Vascular Plants

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Scientific names beginning with C:
134 genera
554 species, 132 subspecies and varieties
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Index to genera:
Cabomba, Cacaliopsis, Cakile, Calamagrostis, Calamovilfa, Calandrinia, Calendula, Callitriche, Callitropsis, Calochortus, Caltha, Calycanthus, Calypso, Calyptridium, Calystegia, Camassia, Camelina, Camissonia, Campanula, Canadanthus, Cannabis, Capsella, Caragana, Cardamine, Cardionema, Carduus, Carex, Carthamus, Carum, Cascadia, Cassiope, Castanea, Castilleja, Catabrosa, Catalpa, Caulanthus, Ceanothus, Celtis, Cenchrus, Centaurea, Centaurium, Centranthus, Centromadia, Cephalanthera, Cerastium, Ceratocephala, Ceratophyllum, Cercocarpus, Chaenactis, Chaenorhinum, Chaerophyllum, Chamaenerion, Chelidonium, Chenopodium, Cherleria, Chimaphila, Chondrilla, Chorispora, Chorizanthe, Chrysolepis, Chrysosplenium, Chrysothamnus, Chylismia, Cicer, Cichorium, Cicuta, Cimicifuga, Cinna, Circaea, Cirsium, Citrullus, Clarkia, Claytonia, Clematis, Clinopodium, Clintonia, Cochlearia, Coeloglossum, Coix, Colchicum, Coleanthus, Collinsia, Collomia, Columbiadoria, Colutea, Comandra, Comarum, Comastoma, Commelina, Conioselinum, Conium, Conringia, Consolida, Convallaria, Convolvulus, Conyza, Coptis, Corallorhiza, Cordylanthus, Coreopsis, Corispermum, Cornus, Corrigiola, Cortaderia, Corydalis, Corylus, Corynephorus, Cota, Cotoneaster, Cotula, Crassula, Crataegus, Crepis, Crocidium, Crocosmia, Crocus, Croton, Cruciata, Crupina, Crypsis, Cryptantha, Cryptogramma, Cuscuta, Cusickiella, Cyclachaena, Cymbalaria, Cymopterus, Cynodon, Cynoglossum, Cynosurus, Cyperus, Cypripedium, Cystopteris, Cytisus
Cabomba carolinianafanwort
Cacaliopsis nardosmiasilvercrown luina, tall silvercrown
Distribution: Occurring chiefly east of the Cascades in Washington; British Columbia south to California.
Habitat: Meadows and open forests, moderately dry.
Cakile edentula
Distribution: Occurring in coastal counties in Washington; Alaska south to California along the coast.
Habitat: At water's edge in sand or gravel.
ssp. edentula – American sea rocket
Cakile maritimaEuropean sea rocket
Distribution: Occurring along coastal counties in Washington; British Columbia south to California along the coast.
Habitat: At water's edge in sand or gravel.
Calamagrostis canadensis
Distribution: Alaska to Quebec, south through the United States except for the Deep South
Habitat: Wet places, sea level to mid-elevations in the mountains
var. canadensis – ?, bluejoint reedgrass
var. langsdorfii – ?
Calamagrostis howelliiHowell's reed grass
Calamagrostis koelerioidespineland reed grass
Calamagrostis nutkaensisNootka reed grass
Calamagrostis purpurascenspurple reedgrass
Calamagrostis rubescenspinegrass
Distribution: British Columbia to California, east to Alberta, Montana and Colorado
Habitat: Dry to moist areas, open sagebrush flats to timbered slopes, moderate to mid-elevations in the mountains
Calamagrostis sesquifloraone-and-a-half-flower reed grass
Calamagrostis stricta
ssp. inexpansa – narrow-spiked reedgrass
ssp. stricta – narrow-spiked reedgrass
Calamagrostis tacomensisRainier reedgrass
Calamagrostis tweedyiCascade reed grass
Distribution: Wenatchee Mountains, Chelan and Kittitas County, Washington, and Idaho County, Idaho
Habitat: Moist meadows and subalpine slopes, usually in timber
Calamovilfa longifolia
var. longifolia – prairie sandgrass sandreed, prairie sandreed
Calandrinia ciliatafringed redmaids, redmainds
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California, east to Arizona and New Mexico.
Habitat: Gravelly to heavy soil, usually where vernally moist, at low elevations.
Calendula officinalispot marigold
Callitriche hermaphroditicaautumn water-starwort, northern water-starwort
Distribution: Across northern North America, south to central California, northern New Mexico, the Great Lakes, and northeast United States.
Habitat: Sloughs and streams.
Callitriche heterophylladifferent-leaved water-starwort
Distribution: North and South America and Greenland.
Habitat: Sloughs and slow-moving, fresh water.
Callitriche marginatawinged water-starwort
Distribution: Reported from eastern counties in Washington; British Columbia south to California.
Habitat: Ponds, lakes, slow-moving streams.
Callitriche palustrisspring water-starwort, vernal water-starwort
Distribution: General in North America except Mexico and south and southeast United States.
Habitat: Sloughs and slow-moving fresh water.
Callitriche stagnalispond water-starwort
Distribution: Introduced in the Pacific Coast states, Montana, and some Eastern states
Habitat: Uncommon in streams, ponds and ditches
Callitropsis nootkatensisAlaskan yellow cedar
Distribution: In the Cascades and Olympic Mountains of Washington; Alaska south at increasing altitudes to northern California.
Habitat: Moist areas, mid- to high elevations in the mountains.
Calochortus apiculatusBaker's mariposa, three-spot mariposa-lily
Distribution: Occurring in the northeast corner of Washington; southern British Columbia south to Washington, east to Alberta, Idaho, and Montana.
Habitat: Dry, rocky slopes in open coniferous woods.
Calochortus elegans
Distribution: East of the Casades in Washington; Washington south to Oregon and northern California, east to Idaho and Montana.
Habitat: Grassy hillsides and open coniferous forests, mid- to high elvations in the mountains.
var. elegans – elegant cat's ear, northwest mariposa lily
Calochortus eurycarpusbig-pod mariposa lily, wide-fruited mariposa
Distribution: Occurring in southeastern Washington; eastern Oregon, east to Montana and Wyoming.
Habitat: Grasslands and open coniferous forests at moderate elevations.
Calochortus longebarbatuslong-bearded sego lily
Distribution: Yakima County, Washington, south through eastern Oregon to northern California.
Habitat: Open meadows, low to moderate elevations.
Calochortus lyalliiLyall's mariposa-lily
Distribution: East of the Cascades in Washington; British Columbia south along the east slope of the Cascades in Washington.
Habitat: Dry, open coniferous forests at moderate to mid-elevations in the mountains.
Calochortus macrocarpus
Distribution: East of the Cascades in Washington; British Columbia south to California, east to Montana and Nevada.
Habitat: Dry open forests and hills, low to moderate elevations.
var. macrocarpus – sagebrush mariposa
var. maculosus – sagebrush mariposa
Calochortus nitidusbroad-fruited mariposa lily
Distribution: Occurring in Whitman County in Washington; Washington east to adjacent areas of Idaho and in northeast Oregon.
Habitat: Meadows at low elevation.
Calochortus subalpinusmountain mariposa, subalpine mariposa-lily
Distribution: Chiefly in the Cascades of Washington near Mt. Adams and Mt St. Helens, Washington; south to the Three Sisters in Oregon.
Habitat: Open forests in loose volcanic soils, mid- to high elevations in the mountains.
Caltha leptosepalaelkslip
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains.
Habitat: Wet places in subalpine and alpine regions.
Caltha palustrisyellow marshmarigold
Distribution: Coastal Alaska, south along the coast to Oregon
Habitat: Mostly in coastal bogs
Calypso bulbosa
Distribution: Widely distributed throughout Washington; Alaska to Labrador, south to California and New York.
Habitat: Mostly in cool, deep shade of moist forests in soil rich in humus, sea level to mid-elevations in the mountains.
var. americana – calypso, fairy-slipper
var. occidentalis – calypso, fairy-slipper
Calyptridium roseumrosy pussypaws
Calyptridium umbellatumpussypaws
Distribution: In Washington occurring throughout the Cascades Mountains; British Columbia south to Baja California, east to Montana, Wyoming and Utah.
Habitat: Ponderosa pine woods, to subalpine sandy flats and knolls, to the alpine.
Calystegia atriplicifolia
ssp. atriplicifolia – night-blooming morning-glory
Camassia cusickiiCusick's camas
Distribution: Known from Klickitat County in Washington; Washington Oregon, east to west-central Idaho.
Habitat: Open hillsides at low to moderate elevations.
Camassia leichtlinii
Distribution: Chiefly west of the Cascades crest in Washington; British Columbia south to California.
Habitat: Meadows, prairies and hillsides where moist, at least in early spring.
ssp. suksdorfii – large camas
Camassia quamash
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Montana and Utah.
Habitat: Open, moist areas, often where dry by late spring, at low to mid-elevations in the mountains.
ssp. azurea – blue camas, prairie camas
ssp. breviflora – eastern camas
ssp. maxima – dark camas, large camas
ssp. quamash – common camas
Camelina microcarpahairy false flax, littlepod false flax
Distribution: East of the Cascades and in the Columbia River Gorge in Washington; widely distributed throughout nearly all of North America.
Habitat: Weed of dry places.
Camissonia contortacontorted pod suncup, twisted suncup
Distribution: Along the coast and along the Columbia and Snake Rivers in Washington; British Columbia south to Baja California, east to the Rocky Mountains.
Habitat: Sandy soil along the coast and along inland rivers.
Camissonia parvulaLewis river suncup
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia south to California, east to Idaho and Nevada.
Habitat: Open to disturbed grasslands, sandy areas, sagebrush, and scrub forest.
Campanula lasiocarpaAlaska bellflower, Alaska harebell
Distribution: Local in Washington to western Cascades of Puget Trough; Alaska south to Washington, east to Northwest Territories and Alberta.
Habitat: Uncommon in meadows at high elevations in the mountains
Campanula parryi
Distribution: Local in Olympic and Cascade Mountains of Washington; central and northern Idaho and adjacent Montana.
Habitat: High elevations in the mountains.
var. idahoensis – Parry's harebell
Campanula persicifoliapeach-leaf bellflower
Distribution: West of the Cascades in Washington; British Columbia to Oregon and Utah; eastern North America; introduced from Europe.
Habitat: Escaping from cultivation; occurring in moderately moist, disturbed soil.
Campanula piperiOlympic bellflower
Distribution: Olympic Mountains in Washington; Vancouver Island, British Columbia.
Habitat: Open, rocky areas at high elevations.
Campanula rapunculoidescreeping bellflower, rover harebell
Distribution: Introduced garden species, often escaping in scattered localities across Washington; British Columbia to Oregon.
Habitat: Moist soil at low elevations
Campanula rotundifoliabluebell-of-scotland
Distribution: Widely distributed throughout Washington; circumboreal.
Habitat: Open, rocky areas from low elevations to the alpine.
Campanula scabrellarough bellflower, rough harebell
Distribution: In the Cascades of Washington; Washington south to California, east to Idaho and Montana.
Habitat: Open, rocky areas at high elevations.
Campanula scouleripale bellflower
Distribution: Occurring on both sides of the Cascades crest in Washington, but chiefly to the west; Alaska to California.
Habitat: Openings in moist woods, low to moderate elevations.
Canadanthus modestusfew flowered aster, great northern aster
Distribution: Widely distributed throughout mountainous areas of Washington; British Columbia south to Oregon, east to Michigan.
Habitat: Streambanks and moist woods at moderate to mid-elevations in the mountains.
Cannabis sativahemp, marihuana
Distribution: Introduced in much of the United States
Habitat: Illegal plantings in openings in the forests
Capsella bursa-pastorisshepherd's-purse
Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Weed of disturbed ground.
Caragana arborescensSiberian peashrub
Distribution: Occurring east of the Cascades crest in Washington; widely distributed throughout the western, central, and northeastern regions of North America.
Habitat: Disturbed areas including wastelots, roadsides, and fields.
Cardamine angulataangled bittercress, seaside bittercress
Distribution: West of the Cascades in Washington; Alaska south to northern California.
Habitat: Wet ground, especially along stream banks, often in deep woods.
Cardamine bellidifoliaalpine bittercress
Distribution: In the Olympic and Cascade mountains in Washington; circumpolar, south in North America to California and New Hampshire.
Habitat: Subalpine to alpine meadows.
Cardamine breweriBrewer's bittercress, round bittercress
Distribution: Distributed on both sides of the Cascades in Washington; British Columbia to California, east to the Rocky Mountains from Montana south to Colorado.
Habitat: Stream margins, wet meadows, pond shores, and other riparian areas.
Cardamine cordifoliaheart-leaved bittercress, large mountain bittercress, Lyall's bittercress
Distribution: In the Cascades, but not the Olympic Mountains, in Washington; British Columbia south to California, east to Idaho.
Habitat: Streambanks and moist meadows in the mountains.
Cardamine corymbosaNew Zealand bittercress
Cardamine flexuosawavy bittercress
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California, also in central and eastern North America.
Habitat: Disturbed ground, often where moist.
Cardamine hirsutahairy bittercress
Distribution: Widely distributed throughout Washington; British Columbia to California and throughout much of the eastern half of the U.S.
Habitat: Disturbed ground at low elevations.
Cardamine nuttalliibeautiful bittercres, beautiful bittercress, Nuttall's toothwort, slender toothwort
Distribution: Occurring on both sides of the Cascades crest in Washington; Washington south to California.
Habitat: Seasonally moist soils of forest openings to forest understory, from low to moderate elevations.
Cardamine occidentaliswestern bittercress
Cardamine occultawood bittercress
Cardamine oligospermafew-seeded bittercress, little western bittercress
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains; more common west of the Cascades in Washington.
Habitat: Widespread, but mostly in seasonally wet, open or forested areas.
Cardamine pensylvanicaPennsylvania bittercress, quaker bittercress
Distribution: Widespread throughout Washington; British Columbia south to California, east through the Rockies to the Atlantic Coast.
Habitat: Moist places.
Cardamine pratensiscuckooflower, cuckoo flower
Distribution: Currently known only from King County in Washington; British Columbia south to Oregon; more commonly found in northeastern North America.
Habitat: Disturbed areas including lawns and forest edges of urban and suburban areas.
Cardamine umbellataSiberian bittercress, umbellate bittercress
Cardionema ramosissimasandcarpet, sandmat
Distribution: Along the coast in Washington; south to Mexico.
Habitat: Sandy beaches along the coast.
Carduus acanthoidesplumeless thistle, spiny plumeless thistle
Distribution: Introduced in much of the United States; uncommon in Washington and Idaho
Habitat: Disturbed, dry ground.
Carduus nutansmusk thistle, nodding thistle
Distribution: Scattered introductions throughout the Pacific Northwest
Habitat: Moderately dry, open areas
Carduus pycnocephalusItalian plumeless thistle
Distribution: Known from Clallam County in Washington; Washington to California and Idaho, also in central and eastern U.S.
Habitat: Disturbed, open areas at low elevation.
ssp. pycnocephalus – Italian plumeless thistle
Carduus tenuiflorusslender flowered thistle, winged plumeless thistle
Distribution: Introduced in western WA; south to California and sparingly introduced in eastern U.S.
Habitat: Disturbed areas at low elevation
Carex albonigrablack-and-white-scaled sedge
Distribution: Occurring in the Cascade and Olympic mountains of Washington; Alaska south to California, east to the Rocky Mountains.
Habitat: Alpine areas, high elevation talus and scree.
Carex amplifoliabig-leaf sedge
Distribution: British Columbia to California, east to Idaho and the Steens Mountains of Oregon
Habitat: Swamps, bogs and other wet places, lowlands to moderate elevations in the mountains
Carex angustatamany-fruit sedge, wide-fruited sedge
Distribution: Chiefly east of the Cascades crest in Washington; Washington south to California, east to Idaho.
Habitat: Wet meadows in riparian zones from low to moderate elevations.
Carex anthoxantheagrassy-slope arctic sedge, yellow-flowered sedge
Distribution: Known from along the coast in Washington; Alaska south to Washington.
Habitat: Bogs and wet meadows from low to moderate elevations.
Carex apertaColumbia sedge
Carex aquatilis
Distribution: Circumboreal at high latitudes; east of the Cascades in Washington and Oregon
Habitat: Standing water or saturated soil, foothills to near timberline in the mountains
var. aquatilis – water sedge
var. dives – Sitka sedge
Carex arctanorthern clustered sedge
Carex atherodesawned sedge, wheat sedge
Carex athrostachyaslender-beak sedge
Carex atrosquamablack-scale sedge
Carex aureagolden sedge, pumpkin sedge
Distribution: Across Canada, south to California and Pennsylvania
Habitat: Moist or wet places from the lowlands to near timberline in the mountains
Carex backiiBack's sedge
Carex bebbiiBebb's sedge
Carex bolanderiBolander's sedge
Carex breviorPlains oval sedge, short-beaked sedge
Carex breweriBrewer's sedge
Distribution: In the Olympic and Cascade Mountains of Washington; Washington south to California, east to Nevada.
Habitat: Open slopes, ridges, and rocky areas of the subalpine and alpine.
Carex brunnescens
Distribution: Circumboreal at high latitudes, south through the Cascades to the Siskiyou Mountains of Oregon
Habitat: Wet places in the mountains
ssp. brunescens – brownish sedge
Carex buxbaumiibrown bog sedge, Buxbaum's sedge
Carex californicaCalifornia sedge
Carex canescens
ssp. canescens – grey sedge, silvery sedge
Carex capillarishair sedge
Carex capitatacapitate sedge
Distribution: Occurring in northwestern and north-central Washington near the Canadian border; Alaska south to California and Nevada (but not in Oregon), east to the Rocky Mountains in the U.S. and east across Canada to the Atlantic Coast; circumboreal.
Habitat: Alpine slopes.
Carex chordorrhizacordroot sedge, creeping sedge, rope-root sedge
Carex circinatacoiled sedge
Carex comosabearded sedge, bristly sedge
Distribution: Widespread in eastern United States, occasional in Washington, Idaho and Montana
Habitat: Marshes and wet meadows from the lowlands to moderate elevations in the mountains
Carex concinnoidesnorthwestern sedge, tetrastigmatic sedge
Carex cordilleranacordilleran sedge
Carex craweiCrawe's sedge
Carex crawfordiiCrawford's sedge
Carex cusickiiCusick's sedge
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho, Montana, and Wyoming.
Habitat: Wetlands, lake and pond edges, and other wet areas.
Carex davyiConstance's sedge, Davy's sedge
Carex deflexa
var. boottii – northern sedge
Carex densadense sedge
Carex deweyana
var. deweyana – Dewey's sedge
Carex diandralesser panicled sedge, lesser tussock sedge
Carex dispermashort-leaf sedge
Carex divulsa
ssp. divulsa – grassland sedge
Carex douglasiiDouglas' sedge
Distribution: Chiefly east of the Cascades in Washington; British Columbia south to California, east to central North America.
Habitat: Dry to wet soils in sagebrush grasslands, riparian zones, and forest margins.
Carex echinata
Distribution: Circumboreal, south to North Carolina and, in the mountains, to California
Habitat: Swamps, bogs and other wet places, lowlands to moderate elevations in the mountains
ssp. echinata – star sedge
ssp. phyllomanica – coastal star sedge
Carex engelmanniiMt. Adams sedge
Carex exsiccatabig inflated sedge
Carex fetagreen-sheath sedge
Distribution: West of the Cascades, British Columbia to California
Habitat: Marshes and wet meadows from the lowlands to moderate elevations in the mountains
Carex filifolia
var. filifolia – thread-leaf sedge
Carex flavayellow sedge, yellow-green sedge
Carex fractafragile-sheath sedge
Carex geyerielk sedge, Geyer's sedge
Distribution: East of the Cascades, British Columbia to California, east to Colorado
Habitat: Open woodlands and dry meadows, foothills to moderate elevations in the mountains
Carex gynocratesnorthern bog sedge
Carex hallianaHall's sedge
Carex hasseifalse golden sedge, Garber's sedge
Carex hendersoniiHenderson's sedge
Distribution: West of the Cascades, British Columbia to California
Habitat: Boggy areas and wet woods, low to mid-elevations in the mountains
Carex heteroneuradifferent-veined sedge, smooth-fruited sedge
Distribution: Occurring along the Canadian border in Washington; British Columbia south to California, east to Sasketchewan and Rocky Mountains.
Habitat: Moist to wet sites in the subalpine and alpine zones.
Carex hoodiiHood's sedge
Carex hystericinaporcupine sedge
Carex illotasmall-head sedge
Carex infirminerviaweak-veined sedge
Carex inops
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia to California, south in Rocky Mountains from Alberta to New Mexico, east to the Great Plains and Great Lakes region.
Habitat: Forest openings, open slopes, and near streams in the mountains.
ssp. inops – long-stolon sedge
Carex integrasmooth-beaked sedge
Carex interiorinland sedge
Carex interruptagreen-fruited sedge, interrupted sedge
Distribution: Along the Columbia River from Douglas County through Klickitat County, south in Oregon west of the Cascades
Habitat: Rocky banks and streambeds, and other low, wet places
Carex jonesiiJones' sedge
Carex kobomugiJapanese sedge
Carex lacustris
Distribution: Occurring in the northeastern corner of Washington; Alberta south to Idaho, east across the northern half of North America to the Atlantic Coast.
Habitat: Wetland, swamps, and marshes.
Carex laeviculmissmooth-stemmed sedge
Carex lasiocarpawiregrass
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to Idaho and Montana in our area; also throughout northeastern North America.
Habitat: Wet meadows, bogs, fens, streambanks, and lakeshores where sometimes forming floating mats.
Carex lenticularis
Distribution: Across Canada, south to California (in the mountains) and Massachusetts
Habitat: Wet meadows and streambanks, sea level to near timberline
var. impressa – few-ribbed sedge
var. limnophila – lakeshore sedge
var. lipocarpa – Kellogg's sedge, lakeshore sedge
Carex leporinahare sedge, oval broom sedge, oval sedge
Carex leporinellaSierra hare sedge
Carex leptaleadelicate sedge, jelly bean sedge
Carex leptopodashort-scaled sedge, slenderfoot sedge
Carex limosamud sedge
Carex lividalivid sedge, pale sedge
Carex longiiLong's sedge
Carex luzulinaspring sedge, woodrush sedge
Carex lyngbyeiLyngbye's sedge
Distribution: Circumboreal along the seacoasts; south to northern California in our area
Habitat: Coastal marches and tidal flats
Carex macrocephalabighead sedge
Distribution: Occurring in counties along the Puget Sound and outer coast in Washington; Alaska south to Oregon; northern Pacific Rim.
Habitat: Sandy saltwater beaches and dunes.
Carex macrochaetaAlaska long-awn sedge
Carex magellanica
ssp. irrigua – poor sedge
Carex mediaMontana sedge, Scandinavian sedge
Carex mertensiiMertens' sedge
Distribution: Alaska south in the mountains and the coast ranges of Oregon to northwest California
Habitat: Wet, open or shaded areas from the lowlands to near timberline
Carex micropodatimberline sedge
Carex micropterasmall-winged sedge
Distribution: Occurring on both sides of the Cascades crest in Washington; Yukon Territory south to Mexico, east to the Rocky Mountains.
Habitat: Moist to dry meadows and streambanks.
Carex nardinaspikenard sedge
Distribution: In the Olympics and Cascades of Washington;
Habitat: Alpine rocky outcroppings, slopes, and ridges.
Carex nebrascensisNebraska sedge
Distribution: East of the Cascades, Washington to California, east to Kansas
Habitat: Wet meadows and other wet areas, often in alkaline areas, lowlands to moderate elevations in the mountains
Carex neurophoraalpine nerve sedge
Carex nigricansblack alpine sedge
Carex nudatatorrent sedge
Carex obnuptaslough sedge
Distribution: West of the Cascades, British Columbia to California
Habitat: Standing water or saturated soil, coastal swamps and along rivers
Carex obtusatablunt sedge
Carex pachycarpafurrowed broomsedge
Carex pachystachyathick-head sedge
Carex pallescenspale green sedge
Carex pansasand sedge
Distribution: Along the coast in Washington; Washington south to California.
Habitat: Dunes, meadows, and other open areas along the coast.
Carex pauciflorafew-flowered edge
Distribution: Near the coast, Alaska to northern Washington, and in northeastern United States
Habitat: Bogs
Carex pellitawoolly sedge
Distribution: Widely distributed on both sides of the Cascades crest in Washington; widely distributed throughout North America except southeastern U.S.
Habitat: Wet to dry meadows from low elevations to montane.
Carex pendulapendulous sedge
Carex petasataLiddon's sedge
Carex phaeocephalamountain hare sedge
Carex pluriflorablack bog sedge
Carex praeceptorumteacher's sedge
Carex praegracilisclustered field sedge
Carex praticolanorthern meadow sedge
Carex presliiPresl's sedge
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Alberta, Idaho, and Montana.
Habitat: Open, dry to seasonally dry areas from montane to alpine.
Carex propositaSmoky Mountain sedge
Carex raynoldsiiRaynolds' sedge
Carex retrorsaretrorse sedge
Carex rossiiRoss' sedge
Carex rostratanorthern beaked sedge
Distribution: Alaska to Washington, east to Montana, and in the Great Lakes region
Habitat: Sphagnum bogs
Carex saxatilislimestone sedge, russet sedge
Carex scirpoidea
ssp. stenochlaena – Alaska singlespike sedge
Carex scoparia
var. scoparia – pointed broomsedge
Carex scopulorum
var. bracteosa – Sierra alpine sedge
var. prionophylla – firethread sedge
Carex sheldoniiSheldon's sedge
Carex siccatadry-spike sedge
Carex simulataanalogue sedge
Carex spectabilisshowy sedge
Distribution: Alaska to California, east to Alberta and Montana
Habitat: Damp meadows and other wet places, mid- to high elevations in the mountains
Carex stipata
Distribution: Alaska, Canada and most of the United states
Habitat: Wet ground, lowlands (especially west of the Cascades) to mid-elevations in the mountains
var. stipata – awl-fruited sedge, sawbeak sedge
Carex straminiformisMt. Shasta sedge
Carex stylosalong-style sedge
Distribution: Alaska to Clallam County, Washington, east across Canada to Labrador
Habitat: Usually near the coast
Carex subfuscarusty sedge
Carex sychnocephalamany-headed sedge
Carex sylvaticaEuropean woodland sedge
Carex tahoensisLake Tahoe sedge
Carex tenera
var. tenera – quill sedge, slender sedge
Carex tenuiflorasparse-flower sedge
Carex tribuloides
Distribution: In Washington known only from King and Pierce counties; central Great Plains of the U.S. north and east to Atlantic Coast
Habitat: Lowland riparian areas, likely associated with disturbance.
var. tribuloides – blunt broom sedge
Carex tumulicolafoothill sedge
Carex unilateralisone-sided sedge
Carex utriculatabeaked sedge, inflated sedge, Northwest Territory sedge
Carex vallicolavalley sedge
Carex vernaculafoetid sedge
Carex vesicariainflated sedge, oxbow sedge
Carex viridula
ssp. viridula – greenish sedge, little green sedge
Carex vulpinoideafox sedge
Distribution: Much of the United States and southern Canada; chiefly east of the Cascades in Washington
Habitat: Marshes and standing water, lowlands and foothills
Carex zikaeshort-stemmed sedge, Zika's sedge
Carthamus tinctoriussafflower
Distribution: Escaped from cultivation in many western and mid-western states.
Habitat: Disturbed sites.
Carum carvicaraway
Cascadia nuttalliiNuttall's saxifrage
Distribution: Grays Harbor and Pacific counties in Washington; Washington south along the Oregon coast to Curry County, Oregon.
Habitat: Wet banks and near waterfalls, usually growing in moss.
Cassiope lycopodioidesground pine heather, clubmoss mountain heather; club-moss mountain-heather
Distribution: Occurring west of the Cascades crest in Washington; Alaska south to Washington.
Habitat: Alpine rocky slopes and crevices.
Cassiope mertensiana
Distribution: Occurring on both sides of the Cascades in Washington; Alaska south to California, east to Montana, Idaho, and Nevada.
Habitat: Open, rocky areas in the alpine and subalpine.
ssp. mertensiana – Mertens' mountain heather, western moss heather
Cassiope tetragona
Distribution: Alaska to Washington, also in Montana
Habitat: Open, rocky areas in the alpine and subalpine
ssp. saximontana – four-angled mountain heather, white arctic mountain heather
Castanea sativaSpanish walnut, sweet walnut
Castilleja ambigua
Distribution: Coastal areas, Washington to California
Habitat: Salt marshes and borders of brackish ponds
var. ambigua – salt-marsh paintbrush
Castilleja attenuataattenuate paintbrush, valley-tassels
Distribution: Chiefly west of the Cascades in Washington; British Columbia south to California and Arizona.
Habitat: Drier areas at low elevations.
Castilleja cervinadeer paintbrush
Distribution: Northeast Washington; British Columbia east to northern Idaho and Montana.
Habitat: Grasslands and woodlands at moderate to mid-elevations
Castilleja chambersiiChambers's Indian paintbrush
Distribution: Known only from Pacific County in Washington; Pacific County, WA south to Clatsop County, OR.
Habitat: Forest openings, embankments, and rock outcroppings typically where moist.
Castilleja cryptanthaobscure paintbrush
Distribution: Endemic to Mt. Rainier National Park and immediate vicinity, Washington.
Habitat: Moist subalpine meadows.
Castilleja cusickiiCusick's paintbrush
Distribution: East of the Cascades in Washington; Alberta south to Montana and Wyoming, west through Idaho to northeast Oregon.
Habitat: Open areas, lower valleys to subalpine meadows.
Castilleja elmeriElmer's paintbrush
Distribution: Wenatchee Mountains and the east slope of the Cascades, Kittitas County, Washington; north into British Columbia.
Habitat: Moist, open slopes at mid-elevations in the mountains.
Castilleja hispida
Distribution: Both sides of the Cascades, British Columbia to Oregon, east to Montana
Habitat: Grassy slopes and forest openings, from sea level to moderate elevations in the mountains
var. acuta – harsh paintbrush
var. hispida – harsh paintbrush
Castilleja levisectagolden paintbrush
Distribution: Puget Sound of Washington; Vancouver Island south to the Willamette Valley of Oregon.
Habitat: Meadows and prairies at low elevations.
Castilleja lutescensyellow paintbrush
Distribution: Eastern Washington; east to northwestern Montana and south through Idaho to northeastern Oregon.
Habitat: Low, dry grasslands and woodlands, occasionally to high elevations in the mountains.
Castilleja miniata
Distribution: Occurring throughout much of Washington; Alaska south to California, east to the Rocky Mountains in the U.S., east to Ontario in Canada.
Habitat: Mountain meadows and slopes; also on coastal bluffs; widespread and common.
var. dixonii – Dixon's paintbrush
var. miniata – scarlet paintbrush
Castilleja minor
Distribution: Central Washington and eastern Oregon to southern Montana, south to Arizona.
Habitat: Alkaline marshes and meadows, mostly at low elevations.
var. exilis – seep paintbrush
Castilleja parviflora
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to Alberta.
Habitat: Subalpine meadows and forest openings at high elevations.
var. albida – mountain Indian paintbrush
var. olympica – Olympic paintbrush
var. oreopola – magenta paintbrush
Castilleja rhexiifoliarhexia-leaved paintbrush
Distribution: In the North Cascades and northeast corner of Washington; British Columbia and Alberta south to Nevada and east to New Mexico.
Habitat: Meadows and open slopes at moderate to high elevations in the mountains.
Castilleja rupicolacliff paintbrush
Distribution: Chiefly west of the Cascades in Washington; from southern British Columbia to central Oregon.
Habitat: Rock crevices and rocky slopes, usually above timberline.
Castilleja suksdorfiiSuksdorf's paintbrush
Distribution: In Washington chiefly in the Cascades from Mt. Adams south, occasionally north to Whatcom County; south to Crater Lake, Oregon.
Habitat: Subalpine meadows and forests along streams and wet areas.
Castilleja tenuisthin paintbrush
Distribution: Both sides of the Cascades in Washington but more common eastward; British Columbia south to California.
Habitat: Vernally moist meadows and other moist sites, from the lowlands to moderate elevations in the mountains.
Castilleja thompsoniiThompson's paintbrush
Distribution: East of the Cascade summits in Washington; British Columbia south to Oregon.
Habitat: Dry sagebrush deserts to high mountain ridges.
Castilleja victoriaeVictoria's paintbrush
Distribution: San Juan Islands in WA; Victoria, B.C.
Habitat: Seasonally moist balds.
Caulanthus lasiophyllusCalifornia mustard, cutleaf thelypody, coast range western-cabbage
Ceanothus integerrimusdeerbrush
Distribution: East of the Cascades in Washington along and near the Columbia; Washington south to Baja California.
Habitat: Dry, open forests and open areas at low to moderate elevations.
Ceanothus prostratusMahala mat, squawcarpet
Distribution: East slope of the Cascades in Washington from , Yakima County south; Washington south to California, east to Idaho and western Nevada.
Habitat: Drier open woods, moderate to mid-elevations in the mountains.
Ceanothus sanguineusredstem ceanothus, Oregon teatree
Distribution: Widely distributed on both sides of the Cascades in Washington; British Columbia to California, east to Idaho.
Habitat: Moist to dry open woods, low to moderate elevations.
Ceanothus velutinus
Distribution: Widely distributed on both sides of the Cascades in Washington; British Columbia to California, east to South Dakota and Colorado.
Habitat: Moist to dry open forests, low to mid-elevations in the mountains.
var. laevigatus – mt. balm, greasewood, sticky-laurel
var. velutinus – mt. balm, greasewood
Celtis reticulatanetleaf hackberry
Distribution: Primarily along the Columbia River and Snake River in Washington; Washington south to California, east through Southern Rockies to Kansas, Oklahoma and Texas.
Habitat: Open slopes and rocky bluffs.
Cenchrus longispinuslongspine sandbur, mat sandbur
Distribution: Eastern Washington, south to Mexico, east to much of the United States.
Habitat: Sandy river banks.
Cenchrus spinifexcoastal sandbur, common sandbur
Centaurea benedictablessed thistle
Centaurea calcitrapapurple starthistle, red starthistle
Centaurea cyanusbachelor's button, garden cornflower
Distribution: Widespread introductions in the Pacific Northwest
Habitat: Readily established when escaped from cultivation
Centaurea diffusadiffuse knapweed, tumble knapweed, white knapweed
Distribution: Introduced throughout the Pacific Northwest; widespread and common in eastern Washington
Habitat: Noxious weed of dry, disturbed areas
Centaurea ×gerstlauerihybrid knapweed
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia to California, east to Idaho and Montana; also in eastern North America.
Habitat: Open ground, often where disturbed.
Centaurea ibericaIberian knapweed, Iberian starthistle
Centaurea jaceabrown knapweed, brownray knapweed
Centaurea macrocephalaglobe knapweed
Distribution: Sparingly introduced in Washington
Habitat: Occasionally escapes from cultivation
Centaurea melitensisMaltese starthistle, tocalote
Distribution: Occurring chiefly west of the Cascades in Washington; British Columbia south to California and Mexicos, east to Texas and eastern North America.
Habitat: Roadsides and waste places.
Centaurea ×moncktoniimeadow knapweed, protean knapweed
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho and Montana; also in the upper Midwest of the U.S. and northeastern North America.
Habitat: Disturbed meadows and forest openings, roadsides, and waste areas.
Centaurea montanamountain bluet, mountain cornflower, montane starthistle
Distribution: In scattered locations throughout Washington, but more common west of the Cascades; British Columbia to Oregon, east to Montana and Utah; in upper midwestern and northeastern U.S. and Canada.
Habitat: Occasionally escapes from cultivation; open, disturbed areas in shrub-steppe, forests, and along roadsides.
Centaurea nigrahardheads, black knapweed, lesser knapweed
Distribution: Introduced in the Pacific Northwest and northeastern United States
Habitat: Uncommon weed in disturbed soil
Centaurea nigrescensshort fringed knapweed, Tyrol knapweed
Distribution: Introduced and widely distributed in northeast United States and southeast Canada; occasional in the Pacific Northwest.
Habitat: Fields, roadsides and waste places.
Centaurea solstitialisyellow starthistle, St. Barnaby's thistle
Distribution: Introduced in most of the United States; chiefly east of the Cascades in Washington and Oregon
Habitat: Noxious weed of dry, disturbed areas
Centaurea stoebe
Distribution: Widely established throughout Washington; occurring throughout much of North America.
Habitat: Fields, roadasides, and waste areas.
ssp. micranthos – spotted knapweed
Centaurea trichocephalafeatherhead knapweed
Centaurium erythraeaEuropean centaury, VPBC2], common centaury [H&C
Distribution: Chiefly west of the Cascades in Washington; British Columbia south to California east to Idaho; eastern North America.
Habitat: Escaped to meadows, prairies and wasteland.
Centaurium pulchellumbranching centaury, lesser centaury
Centranthus ruberJupiter's-beard
Distribution: Introduced in Oregon, California, Utah and Arizona
Habitat: Garden ornamental, occasionally escapes
Centromadia pungens
Distribution: Known from central and southeastern Washington; Native in California; Washington south to California, east to Idaho, Nevada, and Arizona.
Habitat: Roadsides, fields and waste places.
ssp. pungens – common spikeweed, western spikeweed
Cephalanthera austiniaephantom orchid
Distribution: Both sides of the Cascades and in the Blue Mountains of Washington; British Columbia south to California, east to Idaho.
Habitat: Generally deep coniferous woods where somewhat moist.
Cerastium arvense
Distribution: Both sides of the Cascades and in the Blue Mountains in Washington. Widely distributed throughout North America.
Habitat: Coastal cliffs to inland valleys, rocky hillsides, subalpine meadows.
ssp. strictum – field chickweed
Cerastium beeringianumalpine chickweed
Distribution: Occurring in the Cascade Mountains in Washington; Alaska south to California, east to the Rocky Mountains in the U.S.; east across Canada to the Atlantic coast.
Habitat: Alpine zone, mostly in cirques or on talus.
Cerastium brachypetalum
ssp. brachypetalum – gray chickweed, gray mouse ear
Cerastium brachypodumshort-stalk mouse-ear chickweed
Cerastium dichotomumdry chickweed
Distribution: Washington to California.
Habitat: Disturbed areas, especially along roadsides.
Cerastium dubiumdoubtful mouse-ear chickweed
Cerastium fontanum
Distribution: Introduced and common in most of Canada and the United States; more common east of the Cascades
Habitat: Disturbed ground, lawns and gardens
ssp. vulgare – common chickweed, mouse-ear chickweed
Cerastium glomeratumsticky mouse-ear chickweed
Distribution: Widely distributed throughout Washington, but more common west of the Cascades crest; occurring throughout western and eastern North America.
Habitat: Low elevations in disturbed ground.
Cerastium nutans
Distribution: Occurring on both sides of the Cascades in Washington; Alaska south to Oregon, south in the Rocky Mountains to New Mexico and Arizona, east to the Atlantic Coast.
Habitat: Dry to moist banks and woodlands.
var. nutans – nodding chickweed
Cerastium pumilumdwarf chickweed, dwarf mouse ear
Distribution: Introduced at scattered locations in Washngton.
Habitat: Dry, sandy or gravelly places, roadsides.
Cerastium semidecandrumlittle chickweed, little mouse ear
Cerastium tomentosumsnow-in-summer
Distribution: Occasionally escaping cultivation in lowland northwestern Washington; British Columbia to Oregon, east across northern U.S. and southern Canada to Atlantic Coast.
Habitat: Fields, roadsides, waste sites.
Ceratocephala testiculatahornseed buttercup
Distribution: Introduced in all of western United States, and east in the northern half of the United States to Ohio; chiefly east of the Cascades in Washington and Oregon
Habitat: Disturbed soil in sagebrush deserts and plains
Ceratophyllum demersumcoon's-tail
Distribution: Throughout much of temperate North America
Habitat: Standing to slow-moving water, from the lowlands to mid-elevations in the mountains
Ceratophyllum echinatumspineless hornwort
Cercocarpus ledifolius
Distribution: Southeast Washington; Washington south Oregon to Arizona, east to Montana and Colorado.
Habitat: Dry areas, foothills to mid-elevations in the mountains.
var. intermontanus – birchleaf mountain-mahogany
var. ledifolius – mountain mahogany
Chaenactis douglasii
Distribution: East of the Cascade crest in Washington; British Columbia south to California, east to Rocky Mountains.
Habitat: Shrub-steppe and foothills to higher elevations in forest openings.
var. douglasii – dustymaidens, hoary false yarrow
Chaenactis thompsoniiThompson's pincushion
Distribution: Occurring primarily in the serpentine slopes of the Wenatchee Mountains in Washington.
Habitat: Open, usually rocky areas, at moderate to mid-elevations in the mountains.
Chaenorhinum minusdwarf-snapdragon
Distribution: Scattered locations on both sides of the Cascades in Washington; British Columbia south to Oregon; occurring throughout much of North America.
Habitat: Roadside, disturbed open areas, waste ground.
Chaerophyllum temulumrough chervil
Distribution: Currently known in Washington from King County area; distributed in scattered localities in northeastern North America.
Habitat: Forest edge and understory
Chamaenerion angustifoliumfireweed
Distribution: Widespread throughout Washington; Alaska south to California, east to the Atlantic Coast; circumboreal.
Habitat: Open areas, sea level to subalpine, especially in burned areas.
Chamaenerion latifoliumbroad-leaf fireweed, red willow-herb
Distribution: Occurring in most mountainous areas of Washington except the southeast corner; Alaska south to the Sierra Nevada of California, east to Montana and Colorado.
Habitat: River bars, along streams, and drier subalpine to alpine slopes.
Chelidonium majusdevil's milk, swallow wort
Distribution: Weedy introduction across southern Canada and the northern tier of states in the United States.
Habitat: Moist to dry woods, roadsides, fields, waste areas.
Chenopodium albumlambsquarters, pigweed
Distribution: Widely distributed throughout Washington; widely distributed throughout much of temperate North America.
Habitat: Widespread weed of disturbed areas, including gardens, roadsides, and waste lots.
Chenopodium atrovirenspinyon goosefoot
Chenopodium berlandieri
Distribution: Native throughout the United States and Canada
Habitat: Yards, roadsides, sandy washes.
var. zschackei – pitseed goosefoot
Chenopodium capitatum
Distribution: Occurring east of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains; east across Canada to the Upper Midwest and northeastern North America.
Habitat: Meadows, forest openings, and disturbed areas from low to moderate elevations.
var. capitatum – strawberry blight, Indian ink, Indian paint
var. parvicapitatum – Over's Goosefoot
Chenopodium chenopodioideslow goosefoot, red goosefoot
Chenopodium desiccatumnarrowleaf goosefoot
Chenopodium foliosumleafy goosefoot
Chenopodium fremontiiFremont's goosefoot
Chenopodium glaucum
Distribution: Mostly east of the Cascades in Washington, also occasional west Cascades in the Puget Trough; Alaska south to California, east across the northern half of North America to the Atlantic Coast.
Habitat: Open, sometimes disturbed, areas, often where soil is alkaline or saline.
var. glaucum – oak-leaf goosefoot
var. salinum – Rocky Mountain goosefoot
Chenopodium hiansHians goosefoot
Chenopodium leptophyllumnarrowleaf goosefoot
Distribution: East side of the Cascades, British Columbia to Baja California, east to the Mississippi Valley.
Habitat: Deserts and dry grasslands.
Chenopodium macrospermumlarge seed goosefoot
Chenopodium muralenettleleaf goosefoot, wall goosefoot, sowbane
Distribution: Introduced throughout most of North America.
Habitat: Roadsides and waste areas.
Chenopodium pratericoladesert goosefoot, narrowleaf goosefoot
Chenopodium rubrum
Distribution: Widely distributed, British Columbia to Newfoundland, south across the United States.
Habitat: Moist, saline soils.
var. humile – marshland goosefoot
var. rubrum – red goosefoot
Chenopodium ×schulzeanumhybrid goosefoot
Chenopodium simplexgiant goosefoot, maple leaf goosefoot
Distribution: Introduced in much of North America; British Columbia to California in the West.
Habitat: Weed of roadsides and waste areas.
Chenopodium strictumwhite goosefoot
Chenopodium subglabrumsmooth goosefoot
Cherleria bifloratwo-flowered sandwort
Cherleria obtusilobaalpine sandwort
Chimaphila menziesiilittle prince's-pine
Distribution: Distributed on both sides of the Cascades in Washington; British Columbia to California, east to Montana and Utah.
Habitat: Coniferous forests at moderate to mid-elevations in the mountains.
Chimaphila umbellata
Distribution: Widely distributed throughout Washington; Alaska to California, east to Montana and New Mexico, and Minnesota to Maine, south to North Carolina.
Habitat: Wooded areas, mostly coniferous, low to mid-elevations in the mountains.
ssp. umbellata – Pipsissewa, common prince's-pine
Chondrilla junceahogbite, rush skeletonweed, gum succory
Distribution: Occurring chiefly east of the Cascades in Washington; British Columbia south to California and east to Montana; also occurring in eastern North America.
Habitat: Dry, light soil, rangeland and roadsides.
Chorispora tenellacrossflower, blue mustard
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout much of western and central North America.
Habitat: Shrub-steppe habitat, both degraded and intact; disturbed areas, roadsides, and pastures.
Chorizanthe watsoniiWatson's spine-flower, five-tooth spineflower
Chrysolepis chrysophylla
Distribution: Columbia River Gorge south through western Oregon into California, where abundant; also, localities in Mason and Skamania Counties, Washington
Habitat: Dry, open to wooded areas, sea level to mid-elevations in the mountains
var. chrysophylla – chinquapin
Chrysosplenium glechomifoliumPacific golden-saxifrage, Pacific watercarpet
Distribution: West of the Cascades and mostly along the coast, British Columbia south to northwest California.
Habitat: Moist, usually swampy places, mostly at low elevations.
Chrysosplenium tetrandrumnorthern golden-saxifrage
Distribution: In Washington known only from the north-central part of the state: Alaska south to Washington, east to Montana and Colorado in the U.S., east across Canada to the Atlantic Coast; circumpolar.
Habitat: Rock crevices and wet banks and slopes, high elevations in our area.
Chrysothamnus humilisTruckee green rabbitbrush, Truckee rabbitbrush
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Idaho and Nevada.
Habitat: Shrub-steppe, grasslands, and sites with alkaline soils.
Chrysothamnus viscidiflorus
Distribution: Occurring east of the Cascades in Washington; Washington south to California, east to Montana and New Mexico.
Habitat: Shrub-steppe, dry foothills.
ssp. lanceolatus – green rabbitbrush, lanceleaf green rabbitbrush, sticky-leaf rabbitbrush, yellow rabbitbrush
ssp. viscidiflorus – sticky flowered rabbitbrush, sticky-leaf rabbitbrush, yellow rabbitbrush
Chylismia scapoidea
ssp. scapoidea – naked-stalked evening primrose
Cicer arietinumchick-pea
Distribution: Sparingly introduced in eastern Washington; scattered localities in other parts of western North America.
Habitat: Disturbed areas on the edge of or near agricultural fields.
Cichorium intybuschicory, wild succory
Distribution: Widely distributed throughout most of Washington; widely distributed throughout most of North America.
Habitat: Dry to moist soil, pastures, roadsides, and other disturbed areas.
Cicuta bulbiferabulblet-bearing water-hemlock, bulbous water-hemlock
Distribution: British Columbia to southern Oregon, east to Newfoundland and Virginia,
Habitat: Marshes, bogs, wet meadows and standing water, lowlands to mountain valleys; uncommon in the Pacific Northwest.
Cicuta douglasiiDouglas' water-hemlock, western water-hemlock
Distribution: Widely distributed throughout Washington; British Columbia south to Oregon, east to Montana.
Habitat: Marshes and wet areas, low to moderate elevations in the mountains.
Cicuta maculata
Distribution: Known from historic collections in the Spokane area; widely distributed throughout much of North America.
Habitat: Marshes and wet areas.
var. angustifolia – spotted cowbane
var. maculata – Pacific hemlock-parsley
Cimicifuga laciniatacut-leaved bugbane, Mt. Hood bugbane
Distribution: Silver Star Mountain, Skamania County, Washington and the base of Mt. Hood, Oregon.
Habitat: Moist woods at moderate elevations.
Cinna latifoliaslender wood-reed
Distribution: Alaska to Newfoundland, south on both sides of the Cascades, Washington to California, east to Colorado; also Minnesota to Maine, south to Tennessee
Habitat: Moist woods and meadows, sea level to subalpine
Circaea alpinaenchanter's nightshade
Distribution: Both sides of the Cascades in Washington; Alaska to Newfoundland, south (mostly in the mountains) to California and Georgia.
Habitat: Cool, damp woods, low to mid-elevations in the mountains.
Cirsium arvenseCanada thistle, Canadian thistle, creepiing thistle
Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Noxious weed that thrives in a variety of habitats.
Cirsium brevifoliumPalouse thistle
Distribution: Southeast Washington, northeast Oregon and adjacent Idaho
Habitat: Grasslands at low elevations
Cirsium brevistylumclustered thistle, short styled thistle
Distribution: British Columbia to northern California, east to Montana
Habitat: Moist places at low to moderate elevations in the mountains
Cirsium edule
Distribution: British Columbia to Oregon, from the coast to the east slope of the Cascades
Habitat: In forest openings from low elevations near the coast to mid-elevations in the mountains
var. edule – edible thistle, Indian thistle
var. macounii – Macoun's thistle
var. wenatchense – Wenatchee thistle
Cirsium flodmaniiFlodman's thistle
Cirsium foliosumleafy thistle
Cirsium hookerianumHooker's thistle, white thistle
Distribution: East of the Cascades, British Columbia and Washington, east to Alberta and Montana
Habitat: Moist lowlands, open slopes and fields
Cirsium inamoenum
var. inamoenum – Greene’s thistle
Cirsium remotifolium
var. remotifolium – fewleaf thistle, remote-leaved thistle
Cirsium scariosumelk thistle, meadow thistle
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Moist meadows in the foothills to fairly high elevations in the mountains.
Cirsium undulatumwavy leaf thistle
Distribution: East of the Cascades in Washington; British Columbia south to California, east to Michigan and Texas.
Habitat: Dry hillsides and plains at low elevations.
Cirsium vulgarebull thistle, common thistle
Distribution: Widely distributed throughout Washington; widely distributed throughout the United States and Canada.
Habitat: Common weed from the lowlands to logged areas in the mountains.
Citrullus lanatuswatermelon
Clarkia amoena
Distribution: Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; British Columbia south to California.
Habitat: Dry, open to wooded areas, at low elevations.
var. caurina – yellow clarkia, farewell to spring
var. lindleyi – yellow clarkia, farewell to spring
Clarkia gracilis
Distribution: Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; Washington south to California.
Habitat: Fairly dry, open areas at low elevations.
ssp. gracilis – slender godetia
Clarkia pulchelladeer horn, pinkfairies, ragged robin
Distribution: Chiefly east of the Cascades in Washington; British Columbia to Oregon, east to South Dakota.
Habitat: Dry, open slopes, low to mid-elevations.
Clarkia purpurea
Distribution: Occurring on both sides of the Cascades crest in Washington; Washington south to California and Arizona.
Habitat: Dry, open ground, often at the edge of vernal pools.
ssp. quadrivulnera – four-spot
Clarkia rhomboideacommon clarkia, diamond fairyfan
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California and Arizona, east to Idaho, Montana, Utah, and Nevada.
Habitat: Dry, often sandy soil in forest openings at low to moderate elevtions.
Claytonia arenicolasand montia, sand springbeauty montia
Distribution: Occurring along the eastern border in Washington; Washington south to Oregon, east to Idaho.
Habitat: Various habitats, from moist rocks to hillsides to pine woods.
Claytonia cordifoliabroadleaf springbeauty, heart-leaf springbeauty
Distribution: Occurring on both sides of the Cascades crest in Washington;
Habitat: On wet soil, usually along streams, moderate to mid-elevations in the mountains.
Claytonia exigua
Distribution: Southern B.C. to California, east to eastern Washington and Oregon, part of Nevada.
Habitat: Open areas on rock, clayey soils, or sand.
ssp. exigua – Claytonia, pale springbeauty Claytonia
ssp. glauca – pallid Claytonia
Claytonia lanceolatalanceleaf springbeauty
Distribution: Widely distributed on both sides of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Sagebrush foothills to alpine slopes, usually where vernally moist.
Claytonia megarhizafell-fields Claytonia
Distribution: Occurring in the Wenatchee Mountains of Washington; in scattered locations from Northwest Territories south to California, east to the Rocky Mountains.
Habitat: Gravelly soil and talus slopes, mid- to high elevations in the mountains.
Claytonia multiscapaRydberg's springbeauty
Distribution: Occurring west of the Cascades crest in Washington; in scattered locations from British Columbia south to Washington; east to Idaho, Montana, and Wyoming.
Habitat: Coniferous forests and forest openings where moist.
ssp. pacifica – Rydberg's springbeauty
Claytonia parviflora
Distribution: Occurring on both sides of the Cascades in Washington; southern British Columbia to California, east to Montana, Idaho, Nevada, Arizona, and Utah.
Habitat: Open rocky areas, open forest, forest edge, and disturbed areas.
ssp. parviflora – Indian lettuce
Claytonia perfoliata
Distribution: Widely distributed throughout Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Forest openings and margins, shaded rock crevices, and open areas where seasonally moist from the coast to middle elevations in the mountains.
ssp. intermontana – intermountain miners lettuce
ssp. perfoliata – miners lettuce
Claytonia rubra
Distribution: Throughout much of Western U.S., north to southern B.C.
Habitat: Sandy areas, shrublands, dry coniferous woods
ssp. depressa – cushion miner's lettuce
ssp. rubra – erubescent lettuce, red miners lettuce
Claytonia sibiricacandy flower, Siberian springbeauty
Distribution: Distributed on both sides of the Cascades in Washington; Alaska to California, east to Montana and Utah.
Habitat: Moist, usually shady places, lowlands to mid-elevations in the mountains.
Claytonia umbellataGreat Basin springbeauty
Claytonia washingtonianaLake Washington Claytonia
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to Oregon.
Habitat: Coastal bluffs and coniferous forests at low elevations, typically where moist.
Clematis hirsutissima
Distribution: Occurring in only a few counties in central and eastern Washington; Washington south to Oregon, east to Montana, south to Arizona and New Mexico.
Habitat: Meadows, grasslands, and forest openings.
var. hirsutissima – Douglas' clematis
Clematis ligusticifoliawestern clematis
Distribution: Chiefly east of the Cascades crest in Washington; British Columbia south to California, east to Oklahoma and the Dakotas.
Habitat: River valleys and sagebrush desert to ponderosa pine forests.
Clematis occidentalis
Distribution: East of the Cascades in Washington; British Columbia south to Oregon, east to Saskatchewan and Wyoming.
Habitat: Often in deep, fine soils in shady forest, also in cliffs and other rocky sites in open woods and thickets, at moderate to high elevations in the mountains.
var. dissecta – Columbia clematis
var. grosseserrata – Columbia virgin's bower, Columbia clematis
Clematis vitalbatraveler's-joy
Distribution: Established chiefly west of the Cascades in Washington; British Columbia south to California, scattered locations in eastern North America.
Habitat: Waste land.
Clinopodium douglasiiOregon-tea
Distribution: Chiefly west of the Cascade summits in Washington; Alaska south to California, east to Idaho and Montana.
Habitat: Coniferous woods, sea level to mid-elevations in the mountains.
Clinopodium vulgarewild basil
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to Oregon, east across North America in scattered states and provinces.
Habitat: Disturbed areas at low elevation.
Clintonia uniflorabride's-bonnet, queen's cup
Distribution: Occurring in forested areas throughout Washington; Alaska south to California, east to Montana.
Habitat: Moist coniferous forests, from the foothills to fairly high elevations in the mountains
Cochlearia groenlandicaDanish scurvygrass, Danish scurvygrass; scurvy-grass; spoonwort
Coeloglossum viridefrog-orchis, Frog-orchis, long-bracted orchid
Distribution: Known only from Okanogan County in Washington; Alaska south to Washington, east across the southern half of Canada to the Atlantic Coast; south in the Rocky Mountains to New Mexico; east from the upper Midwest to the northeastern U.S., south in the Appalachian Mts.
Habitat: Moist to wet meadows at moderate elevations.
Coix lacryma-jobiJob's-tears
Colchicum autumnaleautumn crocus
Distribution: Known from Pierce County in Washington; not reported for elsewhere in North America.
Habitat: Lowland grassy meadows, escaping or persisting from cultivation.
Coleanthus subtilismoss grass
Collinsia grandiflorablue-lips blue-eyed Mary, large-flowered blue-eyed Mary
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California, east in the Columbia River Gorge.
Habitat: Open, moist to rather dry areas, low to moderate elevations in the mountains.
Collinsia parviflorasmall-flower blue-eyed Mary
Distribution: Widely distributed throughout Washington; Alaska south to California and Colorado, east to Ontario and Michigan.
Habitat: Lowlands to alpine meadows in vernally (springtime) moist areas.
Collinsia rattaniirattan collinsia, Rattan collinsia
Distribution: West of the Cascades in southern Washington, through the Columbia River Gorge to the John Day valley in Oregon.
Habitat: Open woods at low elevations.
Collinsia sparsiflora
Distribution: Chiefly along the Columbia River Gorge in Washington; Washington south to northern Oregon, east to western Idaho.
Habitat: Open slopes and swales.
var. bruceae – few-flowered blue-eyed Mary
Collomia debilis
Distribution: Occurring in the Olympic and Cascade Mountains of Washington; Washington south to Oregon, east to Idaho.
Habitat: Shifting talus slopes at high elevations in the mountains.
var. debilis – alpine collomia
Collomia grandifloralarge-flowered collomia, large-flower mountain-trumpet
Distribution: Widely distributed on both sides of the Cascades crest in Washington; British Columbia to California, east to Wyoming.
Habitat: Rather dry, open to lightly wooded areas, lowlands to moderate elevations in the mountains.
Collomia heterophyllavaried-leaf collomia, variable-leaf mountain-trumpet
Distribution: Occurring mostly west of the Cascades in Washington; British Columbia south to California, east to Idaho.
Habitat: Woods, forest openings and stream banks, low to moderate elevations in the mountains.
Collomia larseniiLarsen's alpine collomia, talus collomia
Distribution: Occurring in the Olympic and Cascade Mountains in Washington; Washington south to California.
Habitat: Rocky, often moist slopes at high elevations in the mountains.
Collomia linearisnarrow-leaf collomia, narrow-leaf mountain-trumpet
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia south to California, east to Ontario and New Mexico.
Habitat: Dry to somewhat moist, open or lightly shaded areas in the lowlands to moderate elevations in the mountains.
Collomia macrocalyxbristle-flowered collomia, bristle-flower mountain-trumpet
Collomia tenelladiffuse collomia, diffuse mountain-trumpet
Distribution: Mostly east of the Cascades in Washington; British Columbia south to Nevada, east to Idaho, Utah and Wyoming.
Habitat: Dry, open places from the plains to moderate elevations in the mountains.
Collomia tinctoriayellow-staining collomia, yellow-staining mountain-trumpet
Distribution: Occurring east of the Cascades in Washington; Washington south to California, east to central Idaho and southeast Oregon.
Habitat: Dry, open places in the foothills to moderate or mid-elevations in the mountains.
Columbiadoria halliiColumbia River daisy, Hall's goldenweed
Distribution: Occurring in the south-central region of Washington; Washington south to Oregon.
Habitat: Dry, open or sparsely wooded slopes.
Colutea arborescensbladder-sennas
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east across the southwest to the Great Plains; northeastern North America.
Habitat: Disturbed areas in including wastelots, roadsides, and fields.
Comandra umbellata
Distribution: Occurring east of the Cascades crest in Washington; widely distributed throughout North America.
Habitat: Dry to moist-but-sandy soil, sea level to subalpine; common in the shrub-steppe.
var. californica – bastard toad flax
var. pallida – bastard toad flax
Comarum palustremarsh cinquefoil, purple marshlocks
Distribution: Widely distributed throughout much of Washington; Alaska east across Canada to the Atlantic Coast, south to California and east across the northern half of the U.S.
Habitat: Bogs, wet meadows and lake margins, sea level to subalpine.
Comastoma tenellumSamiland gentian, Lapland gentian [IMF4], slender gentian [VPBC2]
Distribution: Known only from Okanogan County in Washington; Alaska south to California, east to the northern Rocky Mountains; circumpolar.
Habitat: Alpine areas, typically where moist.
Commelina communis
Distribution: Widely introduced in eastern United States; occasional in Washington.
Habitat: Weed of waste places, field edges and marshes.
var. communis – Asiatic dayflower
Conioselinum pacificum
Distribution: West of the Cascades in Washington along the coast; Alaska and the Aleutian Islands, south to California.
Habitat: Bluffs and rocky or sandy beaches along the seashore.
Conium maculatumpoison-hemlock
Distribution: Widely distributed throughout Washington; widely distributed throughout North America
Habitat: Disturbed areas in moist soil.
Conringia orientalishare's-ear mustard, treacle mustard
Distribution: In scattered locations across Washington; distributed throughout much of North America.
Habitat: Roadsides and waste places.
Consolida ajacisdoubtful knight's-spur
Distribution: Limited in distribution to a few localities west of the Cascades in Washington; widely distributed throughout much of North America.
Habitat: Drainage ditches, roadsides, old home sites, waste areas.
Convolvulus arvensisfield bindweed
Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Cultivated fields, roadsides, open areas, and other disturbed sites.
Convolvulus sepiumhedge bindweed, lady's nightcap
Distribution: Disturbed areas, both sides of the Cascades; temperate regions worldwide.
Habitat: Disturbed areas, particularly in association with agriculture.
Convolvulus silvaticuslarge bindweed, shortstalk false bindweed
Convolvulus soldanellaseashore false bindweed, beach morning glory, beach morning-glory, seaside morning-glory
Distribution: Along the coast in Washington; British Columbia south to San Diego County, California.
Habitat: Coastal beaches and sand dunes, often extending down to the high tide level.
Conyza bonariensisSouth American conyza
Distribution: Introduced from Oregon through Arizona and Texas to Florida
Habitat: Occasionally escapes from cultivation
Conyza canadensisCanadian fleabane, horseweed
Distribution: Common introduction throughout the United States and Canada
Habitat: Weed of roadsides, dry or moist disturbed ground
Conyza sumatrensisasthmaweed
Coptis aspleniifoliafern-leaf goldthread
Distribution: Alaska to Vancouver Island, British Columbia, and in Whatcom, Jefferson and Snohomish Counties, Washington
Habitat: Moist woods and bogs
Coptis laciniataOregon goldthread
Distribution: Occurring in the southwestern region of Washington; Washington south to California.
Habitat: Moist woods at low elevations.
Coptis occidentalisIdaho goldthread
Distribution: Northeast Washington and adjacent British Columbia, east to Idaho and Montana
Habitat: Moist woods
Corallorhiza maculata
Distribution: Widely distributed throughout Washington; British Columbia east to Newfoundland, south to California and North Carolina.
Habitat: Moist to rather dry woods, low to mid-elevations in the mountains.
var. maculata – spotted coralroot
var. occidentalis – western spotted coralroot
var. ozettensis – ozette coralroot
Corallorhiza mertensianaPacific coralroot, western coralroot
Distribution: Occurring on both sides of the Cascades in Washington; Alaska south to California, east to Montana and Wyoming.
Habitat: Usually in moist coniferous forests, low to mid-elevations in the mountains.
Corallorhiza striata
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia south to California, east across the northern half of North America to the Atlantic coast.
Habitat: Moist humus in shady coniferous and deciduous forests, low to mid-elevations.
var. striata – hooded coralroot, striped coralroot
var. vreelandii – vreeland's striped coralroot
Corallorhiza trifidaearly coralroot, northern coralroot
Distribution: Occurring on both sides of the Cascades in Washington; Alaska south to California, east to the Atlantic Coast throughout the northern half of North America.
Habitat: Fairly deep, moist woods, montane to subalpine in the Pacific Northswest.
Cordylanthus capitatusYakima bird's-beak
Distribution: East of the Cascade crest in Washington; Idaho and Montana south to California and Nevada.
Habitat: Dry, open woods and hillsides, often with sagebrush, moderate to mid-elevations.
Coreopsis lanceolatalance-leaved tickseed
Coreopsis tinctoriacalliopsis, Columbia coreopsis, golden tickseed
Distribution: Occurring chiefly east of the Cascades crest in Washington; widely distributed throughout North America except at northernmost latitudes.
Habitat: Open and disturbed areas at low to mid elevations where seasonally moist.
Corispermum americanum
var. americanum – American bugseed
Corispermum hookeri
var. pseudodeclinatum – Hooker's bugseed
Corispermum pacificumPacific bugseed
Distribution: Occurring along the Lower Columbia River and east of the Cascades in Washington; central Washington south to northern Oregon, e to western Idaho.
Habitat: Roadsides and waste places.
Corispermum pallasiiPallas' bugseed
Corispermum pallidumpale bugseed
Corispermum villosumhairy bugseed
Cornus nuttalliimountain dogwood, Nuttall's dogwood, Pacific dogwood, western flowering dogwood
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho.
Habitat: Open to rather dense damp forests, often along streams.
Cornus sericea
Distribution: Widely distributed throughout Washington; occurring in much of temperate North America.
Habitat: Moist soil, especially along streams, low to mid-elevations.
ssp. occidentalis – creek dogwood, western red osier
Cornus unalaschkensiswestern bunchberry
Distribution: Widely distributed on both sides of the Cascades in Washington; Alaska, much of Canada, and the northern tier of states in the United States.
Habitat: Moist woods, low to mid-elevations.
Corrigiola litoralis
Distribution: Southern British Columbia south to Oregon; also in Maryland.
Habitat: Lake and pond margins, often where disturbed.
ssp. litoralis – strapwort
Cortaderia jubatapurple pampas grass
Distribution: Occurring in lowland western Washington; Washington to California.
Habitat: Disturbed, open areas at low elevation
Cortaderia selloanapampas grass
Distribution: Occurring in several counties west of the Cascades crest; Washington to California, in scattered states eastward to Atlantic Coast.
Habitat: Disturbed, open soil of wastelots, abandoned fields, and roadsides at low elevations, often near coast.
Corydalis aquae-gelidaemarsh corydalis
Distribution: In the Cascades in Clackamas and Multnomah Counties, Oregon
Habitat: Wet places of shaded forests.
Corydalis aurea
Distribution: Occurring chiefly east of the Cascades in Washington; widely distributed throughout much of North America except southeastern U.S.
Habitat: In varied habitats, from moist to dry and well-drained soil.
ssp. aurea – golden corydalis, scrambled eggs
Corydalis scouleriScouler's fumewort
Distribution: West of the Cascades, British Columbia to northern Oregon
Habitat: Moist soil in shade, low elevations, from the coast to the foothills
Corylus avellanacommon filbert, European hazelnut
Distribution: Widely planted as an ornamental and occasionally naturalizing in western Washington lowlands; British Columbia south to Oregon.
Habitat: Abandoned plantings, roadsides, waste sites, forest edge.
Corylus cornuta
Distribution: Widespread in North America from British Columbia to Newfoundland, south to California, Colorado, Missouri, Ohio, and Georgia. In WA on both sides of the Cascades, and in the eastern portion of the state.
Habitat: Forest edge and openings, thickets, and rocky slopes at low to middle elevations.
var. californica – California hazel
var. cornuta – beaked hazel
Corynephorus canescensgray club-awn grass
Cota austriacaAustrian chamomile
Distribution: Known only from near Pullman in Whitman County.
Habitat: Disturbed areas, fields, roadsides.
Cota tinctoriagolden chamomile, yellow chamomile, golden marguerite, Golden marguerite
Distribution: In scattered locations in Washington; widely distributed across northern half of North America.
Habitat: Disturbed areas, often where dry.
Cotoneaster dammeribearberry cotoneaster
Cotoneaster dielsianusDiel's cotoneaster
Cotoneaster divaricatusspreading cotoneaster
Cotoneaster franchetiifranchet's cotoneaster, orange cotoneaster
Distribution: Distributed west of the Cascades in Washington; Washington south to California
Habitat: Lowland forest edges, grassy balds, disturbed areas.
Cotoneaster gambleitree cotoneaster
Cotoneaster horizontalisrock cotoneaster, rockspray cotoneaster, wall cotoneaster
Distribution: Occurring west of the Cascades crest at low elevations in Washington; British Columbia south to Oregon; also in Ontario, Canada.
Habitat: Fields, forest openings, and disturbed areas typically at low elevations.
Cotoneaster lacteuslate cotoneaster, milk-flower cotoneaster
Distribution: Occurring in lowland western Washington; British Columbia to California.
Habitat: Disturbed areas, thickets, and forest margins.
Cotoneaster lucidusshiny cotoneaster
Cotoneaster nitensfew-flowered cotoneaster
Cotoneaster rehderibullate cotoneaster, puckered-leaf cotoneaster
Cotoneaster salicifoliuswillow-leaved cotoneaster
Cotoneaster simonsiiHimalayan cotoneaster, Simon's cotoneaster
Cotoneaster tengyuehensisTengyueh cotoneaster
Cotula coronopifoliabrass buttons, common brass buttons
Distribution: Introduced along the coast of the Pacific states, occasionally inland
Habitat: Chiefly in tidal flats; occasionally in other moist areas
Crassula aquaticawrinkle-seed pygmyweed, water pygmy weed
Distribution: Occurring in scattered localities across Washington; Alaska south to California, east to the Rocky Mountains, and in the southeastern and northeastern regions of North America.
Habitat: Mud flats and vernal pools.
Crassula connatapygmy weed
Distribution: Known in Washington only from San Juan County; British Columbia south to California, east to Arizona and Texas.
Habitat: Sandy areas, paths and roadsides.
Crassula solierismooth-seed pygmyweed
Crassula tillaeamossy stonecrop
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California.
Habitat: Disturbed areas, rock crevices, and sandy areas, often where seasonally wet or moist.
Crataegus castlegarensisCastlegar hawthorn
Crataegus chrysocarpafireberry hawthorn, Piper's hawthorn
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east to the Atlantic.
Habitat: Thickets, dry slopes, shrub-steppe, riparian zones, open forests.
Crataegus douglasiiblack hawthorn, Douglas' hawthorn
Distribution: Both sides of the Cascades, Alaska to California, east to Utah and Wyoming, and across the northern states to Michigan
Habitat: Moist to dry areas, lowlands to moderate elevations
Crataegus gaylussaciahuckleberry hawthorn, Suksdorf hawthorn, Suksdorf's hawthorn
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east to Montana and Idaho.
Habitat: Openings and forest margins at low to moderate elevations.
Crataegus laevigatamidland hawthorn, woodland hawthorn
Crataegus macracanthalarge-thorned hawthorn, western large-thorned hawthorn
Crataegus monogyna
var. monogyna – common hawthorn, English hawthorn, one-seeded hawthorn
Crataegus okanaganensisOkanagan hawthorn
Crataegus okennoniiO'Kennon's hawthorn
Crataegus phaenopyrumWashington thorn
Crataegus phippsiiPhipps\\\' hawthorn
Crepis acuminatalong leaved hawksbeard, tapertip hawksbeard
Distribution: East of the Cascades, Washington to California, east to Montana and New Mexico.
Habitat: Dry, open places from the foothiils to moderate elevations in the mountains.
Crepis atribarbaslender hawksbeard
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to Nevada, east to the Great Plains of Canada and the U.S.
Habitat: Dry, open places, foothills to moderate elevations in the mountains.
Crepis bakeri
Distribution: East slope of the Cascades, from central Washington to central California.
Habitat: Dry, open slopes in the foothills and at moderate elevations in the mountains.
ssp. bakeri – Baker's hawksbeard
Crepis barbigerabearded hawksbeard
Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington south to Oregon, east to Idaho.
Habitat: Dry, open areas in the plains and foothills.
Crepis capillarissmooth hawksbeard
Distribution: Occurring chiefly west of the Cascades in Washington; widely distributed throughout much of North America.
Habitat: Disturbed soil at lower elevations.
Crepis intermediagray hawksbeard intermediate hawksbeard, limestone hawksbeard
Distribution: British Columbia to California, east to Montana and Arizona
Habitat: Somewhat moist to dry open areas, foothills to moderate elevations
Crepis modocensis
Distribution: East of the Cascades in Washington; British Columbia south to Oregon.
Habitat: Common in shrub-steppe, sagebrush, and forest openings.
ssp. modocensis – low hawksbeard, Modoc hawksbeard
Crepis nanalow hawksbeard
Distribution: Occurring in the Olympic and Cascades mountains in Washington; Alaska to California, east to Nunavut, Alberta, Montana, Wyoming, and CO; northeastern North America; Asia.
Habitat: Uncommon above timberline in the mountains.
Crepis nicaeensisFrench hawksbeard, Turkish hawksbeard
Crepis occidentaliswestern hawksbeard
Distribution: Occurring chiefly east of the Cascades crest in Washington; southern British Columbia to California, east to the Great Plains of Canada and the U.S.
Habitat: Dry, open places, mostly in the foothills and plains.
Crepis pleurocarpanaked stemmed hawksbeard
Distribution: In eastern portion of Washington; south to California, east to Idaho and Nevada.
Habitat: Stream banks in mixed conifer forests, road cuts, and rocky, serpentine soils.
Crepis runcinata
ssp. hispidulosa – meadow hawksbeard
ssp. runcinata – dandelion hawksbeard
Crepis setosabristly hawksbeard, rough hawksbeard
Distribution: West of the Cascades in Washington, south to California
Habitat: Disturbed areas at low elevation
Crepis tectorumannual hawksbeard, narrow leaf hawksbeard, rooftop hawksbeard
Distribution: Introduced from Alaska to California, and across much of the northern half on the United States
Habitat: Uncommon in lawns and wastelands
Crocidium multicaulespring gold, gold star
Distribution: Occurring on both sides the Cascades crest in Washington; British Columbia south to California, east to Idaho.
Habitat: Dry, open areas at low elevations, especially shrub-steppe.
Crocus ×stellarisyellow crocus
Crocus tommasinianusearly crocus
Crocus vernus
ssp. vernus – spring crocus
Croton setigerdoveweed, turkey mullein, fish poison
Distribution: East of the Cascades crest in Washington; Washington south to Baja California.
Habitat: Chiefly in semi-desert conditions, but to the coast in California.
Cruciata pedemontana
Distribution: Occurring in Washington at scattered locations on both sides of the Cascades; Washington south to Oregon, east to Montana; in central and southeastern regions of the U.S.
Habitat: Disturbed sites, roadsides, waste areas at low elevations.
Crupina vulgarisbearded creeper, crupina
Distribution: Introduced in Idaho and Chelan County, Washington
Habitat: Weed or fields and roadsides
Crypsis alopecuroidesfoxtail pricklegrass
Distribution: Occurring in the south-central areas of Washington;
Habitat: Sandy soils around drying lake margins and other seasonally moist, disturbed, open areas.
Crypsis vaginifloramodest pricklegrass
Cryptantha affiniscommon cryptantha, slender cryptantha, quill cat's eye
Distribution: East of the Cascades in Washington; British Columbia south to California, east to Rocky Mountains and South Dakota.
Habitat: Open areas from sagebrush to coniferous forests at moderate elevations.
Cryptantha ambiguaobscure cryptantha, wilke's cryptantha, basin cat's eye
Distribution: Occurring on both sides of the Cascades in Washington; southern British Columbia, east to western Montana and south to California and Colorado.
Habitat: Dry, open places from the lowlands to moderate elevations in the mountains.
Cryptantha celosioidesbuttecandle, northern cryptantha, cockscomb oreocarya, Sheldon's oreocarya
Distribution: Chiefly east of the Cascades, from southern British Colombia to Grant County, Oregon, east to North Dakota.
Habitat: Dry, open places in the valleys, plains and foothills, occasionally higher.
Cryptantha circumscissacushion cryptantha, matted cryptantha
Distribution: Chiefly east of the Cascades, central Washington to Baja California, east to Utah.
Habitat: Dry, open, usually sandy places in the lowlands.
Cryptantha fendleriFendler's cryptantha, sand dune cat's eye
Cryptantha flaccidaflaccid cryptantha, weakstem cat's eye
Distribution: Central and southeast Washington, south to southern California, and along the western border of Idaho.
Habitat: Dry, open slopes and flats at lower elevations.
Cryptantha gracilisnarrow-stem cryptantha
Cryptantha grandifloralarge-flowered cryptantha
Cryptantha intermediacommon cryptantha, Clearwater cat's eye
Distribution: Washington to California, east to Idaho and Arizona
Habitat: Moderately dry, open slopes
Cryptantha leucophaeagray cryptantha, gray cat's eye
Distribution: Along the Columbia and lower Yakima rivers, from Wenatchee, Washington to the Dalles, Oregon.
Habitat: Dry, usually sandy places at low elevations.
Cryptantha pterocaryawingnut cryptantha
Distribution: East of the Cascades in Washington; Washington south to California, east to Idaho, Colorado and Texas.
Habitat: Dry, open, often sandy areas of sagebrush and grasslands.
Cryptantha rostellatabeaked cryptantha
Cryptantha scopariadesert cryptantha, pinyon desert cat's eye
Distribution: Common on the Snake River plains of Idaho, extending into adjacent Oregon, northeast Nevda and southwest Wyoming; adjunct to Yakima County, Washington, and adjacent counties.
Habitat: Dry, open slopes in the valleys, plains and foothills, common among sagebrush.
Cryptantha simulanspinewoods cryptantha, pinewoods cat's eye
Cryptantha spiculiferaSnake River cryptantha, Snake River cat's eye
Distribution: Occurring east of the Cascades crest in Washington; Washington south to Oregon and Nevada, east to Idaho, Montana, Wyoming, and Utah.
Habitat: Dry, open slopes and flats in the plains, valleys and foothills.
Cryptantha thompsoniiThompson's cryptantha, Thompson's cat's eye
Distribution: Serpentine soils in the Wenatchee Mountains and adjacent Cascades of Washington
Habitat: Moderate to mid-elevations in the mountains
Cryptantha torreyanaTorrey's cryptantha, Torrey's cat's eye
Distribution: Widely distributed east of the Cascades in Washington; British Columbia to Oregon, east to Montana.
Habitat: Open areas, low to mid-elevations in the mountains.
Cryptantha watsoniiWatson's cryptantha, Watson's cat's eye
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Open hillsides, sagebrush-steppe plains, and forest openings at low to middle elevations.
Cryptogramma acrostichoidesAmerican parsley fern rockbrake
Distribution: Alaska to California, east in cool, moist areas to Ontario and Michigan
Habitat: Cliff crevices and talus slopes at mid- to high elevations in the mountains
Cryptogramma cascadensisCascade parsley fern rockbrake
Distribution: British Columbia to California, east to Idaho and Montana
Habitat: Cliff crevices and talus slopes at mid- to high elevations in the mountains, occasionally descending to sea level in humid areas
Cryptogramma stellerifragile rockbrake, slender rockbrake, Steller's rockbrake
Cuscuta approximataalfalfa dodder
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Great Plains.
Habitat: Agricultural fields, often on alfalfa, and other disturbed, open areas.
Cuscuta californica
var. californica – California dodder
Cuscuta campestrisfield dodder
Cuscuta cephalanthibuttonbush dodder
Cuscuta denticulatadesert dodder
Distribution: Central Washington; south to Baja California, east to Colorado.
Habitat: Parasitic on shrubs in arid shrub-steppe communities.
Cuscuta epilinumflax dodder
Cuscuta epithymum
var. epithymum – clover dodder, thyme dodder
Cuscuta occidentaliswestern dodder
Distribution: In most Western states, Washington to California, east to Colorado.
Habitat: Found on many different hoasts.
Cuscuta pacificasalt marsh dodder
Distribution: British Columbia to Baja California.
Habitat: Coastal marshes and saltwater tideflats.
Cuscuta pentagonafield dodder, five-angled dodder
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout North America.
Habitat: Parasitic on a variety of hosts.
Cuscuta plattensisprairie dodder
Cuscuta suksdorfiimountain dodder
Distribution: Southern Washington to the southern Sierra Nevada, California, at medium to high elevations.
Habitat: On Aster, Spraguea, and other hosts.
Cusickiella douglasiialkali false whitlow-grass, Douglas' whitlow-grass
Distribution: Occurring in the south-central area of Washington along the Oregon border; Washington south to California, east to Idaho, Nevada, and Utah.
Habitat: Open, rocky ridges of the sagebrush desert, up into the lower mountains.
Cyclachaena xanthiifoliacarelessweed, burweed marsh elder, tall marsh elder
Distribution: Eastern Washington south to New Mexico, east to Alberta and Texas.
Habitat: Bottom land and moist waste places.
Cymbalaria muralisKenilworth-ivy, ivy-leaved toadflax
Distribution: Introduced west of the Cascades, British Columbia to Oregon
Habitat: Wasteland,disturbed soil
Cymopterus terebinthinus
Distribution: East of the Cascades in Washington; Washington to Oregon, east to Montana and Utah.
Habitat: Shrub-steppe habitat, often in dry, cobbly streambeds, steep slopes, sandy soils, and other drought-stressed sites.
Cynodon dactylonbermuda grass
Distribution: Common in the warmer portion of the United States, California to Florida; occasional in the Pacific Northwet.
Habitat: A weed of lawns, partures and railroad tracks.
Cynoglossum officinalegypsy flower, common hound's tongue
Distribution: Occurring east of the Cascades crest in Washington; ntroduced in much of North America.
Habitat: Noxious weed of roadsides and disturbed areas.
Cynosurus cristatuscrested dogtail
Distribution: Introduced in scattered locations west of the Cascades in Washington and Oregon, and in California and Idaho.
Habitat: Waste places, old meadows, roadsides.
Cynosurus echinatusbristly dog's-tail grass
Distribution: Introduced in southwest British Columba and Oregon\'s Wilamette Valley, south into California; more common in central and eastern United States.
Habitat: Weed of waste places.
Cyperus acuminatussharp-pointed flatsedge, taper-tip flatsedge
Cyperus bipartitusshining flatsedge
Distribution: Occurring on both sides of the Cascades crest in Washington; widespread in North America.
Habitat: Streambanks and other wet places in the valleys and lowlands; tolerant of alkali.
Cyperus eragrostistall flatsedge
Distribution: British Columbia south to California, east to New Jersey and South Carolina.
Habitat: Damp grasslands and roadside ditches at low elevations.
Cyperus erythrorhizosredroot flatsedge
Distribution: Widespresd in the United Stated and adjacent Canada.
Habitat: Streambanks and other wet places in the valleys and lowlands.
Cyperus esculentus
Distribution: Widely distributed throughout Washington; widespread throughout North America.
Habitat: Moist, low ground along streams and ditches, but sometimes in drier ground.
var. leptostachyus – yellow nutgrass
Cyperus fuscusbrown galingale
Cyperus lupulinus
Distribution: Great Plains to northeastern United States; occasional in the Pacific Northwest.
Habitat: Wet areas.
ssp. lupulinus – Great Plains flatsedge
Cyperus odoratusscented flatsedge
Cyperus schweinitziisand flatsedge
Cyperus squarrosusawned flatsedge
Distribution: Widespread in the United States and Europe.
Habitat: Wet places in the valleys and lowlands.
Cyperus strigosusfalse flatsedge, straw-colored flatsedge
Distribution: Widespread in the United States and adjacent Canada.
Habitat: Wet places, along the banks of large streams, in the valleys and lowlands.
Cypripedium ×columbianaColumbia lady's-slipper, hybrid lady's-slipper
Cypripedium fasciculatumclustered lady's-slipper
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to Santa Cruz County, California, east to Idaho and Colorado.
Habitat: Moist to rather dry and rocky, open coniferous forests.
Cypripedium montanummountain lady's-slipper
Distribution: Chiefly east of the Cascades crest in Washington; Alaska south to California, east to Montana and Wyoming.
Habitat: Dry to moist open woods, low to mid-elevations in the mountains.
Cypripedium parviflorumfairy slipper, yellow lady's-slipper slipper
Distribution: Occurring east of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains; throughout most of Canada and the central, southeastern, and northeastern regions of the U.S.
Habitat: Bogs and damp woods.
Cystopteris fragilisbladder fern, brittle fern, fragile fern
Distribution: Widespread in North America and common in the Pacific Northwest
Habitat: Moist to moderately dry, often rocky places, lowlands to above timberline
Cytisus multiflorusportuguese broom, white Spanish broom
Cytisus scopariusScot's broom
Distribution: Distributed widely throughout much of Washington, especially in lowlands west of the Cascades crest; British Columbia south to California.
Habitat: Widespread noxious weed, usually where somewhat moist.