohlia bulbifera
• Pohlia camptotrachela
• Pohlia cardotii
• Pohlia columbica
• Pohlia cruda
• Pohlia crudoides
• Pohlia drummondii
• Pohlia elongata
• Pohlia erecta
• Pohlia filum
• Pohlia lescuriana
• Pohlia longibracteata
• Pohlia longicolla
• Pohlia ludwigii
• Pohlia melanodon
• Pohlia nutans
• Pohlia obtusifolia
• Pohlia pacifica
• Pohlia proligera
• Pohlia sphagnicola
• Pohlia tundrae
• Pohlia vexans
• Pohlia wahlenbergii
• Rhodobryum ontariense
• Rhodobryum roseum — rose moss
• Roellia roellii

Buxbaumiaceae

• Buxbaumia aphylla — bug-on-a-stick
• Buxbaumia minakatae — hump-backed elves
• Buxbaumia piperi

• Buxbaumia viridis
• Diphyscium foliosum — powder gun moss