Vascular Plants

Includes all flowering plants, conifers, ferns and fern-allies.

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Common names beginning with C:
499 common names
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Index to common names:
cabbage, cactus, California, California-tea, calliopsis, camas, camelthorn, campion, Canadian, canary-broom, cancerwort, candle, candyflower, candystick, candytuft, cap, caraway, carelessweed, carpetweed, carrot, cascara, cat-tail, catchfly, catchweed, catnip, cats-ear, cattail, ceanothus, cedar, celandine, celery, centaury, cerastium, chaenactis, chaffweed, chain-tree, chamomile, Charlie, charlock, checker-mallow, checkerbloom, cheeseweed, cherry, cherry-laurel, chervil, chess, chick-pea, chickenclaws, chickweed, chicory, Chinese, chinquapin, chives, chokeberry, chokecherry, chucklusa, cinquefoil, clarkia, clary, Claytonia, claytonia, cleareye, cleavers, clematis, cliff-brake, cliff-fern, cliffbrake, clotbur, cloudberry, clover, clover-fern, club, clubmoss, clubrush, coast, cobraplant, cock's-head, cocklebur, cockleburr, codlins-and-cream, coldenia, collinsia, collomia, coltsfoot, columbine, combleaf, combseed, come, comfrey, compassplant, coneflower, coneplant, conyza, coolwort, coon's-tail, copperbush, coral-root, coraldrops, coralroot, cordgrass, coreopsis, corn, cornbind, corncockle, cornel, cornflower, cornsalad, corydalis, costmary, cotoneaster, cotton, cotton-grass, cottongrass, cottonrose, cottonweed, cottonwood, cous, cow-parsnip, cow-poison, cowcockle, crabapple, crabgrass, cranberry, crane's-bill, cranes-bill, cranesbill, crazyweed, creeper, creeping-glow-wort, creeping-Jenny, creeping-snowberry, cress, crinklemat, crocus, cross, crossflower, crowberry, crowfoot, crown, crown-vetch, crumbweed, crupina, cryptantha, cuckoo flower, cuckooflower, cucumber, cudweed, cuneaire, cup, currant, cut-leaf, cut-leaf-water-parsnip, cyclamen, cypress
Cabbage (Brassica oleracea)
Distribution: Known only from San Juan County in Washington; Washington and California; more commonly found in northeastern North America.
Habitat: Disturbed areas including fields, roadsides, and wastelots, where escaped from cultivation.
Origin: Introduced from Europe
Flowers: May-August
Deer cabbage (Nephrophyllidium crista-galli)
Origin: Native
Skunk cabbage (Lysichiton americanus)
Distribution: Both sides of the Cascades in Washington; Alaska south to California.
Habitat: Swampy areas from sea level to mid-elevations in the mountains.
Origin: Native
Flowers: April-July
Wild cabbage (Brassica oleracea)
Distribution: Known only from San Juan County in Washington; Washington and California; more commonly found in northeastern North America.
Habitat: Disturbed areas including fields, roadsides, and wastelots, where escaped from cultivation.
Origin: Introduced from Europe
Flowers: May-August
Yellow skunk cabbage (Lysichiton americanus)
Distribution: Both sides of the Cascades in Washington; Alaska south to California.
Habitat: Swampy areas from sea level to mid-elevations in the mountains.
Origin: Native
Flowers: April-July
Snowball cactus (Pediocactus nigrispinus)
Distribution: Endemic to central Washington, Chelan to Yakima Counties.
Habitat: Often with sagebrush, desert valleys to low mountains.
Origin: Native
Flowers: May-July
California (Rubus ursinus)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia south to California, east to Idaho.
Habitat: Open to fairly dense woodlands, sea level to mid-elevations in the mountains; common in logged areas.
Origin: Native
Flowers: April-August
California-tea (Rupertia physodes)
Distribution: West of the Cascades in Washington; Washington south to California.
Habitat: Prairie and forest edges at low elevations.
Origin: Native
Flowers: May-June
Calliopsis (Coreopsis tinctoria)
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.
Origin: Native
Flowers: June-August
Common 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.
Origin: Native
Flowers: April-June
Cusick's camas (Camassia cusickii)
Origin: Native
Glaucous death camas (Anticlea elegans)
Distribution: In the Olympic Mountains of Washington and across the northern border east of the Cascacdes crest; Alaska to Oregon, south in the Rockies to New Mexico, east across Canada and the northern United States to Virginia.
Habitat: Meadow, open forests and rocky slopes, mid- to high elevations in the mountains.
Origin: Native
Flowers: June-August
Great camas (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.
Origin: Native
Flowers: April-May
Panicled death camas (Toxicoscordion paniculatum)
Distribution: East of the Cascades crest in Washington; Washington south to California, east to Montana and Arizona.
Habitat: Common in sagebrush desert to ponderosa or lodgepole pine forests.
Origin: Native
Flowers: March-June
Camelthorn (Alhagi maurorum)
Distribution: East of the Cascades in Washington; south to California, east to Idaho and Texas.
Habitat: Disturbed areas in arid lands.
Origin: Introduced
Flowers: June-August
Biennial campion (Silene csereii)
Distribution: Occurring in scattered locations east of the Cascades crest in Washington; British Columbia south to Washington, east across the central and northern U.S. and Canada to the Atlantic Coast.
Habitat: Disturbed areas including fields, roadsides, and wastelots.
Origin: Introduced
Flowers: June-August
Bladder campion (Silene vulgaris)
Distribution: Occurring in many areas throughout Washington; widely distributed throughout North America except along the southern areas of the U.S.
Habitat: Weed of waste ground, usually at lower elevations.
Origin: Introduced from Europe
Flowers: June-August
Campion (Silene repens)
Origin: Native
Moss campion (Silene acaulis)
Distribution: Alaska to Oregon, and south in the Rocky Mountains to Arizona
Habitat: Rock crevices and talus slopes at high elevations in the mountains
Origin: Native
Flowers: June - August
Pink catchfly campion (Silene repens)
Origin: Native
Rose campion (Lychnis coronaria)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia south to California, east to Idaho and Utah; eastern North America.
Habitat: Along roadways, railways and waste land.
Origin: Introduced
Flowers: June-August
White campion (Silene latifolia)
Distribution: Widely distributed throughout Washington; introduced in much of North America.
Habitat: Well established in undisturbed areas.
Origin: Introduced from Europe
Flowers: June-August
Canadian (Elodea canadensis)
Distribution: Throughout most of the United States
Habitat: Common in slow-moving, often alkaline water, in the Pacific Northwest
Origin: Native
Flowers: July - September
Canary-broom (Genista canariensis)
Distribution: Occurring in a few scattered locations east of the Cascades crest in Washington; Washington and California.
Habitat: Disturbed areas including wastelots and roadsides
Origin: Introduced
Flowers: April-June
Sharpleaf cancerwort (Kickxia elatine)
Origin: Introduced
Bog candle (Platanthera dilatata)
Distribution: Widely distributed through the mountainous and forested areas of Washington; Alaska south to California, east to the Rocky Mountains; also in northeastern in North America.
Habitat: Wet meadows, forest openings, and streambanks from low elevations to the subalpine.
Origin: Native
Flowers: June-September
Spreading candyflower (Montia diffusa)
Distribution: West side of the Cascades, southern British Columbia to Marin County, California.
Habitat: Moist woods at low elevation.
Origin: Native
Flowers: April - July
Candystick (Allotropa virgata)
Distribution: Both sides of the Cascades in Washington; British Columbia south to California.
Habitat: Deep humus of coniferous forests at low to moderate elevations.
Origin: Native
Flowers: May-August
Wild candytuft (Noccaea fendleri)
Distribution: Occurring in the mountains throughout Washington; British Columbia south to California, east to Montana and New Mexico.
Habitat: Common in open, rocky areas at mid-elevations in the mountains.
Origin: Native
Flowers: May-August
Coastal bishop's cap (Pectiantia ovalis)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California.
Habitat: Deep, moist woods, creek bottoms and wet banks.
Origin: Native
Flowers: March-May
Caraway (Carum carvi)
Origin: Introduced; native to Europe
Flowers: June - July
Carelessweed (Cyclachaena xanthiifolia)
Distribution: Eastern Washington south to New Mexico, east to Alberta and Texas.
Habitat: Bottom land and moist waste places.
Origin: Introduced?
Flowers: August - October
Carpetweed (Mollugo verticillata)
Distribution: Chiefly east of the Cascades in Washington; British Columbia south to Baja California, east over nearly all of temperate North America.
Habitat: Moist, often waste ground, especially along river banks.
Origin: Native
Flowers: June-October
Green carpetweed (Mollugo verticillata)
Distribution: Chiefly east of the Cascades in Washington; British Columbia south to Baja California, east over nearly all of temperate North America.
Habitat: Moist, often waste ground, especially along river banks.
Origin: Native
Flowers: June-October
American wild carrot (Daucus pusillus)
Distribution: Pacific Northwest to California, and throughout the Southern States; chiefly west of the Cascades in Washington
Habitat: Dry, open areas at low elevations
Origin: Native
Flowers: May - July
Wild carrot (Daucus carota)
Distribution: Widely distributed throughout Washington; Widely distributed throughout North America.
Habitat: Roadsides, ditchbanks, somewhat moist waste land.
Origin: Introduced; native to Europe
Flowers: June-August
Cascara (Frangula purshiana)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Montana and Idaho.
Habitat: Forest understory and margins from low to moderate elevations in the mountains.
Origin: Native
Flowers: April-June
Broad-leaf cat-tail (Typha latifolia)
Distribution: Distributed widely throughout Washington; widely distributed throughout North America.
Habitat: Marshes, ponds and shallow slow-flowing water, sea level to mid-elevations in the mountains.
Origin: Native
Flowers: June-July
Narrow-leaf cat-tail (Typha angustifolia)
Distribution: Chiefly along the Atlantic Coast of the United States, west to Missouri; occasional in Washington on both sides of the Cascades.
Habitat: Shallow, quiet to slow-moving water.
Origin: Introduced from Europe and/or eastern North America
Flowers: June - July
Southern cat-tail (Typha domingensis)
Origin: Introduced
Cascade catchfly (Silene suksdorfii)
Distribution: Occurring in the Cascades Mountains in Washington; from Mt. Baker, Washington area south to northern California.
Habitat: Alpine and subalpine slopes, often on talus.
Origin: Native
Flowers: June-August
Conoid catchfly (Silene conoidea)
Origin: Introduced from Europe
Flowers: May - July
Forked catchfly (Silene dichotoma)
Origin: Introduced from Europe
Flowers: May - July
Menzies' catchfly (Silene menziesii)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to Montana and New Mexico.
Habitat: Common in open woods from the lowlands to moderate elevations in the mountains.
Origin: Native
Flowers: May-August
Night-flowering catchfly (Silene noctiflora)
Distribution: Introduced in much of the United States; more common east of the Cascades in Washington.
Habitat: Grain fields and waste areas.
Origin: Introduced from Europe
Flowers: June - August
Oregon catchfly (Silene oregana)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington south to California, east to the Rocky Mountains of Montana, Wyoming, and Utah.
Habitat: Forest openings and meadows from middle elevation to subalpine.
Origin: Native
Flowers: June-August
Palmer's catchfly (Silene bernardina)
Origin: Native
Red catchfly (Silene dioica)
Distribution: Occurring in scattered locations in lowland western Washington; British Columbia south to Oregon, east to eastern North America.
Habitat: Disturbed areas, roadsides, and wastelots where escaped from cultivation.
Origin: Introduced from Europe
Flowers: June-August
Sand catchfly (Silene conica)
Origin: Introduced from Eurasia
Flowers: May - July
Sleepy catchfly (Silene antirrhina)
Distribution: Distributed widely throughout Washington; occurring across North America from low elevations to 10,000 feet.
Habitat: Open areas, often where disturbed.
Origin: Native
Flowers: May-August
Sweet William catchfly (Atocion armeria)
Distribution: Introduced as an ornmental and occasionally escaping throughout North America.
Habitat: Disturbed soil and wasteland.
Origin: Introduced
Flowers: June - July
Catchweed (Asperugo procumbens)
Distribution: Introduced in much of the northern part of the United States; common east of the Cascades in Washington and Oregon
Habitat: A weed of moist soil in fields, roadsides and other disturbed areas, mostly east of the Cascades.
Origin: Introduced from Europe
Flowers: May - July
Catnip (Nepeta cataria)
Distribution: Chiefly east of the Cascades in Washington, but in scattered locations on the west side; widely established throughout North America.
Habitat: Roadsides, streambanks, waste places, sometimes in relatively undisturbed areas.
Origin: Introduced from Eurasia
Flowers: June-September
Elegant cats-ear (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.
Origin: Native
Flowers: May-June
Common cattail (Typha latifolia)
Distribution: Distributed widely throughout Washington; widely distributed throughout North America.
Habitat: Marshes, ponds and shallow slow-flowing water, sea level to mid-elevations in the mountains.
Origin: Native
Flowers: June-July
Redstem ceanothus (Ceanothus sanguineus)
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.
Origin: Native
Flowers: May-July
Alaskan yellow cedar (Callitropsis nootkatensis)
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.
Origin: Native
Cones: May-July
Canoe cedar (Thuja plicata)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to northern California, east to Alberta, Idaho, and Montana.
Habitat: Moist or swampy areas from sea level to mid-elevations in the mountains.
Origin: Native
Cones: Producing cones in April-May
Western red cedar (Thuja plicata)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to northern California, east to Alberta, Idaho, and Montana.
Habitat: Moist or swampy areas from sea level to mid-elevations in the mountains.
Origin: Native
Cones: Producing cones in April-May
Lesser celandine (Ficaria verna)
Distribution: In scattered locations in western Washington but likely more widespread; British Columbia south to Oregon; eastern North America.
Habitat: Disturbed areas often where shaded and moist.
Origin: Introduced from Europe
Flowers: April-May
Wild celery (Vallisneria americana)
Distribution: Native from Quebec to Texas and Florida; introduced in Dry Falls Coulee, Grant County, and several lakes west of the Cascades in Washington; also in Oregon and Idaho
Habitat: Ponds, lakes and quiet streams
Origin: Introduced from eastern North America
Flowers: July - September
Branching centaury (Centaurium pulchellum)
Origin: Introduced
Common centaury (Centaurium erythraea)
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.
Origin: Introduced
Flowers: June-August
Desert centaury (Zeltnera exaltata)
Distribution: East of the Cascades in Washington; east to Nebraska and Colorado, south to eastern California.
Habitat: Moist places, especially around alkaline lakes and hot springs.
Origin: Native
Flowers: June-July
European centaury (Centaurium erythraea)
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.
Origin: Introduced
Flowers: June-August
Lesser centaury (Centaurium pulchellum)
Origin: Introduced
Muhlenberg's centaury (Zeltnera muehlenbergii)
Distribution: Occurring in scattered locations east of the Cascades crest in Washington; British Columbia south to California, east to Idaho.
Habitat: Forest openings, wet areas at low to moderate elevations.
Origin: Native
Flowers: June-August
Muhlenberg`s centaury (Zeltnera muehlenbergii)
Distribution: Occurring in scattered locations east of the Cascades crest in Washington; British Columbia south to California, east to Idaho.
Habitat: Forest openings, wet areas at low to moderate elevations.
Origin: Native
Flowers: June-August
Tall centaury (Zeltnera exaltata)
Distribution: East of the Cascades in Washington; east to Nebraska and Colorado, south to eastern California.
Habitat: Moist places, especially around alkaline lakes and hot springs.
Origin: Native
Flowers: June-July
Starry cerastium (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.
Origin: Native
Flowers: April-August
Hoary chaenactis (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.
Origin: Native
Flowers: May-September
Chaffweed (Lysimachia minima)
Distribution: Chiefly east of the Cascades in Washington, though also found near the coast; throughout much of North America.
Habitat: Moist ground and vernal pools at low elevations.
Origin: Native
Flowers: May-June
Golden chain-tree (Laburnum anagyroidis)
Distribution: Occurring chiefly west of the Cascades crest at low elevations in Washington; British Columbia south to California, Utah.
Habitat: Disturbed sites often in proximity to residential development where escaped from cultivation.
Origin: Introduced
Flowers: May-June
Austrian chamomile (Cota austriaca)
Distribution: Known only from near Pullman in Whitman County.
Habitat: Disturbed areas, fields, roadsides.
Origin: Introduced
Flowers: July-August
Corn chamomile (Anthemis arvensis)
Distribution: Introduced in much of the United States; more common west of the Cascades in Washington
Habitat: Roadsides, disturbed areas
Origin: Introduced
False chamomile (Tripleurospermum inodorum)
Distribution: Occurring in scattered locations throughout Washington; widely distributed throughout northern 2/3 of North America.
Habitat: Noxious weed in fields and waste ground in eastern Washington
Origin: Introduced from Europe
Flowers: June-September
Field chamomile (Anthemis arvensis)
Distribution: Introduced in much of the United States; more common west of the Cascades in Washington
Habitat: Roadsides, disturbed areas
Origin: Introduced
Golden chamomile (Cota tinctoria)
Distribution: In scattered locations in Washington; widely distributed across northern half of North America.
Habitat: Disturbed areas, often where dry.
Origin: Introduced
Flowers: July-September
Mayweed chamomile (Anthemis cotula)
Distribution: Introduced throughout the United States
Habitat: Weed of roadsides and disturbed area
Origin: Introduced
Flowers: May - October
Stinking chamomile (Anthemis cotula)
Distribution: Introduced throughout the United States
Habitat: Weed of roadsides and disturbed area
Origin: Introduced
Flowers: May - October
Wild chamomile (Matricaria chamomilla)
Distribution: Widespread across the United States and southern Canada.
Habitat: Roadsides, dry waste sites.
Origin: Introduced
Flowers: Late April - June
Yellow chamomile (Cota tinctoria)
Distribution: In scattered locations in Washington; widely distributed across northern half of North America.
Habitat: Disturbed areas, often where dry.
Origin: Introduced
Flowers: July-September
Creeping Charlie (Glechoma hederacea)
Distribution: Occurring in locations throughout Washington; introduced thoughout nearly all of North America.
Habitat: Moist woods and thickets, disturbed areas.
Origin: Introduced from Eurasia
Flowers: April-June
Charlock (Sinapis arvensis)
Distribution: Occurring in scattered locations throughout Washington; widely distributed throughout North America.
Habitat: Waste places and other disturbed areas.
Origin: Introduced from the Mediterranean region, reaching North America perhaps as early as 8000 years bp (Jacobson et al. 1988)
Flowers: May-June
Jointed charlock (Raphanus raphanistrum)
Distribution: Occurring in scattered locations chiefly west of the Cascades; widely distributed throughout North America.
Habitat: Weed of waste ground.
Origin: Introduced, probably from the Mediterranean region
Flowers: May-July
Bristly-stem checker-mallow (Sidalcea hirtipes)
Distribution: Clark and Lewis counties in Washington; south to Lincoln, Tillamook and Clatsop Counties, Oregon.
Habitat: Coastal mountains to bluffs along the ocean, but not on tideflats.
Origin: Native
Flowers: June-July
Henderson's checker-mallow (Sidalcea hendersonii)
Distribution: Along the coast in Washington; Vancouver Island south to the mouth of the Umquah River in Oregon.
Habitat: On or adjacent to tidelands, coastal marshes.
Origin: Native
Flowers: June-August
Meadow checker-mallow (Sidalcea campestris)
Distribution: Native only to the Willamette Valley area (Multnomah and Washington to Benton and Linn counties). Introduced as a garden plant in western Washington, but rarely persisting.
Habitat: Dry fields and roadsides.
Origin: Introduced
Flowers: May-July
Nelson's checker-mallow (Sidalcea nelsoniana)
Distribution: Occurring in southwest Washington; south in Willamette Valley of Oregon from Portland to Salem, west to Tillamook County.
Habitat: Gravelly, well-drained soil at low elevations.
Origin: Native
Flowers: May-July
Oregon checker-mallow (Sidalcea oregana)
Distribution: Chiefly east of the Cascades in Washington; Washington south to California, east to Wyoming.
Habitat: Sagebrush plains, meadows and ponderosa pine forests.
Origin: Native
Flowers: May-July
Virgate checkerbloom (Sidalcea virgata)
Distribution: Known only from Thurston County in Washington; Thurston County, WA and then Yamhill County, Oregon south along West Cascades to California.
Habitat: Moist prairies and meadows at low elevations.
Origin: Native
Flowers: April-June
Cheeseweed (Malva parviflora)
Distribution: Scattered locations in Washington; widely distributed throughout much of North America.
Habitat: Waste places, disturbed areas.
Origin: Introduced from Eurpoe
Flowers: March-August
Bitter cherry (Prunus emarginata)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Moist woods or somewhat moist places in shrub-steppe, sea level to mid-elevations in the mountains.
Origin: Native
Flowers: April-June
Black cherry (Prunus serotina)
Origin: Introduced
European bird cherry (Prunus padus)
Distribution: Introduced in Alaska and in Pennsylvania and a few neighboring states in eastern United States
Habitat: Ornamental, occasionally escapes
Origin: Introduced
Flowers: May
Ground cherry (Physalis heterophylla)
Origin: Introduced
Laurel cherry (Prunus laurocerasus)
Distribution: Introduced ornamental, occasionally escaping west of the Cascades in Washington.
Habitat: Waste areas.
Origin: Introduced
Low hairy ground cherry (Physalis grisea)
Origin: Introduced from eastern North America
Flowers: July - September
Mahaleb cherry (Prunus mahaleb)
Distribution: Introduced species used as budding stock for cherries, sometimes escaping.
Habitat: Disturbed soil.
Origin: Introduced
Flowers: May - June
Nanking cherry (Prunus tomentosa)
Origin: Introduced
Perfumed cherry (Prunus mahaleb)
Distribution: Introduced species used as budding stock for cherries, sometimes escaping.
Habitat: Disturbed soil.
Origin: Introduced
Flowers: May - June
Puget Sound cherry (Prunus ×pugetensis)
Distribution: Southwestern B.C through Puget Trough of Washington.
Habitat: Low elevations in forests or forest edges, or disturbed areas, typically where both parent species are present.
Origin: Native
Flowers: April-May
Rum cherry (Prunus serotina)
Origin: Introduced
Sour cherry (Prunus cerasus)
Origin: Introduced
Sweet cherry (Prunus avium)
Distribution: Distributed widely throughout Washington; widely distributed throughout much of North America.
Habitat: Forest edges, fields, wastelots, and other disturbed areas.
Origin: Introduced
Flowers: April-May
Yoshino cherry (Prunus yedoensis)
Origin: Introduced
Cherry-laurel (Prunus laurocerasus)
Distribution: Introduced ornamental, occasionally escaping west of the Cascades in Washington.
Habitat: Waste areas.
Origin: Introduced
Burr chervil (Anthriscus caucalis)
Distribution: Introduced occasionally in eastern United States, and from Washington to California.
Habitat: Moist, open places, usually in disturbed soil.
Origin: Introduced; native to Eurasia
Flowers: May
Rough chervil (Chaerophyllum temulum)
Distribution: Currently known in Washington from King County area; distributed in scattered localities in northeastern North America.
Habitat: Forest edge and understory
Origin: Introduced
Flowers: April-June
Wild chervil (Anthriscus sylvestris)
Distribution: Escaped on both sides of the Cascades in Washington; British Columbia south to Oregon and Idaho; eastern North America and Greenland.
Habitat: Moist areas, usually on disturbed soil.
Origin: Introduced; native to Eurasia
Flowers: May-August
Soft chess (Bromus hordeaceus)
Distribution: Common introduction from Alaska south to Baja California, east to Idaho and Montana.
Habitat: Waste ground, roadsides, dry hillsides.
Origin: Introduced
Flowers: May - July
Chick-pea (Cicer arietinum)
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.
Origin: Introduced
Flowers: June-July
Chickenclaws (Salicornia perennis)
Distribution: Along the coast in Washington; Alaska south to Baja California, also on Atlantic coast, Europe, and Mediterranean region.
Habitat: Salt marshes and beaches along coast.
Origin: Native
Flowers: June-October
Alpine chickweed (Cerastium beeringianum)
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.
Origin: Native
Flowers: July-August
Common chickweed (Stellaria media)
Distribution: Widely distributed throughout most of Washington; widely distributed throughout North America.
Habitat: Disturbed areas, often where moist in spring; very common.
Origin: Introduced from Eurasia
Flowers: February-October
Dry chickweed (Cerastium dichotomum)
Distribution: Washington to California.
Habitat: Disturbed areas, especially along roadsides.
Origin: Introduced from southern Europe
Flowers: April-June
Dwarf chickweed (Cerastium pumilum)
Distribution: Introduced at scattered locations in Washngton.
Habitat: Dry, sandy or gravelly places, roadsides.
Origin: Introduced from Europe
Flowers: April - May
Field chickweed (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.
Origin: Native
Flowers: April-August
Giant chickweed (Myosoton aquaticum)
Distribution: Introduced in much of eastern United States; occasional in the Pacific Coast states and British Columbia.
Habitat: Stream banks, woods, marshes and wet meadows.
Origin: Introduced from Europe
Flowers: June - October
Gray chickweed (Cerastium brachypetalum)
Origin: Introduced
Greater chickweed (Stellaria neglecta)
Origin: Introduced
Lesser chickweed (Stellaria pallida)
Origin: Introduced
Little chickweed (Cerastium semidecandrum)
Origin: Introduced from Europe
Short-stalk mouse-ear chickweed (Cerastium brachypodum)
Origin: Native
Upright chickweed (Moenchia erecta)
Distribution: Occurring west of the Cascades in Washington; British Columbia south to California; in scattered locations in other parts of the central and southern U.S.
Habitat: Open, disturbed areas at low elevations.
Origin: Introduced
Flowers: April-May
Water chickweed (Montia fontana)
Distribution: Alaska to California, east to Greenland and Maine
Habitat: Wet places, sometimes aquatic and floating, low to moderate elevations
Origin: Native
Flowers: March - July
Water chickweed (Myosoton aquaticum)
Distribution: Introduced in much of eastern United States; occasional in the Pacific Coast states and British Columbia.
Habitat: Stream banks, woods, marshes and wet meadows.
Origin: Introduced from Europe
Flowers: June - October
Chicory (Cichorium intybus)
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.
Origin: Introduced from Europe
Flowers: July-October
Chinese (Brassica juncea)
Distribution: Occurring in scattered locations throughout Washington; widely distributed throughout North America.
Habitat: Disturbed areas including fields, roadsides and wastelots.
Origin: Introduced from Eurasia
Flowers: May-July
Giant chinquapin (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
Origin: Native
Flowers: April - June
Golden chinquapin (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
Origin: Native
Flowers: April - June
Chives (Allium schoenoprasum)
Distribution: Across southern Canada and northern United States; in Washington, along the Wenatchee and Columbia Rivers
Habitat: Wet meadows, rocky or gravelly streambanks and lake shores
Origin: Both native and introduced populations
Flowers: April - August
Wild chives (Allium vineale)
Distribution: Scattered localities throughout Washington.
Habitat: Disturbed areas.
Origin: Introduced from Europe
Flowers: June - August
Black chokeberry (Aronia melanocarpa)
Origin: Introduced
Common chokecherry (Prunus virginiana)
Distribution: Alaska, Canada and much of the United States
Habitat: Foothills and lowlands, more common in drier areas
Origin: Native
Flowers: May - Early July
Western chokecherry (Prunus virginiana)
Distribution: Alaska, Canada and much of the United States
Habitat: Foothills and lowlands, more common in drier areas
Origin: Native
Flowers: May - Early July
White chokecherry (Prunus virginiana)
Distribution: Alaska, Canada and much of the United States
Habitat: Foothills and lowlands, more common in drier areas
Origin: Native
Flowers: May - Early July
Chucklusa (Lomatium canbyi)
Distribution: Along Columbia River in NE Washington, common from Kittitas County south into Oregon
Habitat: Scablands and sagebrush steppe in rather deep soil
Origin: Native
Flowers: March - April
Biennial cinquefoil (Potentilla biennis)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Yukon Territories south to California, east to the Rocky Mountains; also in South Dakota.
Habitat: Disturbed areas, typically where moist to wet.
Origin: Native
Flowers: May-August
Blueleaf cinquefoil (Potentilla glaucophylla)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains.
Habitat: Moist alpine and subalpine meadows, and along stream banks in high mountain forests.
Origin: Native
Flowers: June-August
Brewer's cinquefoil (Potentilla breweri)
Distribution: Mountains of central and southeast Oregon and northern California; occasional in the Wenatchee Mountains of Washington.
Habitat: Moist meadows and stream banks to open slopes, mid- to high elevations.
Origin: Native
Flowers: June - August
Brook cinquefoil (Potentilla rivalis)
Distribution: British Columbia south, east of the Cascades in Washington, down the Columbia River Gorge and the Willamette Valley to southwest Oregon and coastal California, east to Minnesota and New Mexico.
Habitat: Damp soil, especially along rivers and around lakes, ponds, and swamps.
Origin: Native
Flowers: May - September
Bushy cinquefoil (Potentilla supina)
Distribution: In scattered locations in Washington, mostly east of the Cascades; British Columbia south to Texas, east to northeastern U.S.
Habitat: Sandy stream banks, lake shores, and moist flats.
Origin: Native
Flowers: June-July
Different-leaved cinquefoil (Potentilla glaucophylla)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains.
Habitat: Moist alpine and subalpine meadows, and along stream banks in high mountain forests.
Origin: Native
Flowers: June-August
Diverse-leaved cinquefoil (Potentilla glaucophylla)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains.
Habitat: Moist alpine and subalpine meadows, and along stream banks in high mountain forests.
Origin: Native
Flowers: June-August
Drummond's cinquefoil (Potentilla drummondii)
Distribution: Alaska to California, east to Alberta, Montana and Utah; in the Olympic and Cascade Mountains of Washington
Habitat: Forest openings, meadows and high ridges, mid- to high elevations in the mountains
Origin: Native
Flowers: July - August
English cinquefoil (Potentilla anglica)
Origin: Introduced
Fan-leaf cinquefoil (Potentilla flabellifolia)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California and Nevada, east to Alberta, Montana and Wyoming.
Habitat: Common in moist meadows, mid- to high elevations in the mountains.
Origin: Native
Flowers: June-August
Fringe-leaf cinquefoil (Potentilla flabellifolia)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California and Nevada, east to Alberta, Montana and Wyoming.
Habitat: Common in moist meadows, mid- to high elevations in the mountains.
Origin: Native
Flowers: June-August
Grey cinquefoil (Potentilla inclinata)
Origin: Introduced from central and southern Europe
Hoary cinquefoil (Potentilla argentea)
Distribution: Introduced and established in eastern United states and southern Canada; northeast Washington and a few places in Idaho.
Habitat: Sandy or gravely soil.
Origin: Introduced
Flowers: June - July
Marsh cinquefoil (Comarum palustre)
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.
Origin: Native
Flowers: June-August
Newberry's cinquefoil (Potentilla newberryi)
Origin: Native
Flowers: April - July
Northern cinquefoil (Potentilla villosa)
Distribution: Occurring in the North Cascades, Olympic Mountains, and at Mt. Rainier in Washington; Alaska to Oregon.
Habitat: Arctic tundra to alpine ridges, talus slopes and rock crevices.
Origin: Native
Flowers: July-September
Norwegian cinquefoil (Potentilla norvegica)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: Usually in moist soil, often along irrigation ditches or in waste places.
Origin: Native
Flowers: May-August
Rough cinquefoil (Potentilla norvegica)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: Usually in moist soil, often along irrigation ditches or in waste places.
Origin: Native
Flowers: May-August
Sheep cinquefoil (Potentilla ovina)
Origin: Native
Shrubby cinquefoil (Dasiphora fruticosa)
Distribution: Both sides of the Cascades in Washington; Alaska south to California, east to New Jersey.
Habitat: Lower foothills to subalpine slopes.
Origin: Native
Flowers: May-August
Silver cinquefoil (Potentilla argentea)
Distribution: Introduced and established in eastern United states and southern Canada; northeast Washington and a few places in Idaho.
Habitat: Sandy or gravely soil.
Origin: Introduced
Flowers: June - July
Snow cinquefoil (Potentilla nivea)
Distribution: Alaska to British Columbia, east to Quebec, south in the Rocky Mountains to Colorado.
Habitat: Arctic tundra and gravel bars to alpine slopes and meadows.
Origin: Native
Flowers: June - August
Subarctic cinquefoil (Potentilla hyparctica)
Origin: Native
Sulphur cinquefoil (Potentilla recta)
Distribution: Widely distributed throughout Washington; widely distributed throughout most of North America.
Habitat: Roadsides, trails, disturbed ground.
Origin: Introduced
Flowers: June-July
Vari-leaved cinquefoil (Potentilla glaucophylla)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains.
Habitat: Moist alpine and subalpine meadows, and along stream banks in high mountain forests.
Origin: Native
Flowers: June-August
Villous cinquefoil (Potentilla villosa)
Distribution: Occurring in the North Cascades, Olympic Mountains, and at Mt. Rainier in Washington; Alaska to Oregon.
Habitat: Arctic tundra to alpine ridges, talus slopes and rock crevices.
Origin: Native
Flowers: July-September
Wood cinquefoil (Potentilla anglica)
Origin: Introduced
Common clarkia (Clarkia rhomboidea)
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.
Origin: Native
Flowers: May-July
Twiggy clarkia (Clarkia viminea)
Origin: Native
Yellow clarkia (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.
Origin: Native
Flowers: May-July
Balkan clary (Salvia nemorosa)
Origin: Introduced from Eurasia
Meadow clary (Salvia pratensis)
Distribution: Scattered locations on both sides of the Cascades in Washington; escaping in parts of western, central, and eastern North America.
Habitat: Roadsides and other disturbed habitats.
Origin: Introduced
Flowers: June-August
Fell-fields Claytonia (Claytonia megarhiza)
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.
Origin: Native
Flowers: June-August
Lake Washington Claytonia (Claytonia washingtoniana)
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.
Origin: Native
Flowers: January-June
Pale claytonia (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.
Origin: Native
Flowers: March - July
Cleareye (Salvia sclarea)
Distribution: Scattered locations on both sides of the Cascades in Washington; occasionally escaping in parts of western, central, and eastern North America.
Habitat: Roadsides and other disturbed areas.
Origin: Introduced
Flowers: June-August
Common cleavers (Galium aparine)
Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Variety of habitats, sea level to mid-elevations in the mountains.
Origin: Native
Flowers: April-June
Columbia clematis (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.
Origin: Native
Flowers: May-July
Douglas's clematis (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.
Origin: Native
Flowers: May-June
Rock clematis (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.
Origin: Native
Flowers: May-July
Western clematis (Clematis ligusticifolia)
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.
Origin: Native
Flowers: June-September
Gastony's cliff-brake (Pellaea gastonyi)
Origin: Native
Smooth cliff-brake (Pellaea glabella)
Origin: Native
Cliff-fern (Woodsia scopulina)
Distribution: Alaska to California, chiefly east of the Cascade summits in Washington and Oregon
Habitat: Rock crevices, ledges and talus slopes in the mountains, and in less arid parts of the lowlands.
Origin: Native
Oregon cliff-fern (Woodsia oregana)
Distribution: Alaska to California, chiefly east of the Cascade summits in Washington and Oregon
Habitat: Rock crevices, ledges and talus slopes in the mountains, and in less arid parts of the lowlands.
Origin: Native
Brewer's cliffbrake (Pellaea breweri)
Distribution: East slope of the Cascades, Washington to California, east to Montana and Utah
Habitat: Talus slopes, cliff crevices and other rocky places, foothills to timberline
Origin: Native
Sierran cliffbrake (Pellaea brachyptera)
Origin: Native
Spiny clotbur (Xanthium spinosum)
Origin: Introduced from South America (although treated as native in CA by Jeps. Man.)
Flowers: July - October
Cloudberry (Rubus chamaemorus)
Origin: Native
Alsike clover (Trifolium hybridum)
Distribution: Introduced in Western United States
Habitat: Near cultivated fields and roadsides
Origin: Introduced
Flowers: April - September
Arrow-leaf clover (Trifolium vesiculosum)
Distribution: Occurring in a few locations in lowland western Washington; Washington south to California; also in the south-central and southeastern U.S.
Habitat: Disturbed areas in including wastelots, roadsides, and fields.
Origin: Introduced
Big-head clover (Trifolium macrocephalum)
Distribution: Occurring east of the Cascades crest in Washington; Washington, south through eastern Oregon, east to Idaho and Nevada.
Habitat: Shrub-steppe, sagebrush desert and ponderosa pine woodlands.
Origin: Native
Flowers: April-June
Bowl clover (Trifolium cyathiferum)
Distribution: Occurring chiefly east of the Cascades in Washington; British Columbia south to California.
Habitat: Uncommon in wet meadows to fairly dry, sandy soil, at moderate elevations.
Origin: Native
Flowers: May-July
Branched Indian clover (Trifolium dichotomum)
Distribution: Occurring in the San Juan Islands in Washington; Willamette Valley, OR south to California.
Habitat: Open forest, sandy embankments, and grassy balds on islands.
Origin: Native
Flowers: April-June
Burrowing clover (Trifolium subterraneum)
Distribution: Chiefly west of the Cascades in Washington; British Columbia south to California; southeastern U.S.
Habitat: Pastures, prairies, roadsides and other open, disturbed areas at low elevations.
Origin: Introduced
Flowers: April-June
Clustered clover (Trifolium glomeratum)
Origin: Introduced
Cow clover (Trifolium wormskioldii)
Distribution: Alaska to California, east to Montana and New Mexico; more common west of the Cascades in Washington
Habitat: Costal dunes to moist meadows and stream banks at low to moderate elevations in the mountains
Origin: Native
Flowers: May - September
Crimson clover (Trifolium incarnatum)
Distribution: Introduced, occasionally established in western Washington and Oregon.
Habitat: Wasteland, pastures, disturbed soil.
Origin: Introduced
Flowers: May - June
Cup clover (Trifolium cyathiferum)
Distribution: Occurring chiefly east of the Cascades in Washington; British Columbia south to California.
Habitat: Uncommon in wet meadows to fairly dry, sandy soil, at moderate elevations.
Origin: Native
Flowers: May-July
Douglas' clover (Trifolium douglasii)
Distribution: Known from Garfield, Spokane, and Whitman counties in Washington; eastern Washington south to east-central Oregon, east to eastern Idaho; disjunct in sw Oregon.
Habitat: Moist to wet areas in including open meadows, forested wetlands, and streambanks.
Origin: Native
Flowers: June-July
Dutch clover (Trifolium repens)
Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Established in a variety of native habitats, such as mountain meadows
Origin: Introduced
Flowers: April-September
Few-flowerered clover (Trifolium oliganthum)
Distribution: West of the Cascades, from southwest British Columbia to California.
Habitat: Meadowland to dry, rocky soil at low elevations.
Origin: Native
Flowers: March-July
Foothill clover (Trifolium ciliolatum)
Distribution: Southern Washington south to Baja California west of the Cascades and Sierra Nevada, at elevations of up to several thousand feet in the south.
Habitat: Wet meadows to rather dry, sandy soil.
Origin: Native
Flowers: April - June
Golden clover (Trifolium aureum)
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; Alaska south to California, east to Montana and Wyoming; also occurring in most of eastern North America.
Habitat: Roadsides, railways and waste places.
Origin: Introduced
Flowers: June-September
Greater hop clover (Trifolium aureum)
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; Alaska south to California, east to Montana and Wyoming; also occurring in most of eastern North America.
Habitat: Roadsides, railways and waste places.
Origin: Introduced
Flowers: June-September
Hop clover (Medicago lupulina)
Distribution: Widely distributed throughout Washington; widely distributed throughout much of North America.
Habitat: Waste places and sandy or gravelly soil.
Origin: Introduced
Flowers: April-August
Hop clover (Trifolium campestre)
Distribution: Distributed chiefly west of the Cascades in Washington; distributed widely throughout North America.
Habitat: Wastelands, roadsides, meadows, and other disturbed areas.
Origin: Introduced
Flowers: May-August
Knotted clover (Trifolium striatum)
Origin: Introduced
Large-head clover (Trifolium macrocephalum)
Distribution: Occurring east of the Cascades crest in Washington; Washington, south through eastern Oregon, east to Idaho and Nevada.
Habitat: Shrub-steppe, sagebrush desert and ponderosa pine woodlands.
Origin: Native
Flowers: April-June
Least hop clover (Trifolium dubium)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: Disturbed areas including forest openings, meadows, wastelots, roadsides, and lawns.
Origin: Introduced
Flowers: April-September
Long-stalked clover (Trifolium longipes)
Distribution: Common on both sides of the Cascades in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Meadows and valleys, lower mountains to subalpine slopes.
Origin: Native
Flowers: May-August
Nodding clover (Trifolium cernuum)
Origin: Introduced
Notch-leaf clover (Trifolium bifidum)
Origin: Native
Flowers: April - June
Pinole clover (Trifolium bifidum)
Origin: Native
Flowers: April - June
Plumed clover (Trifolium plumosum)
Origin: Native
Flowers: May - August
Poverty clover (Trifolium depauperatum)
Distribution: Central Oregon to southern California; sporadic and possibly always introduced in Washington and Vancouver Island, British Columbia.
Habitat: Open areas at low elevations.
Origin: Native
Flowers: April - June
Rabbit-foot clover (Trifolium arvense)
Distribution: Introduced chiefly west of the Cascades in Washington; British Columbia south to Oregon.
Habitat: Uncommon in waste places and roadsides.
Origin: Introduced
Flowers: May-July
Rancheria clover (Trifolium albopurpureum)
Distribution: Known from only a few scattered locations in Washington; Washington south to California, east to Arizona.
Habitat: Coastal bluffs to forest openings at middle elevations.
Origin: Native
Flowers: May-June
Red clover (Trifolium pratense)
Distribution: Introduced throughout the United States; common forage crop in the Pacific Northwest
Habitat: Escaped from cultivation; found along mountain trails where horses have been used
Origin: Introduced
Flowers: June - August
Reversed clover (Trifolium resupinatum)
Origin: Native
Rose clover (Trifolium hirtum)
Origin: Introduced
Salt marsh clover (Trifolium wormskioldii)
Distribution: Alaska to California, east to Montana and New Mexico; more common west of the Cascades in Washington
Habitat: Costal dunes to moist meadows and stream banks at low to moderate elevations in the mountains
Origin: Native
Flowers: May - September
Sand clover (Trifolium willdenovii)
Distribution: West side of the Cascades and east along the Columbia River in Washington; British Columbia south to California.
Habitat: Grassy hillsides, balds, prairies and meadows at low to moderate elevations.
Origin: Native
Flowers: April-July
Slender clover (Trifolium gracilentum)
Origin: Native
Flowers: April - June
Small flowered yellow sweet clover (Melilotus indicus)
Distribution: Sparingly introduced in western Washington and Oregon, more common in California.
Habitat: Waste ground, disturbed soil.
Origin: Introduced
Flowers: May - July
Small-head clover (Trifolium microcephalum)
Distribution: Distributed widely throughout Washington; British Columbia to Baja California, east to Montana and Arizona.
Habitat: Moist meadows, sandy riverbanks and drier hillsides, coastal to mid-elevations in the mountains.
Origin: Native
Flowers: April-June
Sour clover (Trifolium fucatum)
Origin: Introduced
Springbank clover (Trifolium willdenovii)
Distribution: West side of the Cascades and east along the Columbia River in Washington; British Columbia south to California.
Habitat: Grassy hillsides, balds, prairies and meadows at low to moderate elevations.
Origin: Native
Flowers: April-July
Strawberry clover (Trifolium fragiferum)
Distribution: Introduced and occasionally established in Washington, Oregon and Idaho; more common in eastern United States.
Habitat: Waste places, disturbed soil.
Origin: Introduced
Flowers: April - July
Suckling clover (Trifolium dubium)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: Disturbed areas including forest openings, meadows, wastelots, roadsides, and lawns.
Origin: Introduced
Flowers: April-September
Suffocated clover (Trifolium suffocatum)
Origin: Introduced
Teasel clover (Trifolium retusum)
Origin: Introduced
Thimble clover (Trifolium microdon)
Distribution: Chiefly west of the Cascades in Washington; British Columbia south to California.
Habitat: In meadows or on rocky or sandy soil at low elevations.
Origin: Native
Flowers: April-June
Thompson's clover (Trifolium thompsonii)
Distribution: Swakane Canyon, Chelan County, Washington, north to Entiat Valley, and in Douglas County opposite Swakane Canyon.
Habitat: Common on dry, grassy hillsides just below the ponderosa pine woodlands
Origin: Native
Flowers: May - June
Tomcat clover (Trifolium willdenovii)
Distribution: West side of the Cascades and east along the Columbia River in Washington; British Columbia south to California.
Habitat: Grassy hillsides, balds, prairies and meadows at low to moderate elevations.
Origin: Native
Flowers: April-July
Tree clover (Trifolium ciliolatum)
Distribution: Southern Washington south to Baja California west of the Cascades and Sierra Nevada, at elevations of up to several thousand feet in the south.
Habitat: Wet meadows to rather dry, sandy soil.
Origin: Native
Flowers: April - June
Twin clover (Trifolium latifolium)
Distribution: Wallowa County, Oregon to Missoula, Montana.
Habitat: Moist meadows to rocky ridges.
Origin: Native
Flowers: June - August
Valparaiso clover (Trifolium microdon)
Distribution: Chiefly west of the Cascades in Washington; British Columbia south to California.
Habitat: In meadows or on rocky or sandy soil at low elevations.
Origin: Native
Flowers: April-June
White clover (Trifolium repens)
Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Established in a variety of native habitats, such as mountain meadows
Origin: Introduced
Flowers: April-September
White-tip clover (Trifolium variegatum)
Distribution: Widely distributed throughout much of Washington; Alaska south to California, east towards the Rocky Mountains.
Habitat: Dry, sandy soil to moist meadows.
Origin: Native
Flowers: April-July
Woolly-head clover (Trifolium eriocephalum)
Distribution: Cascades from southern Washington to Northern California, east to Nevada, Utah and Montana
Habitat: Moderate to mid-elevations in the mountains
Origin: Native
Flowers: May - July
Yellow clover (Trifolium aureum)
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; Alaska south to California, east to Montana and Wyoming; also occurring in most of eastern North America.
Habitat: Roadsides, railways and waste places.
Origin: Introduced
Flowers: June-September
Hairy clover-fern (Marsilea vestita)
Distribution: Both sides of the Cascades in Washington; British Columbia south to California, east to Minnesota and Louisiana.
Habitat: Ponds, vernal pools, floodplains.
Origin: Native
Spores: Spores produced April-October
Devil's club (Oplopanax horridus)
Distribution: Widely distributed throughout the forested areas of Washington; Alaska south to Oregon, east to Ontario.
Habitat: Moist woods at mid-elevations, especially along streams.
Origin: Native
Flowers: May-July
Alaskan clubmoss (Diphasiastrum sitchense)
Distribution: Alaska to Oregon, east to Idaho and Montana, and across central Canada to northeastern U.S. and eastern Canada; also in eastern Asia from Japan north.
Habitat: Subalpine-alpine meadows and open rocky areas at mid-to high elevations in the mountains; occasionally in conifer forest or under brush.
Origin: Native
Bog clubmoss (Lycopodiella inundata)
Distribution: Occurring west of the Cascades crest in Washington; Alaska south to California; in scattered locations in north central Canada; from Minnesota and Ontarioa east to the Atlantic Coast.
Habitat: Wet areas, pond and lakeshores from low to middle elevations in the mountains.
Origin: Native
Common clubmoss (Lycopodium clavatum)
Distribution: Both sides of the Cascades in Washington; British Columbia south to California in western North America; circumboreal.
Habitat: Moist coniferous woods and swamps.
Origin: Native
Spores: Produces spores April-October
Douglas' spikemoss clubmoss (Selaginella douglasii)
Distribution: Abundant in the Columbia River Gorge, especially on the Oregon side, west along the river to Portland, OR, and Cowlitz County, WA; also along the Clearwater River in Idaho.
Habitat: Cliffs, banks and tree trunks in humid regions at low elevations
Origin: Native
Fir clubmoss (Huperzia miyoshiana)
Origin: Native
Hybrid clubmoss (Diphasiastrum alpinum × Diphasiastrum sitchense)
Distribution: Known from British Columbia south to Oregon and east to Montana, also in Greenland and Newfoundland.
Habitat: Upper montane coniferous forest and brushy areas, and subalpine and alpine meadows. In Washington, has been found in subalpine-alpine heath meadows and on shaded mossy mineral soil below conifers on high montane roadcuts.
Origin: Native
Interrupted clubmoss (Spinulum annotinum)
Distribution: Alaska to Oregon, east to Montana and south in the Rockies to New Mexico; across Canada and in eastern United States from Maine to Virginia
Habitat: Moist forests, bog edges and rocky areas, lowlands to subalpine
Origin: Native
Lesser clubmoss (Selaginella douglasii)
Distribution: Abundant in the Columbia River Gorge, especially on the Oregon side, west along the river to Portland, OR, and Cowlitz County, WA; also along the Clearwater River in Idaho.
Habitat: Cliffs, banks and tree trunks in humid regions at low elevations
Origin: Native
Marsh clubmoss (Lycopodiella inundata)
Distribution: Occurring west of the Cascades crest in Washington; Alaska south to California; in scattered locations in north central Canada; from Minnesota and Ontarioa east to the Atlantic Coast.
Habitat: Wet areas, pond and lakeshores from low to middle elevations in the mountains.
Origin: Native
Northern bog clubmoss (Lycopodiella inundata)
Distribution: Occurring west of the Cascades crest in Washington; Alaska south to California; in scattered locations in north central Canada; from Minnesota and Ontarioa east to the Atlantic Coast.
Habitat: Wet areas, pond and lakeshores from low to middle elevations in the mountains.
Origin: Native
Prickly tree clubmoss (Dendrolycopodium dendroideum)
Distribution: Widespread across boreal forests of North America, south to northern Washington, Idaho, Montana, Colorado, and NE U.S. Also found in Asia. In Washington, known from scattered locations in the west Cascades and in Pend Oreille county.
Habitat: Woodlands and open brushy areas. In Washington, found mostly among rock or talus with thick moss or duff layers, often under brush or on edges of forest. At mid elevations in the mountains.
Origin: Native
Ptarmigan clubmoss (Lycopodium lagopus)
Origin: Native
Sitka clubmoss (Diphasiastrum sitchense)
Distribution: Alaska to Oregon, east to Idaho and Montana, and across central Canada to northeastern U.S. and eastern Canada; also in eastern Asia from Japan north.
Habitat: Subalpine-alpine meadows and open rocky areas at mid-to high elevations in the mountains; occasionally in conifer forest or under brush.
Origin: Native
Stiff clubmoss (Spinulum annotinum)
Distribution: Alaska to Oregon, east to Montana and south in the Rockies to New Mexico; across Canada and in eastern United States from Maine to Virginia
Habitat: Moist forests, bog edges and rocky areas, lowlands to subalpine
Origin: Native
Western clubmoss (Huperzia occidentalis)
Distribution: Coastal ranges from SE Alaska and SW Yukon south to Oregon; also in SE British Columbia, northern Idaho, and northwest Montana. Not found outside North America. In Washington, found from the west side of the Cascades west to the coast.
Habitat: In shaded conifer forest, usually where moist such as along streams and in depressions; rooted on decaying logs, duff, or soil. Low to mid elevations.
Origin: Native
Chairmaker's clubrush (Schoenoplectus pungens)
Distribution: Occurring on both sides of the Cascades crest in Washington; widespread throughout North America.
Habitat: Marshes and wet, low ground; tolerent of alkali.
Origin: Native
Flowers: May-August
Low clubrush (Isolepis cernua)
Distribution: Coastal from Southern British Columbia south to northern Mexico.
Habitat: Usually in brackish to saline water of marshes, beaches, and shores.
Origin: Native
Flowers: June - August
Low lateral clubrush (Isolepis cernua)
Distribution: Coastal from Southern British Columbia south to northern Mexico.
Habitat: Usually in brackish to saline water of marshes, beaches, and shores.
Origin: Native
Flowers: June - August
Swaying clubrush (Schoenoplectus subterminalis)
Distribution: Chiefly west of the Cascades, southern Alaska to southern Oregon; also in northern Idaho, northwest Montana, and eastern United States.
Habitat: Quiet, shallow water 2-8 dm. deep,
Origin: Native
Flowers: July - August
Tufted clubrush (Trichophorum cespitosum)
Distribution: Circumboreal, extending south in North America chiefly west of the Cascades to central Oregon; also in North Carolina, Utah and Idaho.
Habitat: Sphagnum bogs, marshes, and other very wet places.
Origin: Native
Flowers: July - August
Water clubrush (Schoenoplectus subterminalis)
Distribution: Chiefly west of the Cascades, southern Alaska to southern Oregon; also in northern Idaho, northwest Montana, and eastern United States.
Habitat: Quiet, shallow water 2-8 dm. deep,
Origin: Native
Flowers: July - August
Coast (Polypodium scouleri)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south along the coast to California.
Habitat: Cliffs and rocky outcroppings along the coast.
Origin: Native
Cobraplant (Darlingtonia californica)
Distribution: Introduced at Summer Lake in Washington; Lane County, Oregon to northwest California.
Habitat: Bogs along coast, along streams, often on serpentine
Origin: Introduced
Flowers: June - August
Cock's-head (Astragalus agrestis)
Distribution: Occurring east of the Cascades crest in Washington; widely distributed in the western, central, and northeastern regions of North America.
Habitat: Moist spots in sagebrush plains, and mountain meadows to alpine slopes.
Origin: Native
Flowers: June-August
Canada cocklebur (Xanthium strumarium)
Distribution: Occurring chiefly east of the Cascades crest in Washington; widely distributed throughout most of North America.
Habitat: Fields, waste places, flood lanes and lake beaches.
Origin: Native
Flowers: April-October
Common cocklebur (Xanthium strumarium)
Distribution: Occurring chiefly east of the Cascades crest in Washington; widely distributed throughout most of North America.
Habitat: Fields, waste places, flood lanes and lake beaches.
Origin: Native
Flowers: April-October
Spiny cockleburr (Xanthium spinosum)
Origin: Introduced from South America (although treated as native in CA by Jeps. Man.)
Flowers: July - October
Codlins-and-cream (Epilobium hirsutum)
Distribution: Introduced occasionally west of the Cascades and near Bingen in Washington; British Columbia south to Oregon; upper central and northeastern North America.
Habitat: Garden escape in wet areas.
Origin: Introduced
Flowers: June-August
Coldenia (Tiquilia nuttallii)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Utah.
Habitat: Sagebrush plains.
Origin: Native
Flowers: May-August
Few-flowered collinsia (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.
Origin: Native
Flowers: March-April
Rattan collinsia (Collinsia rattanii)
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.
Origin: Native
Flowers: April - June
Alpine collomia (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.
Origin: Native
Flowers: June-August
Bristle-flowered collomia (Collomia macrocalyx)
Origin: Native
Flowers: May - June
Diffuse collomia (Collomia tenella)
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.
Origin: Native
Flowers: June-July
Large-flowered collomia (Collomia grandiflora)
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.
Origin: Native
Flowers: May-August
Larsen's alpine collomia (Collomia larsenii)
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.
Origin: Native
Flowers: June-August
Narrow-leaf collomia (Collomia linearis)
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.
Origin: Native
Flowers: May-August
Talus collomia (Collomia larsenii)
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.
Origin: Native
Flowers: June-August
Varied-leaf collomia (Collomia heterophylla)
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.
Origin: Native
Flowers: June-August
Yellow-staining collomia (Collomia tinctoria)
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.
Origin: Native
Flowers: June-August
Coltsfoot (Tussilago farfara)
Distribution: In scattered locations in western Washington; widespread in eastern North America.
Habitat: Waste ground, disturbed forest understory, and near areas of garden cultivation.
Origin: Introduced from Eurasia
Flowers: March-May
Japanese coltsfoot (Petasites japonicus)
Distribution: Sparingly introduced in Washington
Habitat: Escaped from cultivation
Origin: Introduced
European Columbine (Aquilegia vulgaris)
Distribution: Introduced as a garden flower, occasionally escaping.
Habitat: Disturbed soil near gardens.
Origin: Introduced
Flowers: May - July
Red Columbine (Aquilegia formosa)
Distribution: Widely distributed throughout Washington; Alaska south to California, coastal and inland to Alberta and Wyoming.
Habitat: Open woods, lowlands to mid-elevations in the mountains.
Origin: Native
Flowers: May-August
Sitka Columbine (Aquilegia formosa)
Distribution: Widely distributed throughout Washington; Alaska south to California, coastal and inland to Alberta and Wyoming.
Habitat: Open woods, lowlands to mid-elevations in the mountains.
Origin: Native
Flowers: May-August
Yellow Columbine (Aquilegia flavescens)
Distribution: East of the Cascades, British Columbia to Kittitas County, Washington, east to Alberta, then south to Colorado; also, the Wallowa Mountains of Oregon
Habitat: Moist mountain meadows and talus to alpine slopes
Origin: Native
Flowers: June - early August
Combleaf (Polyctenium fremontii)
Distribution: Known only from Grant County in Washington; Washington south to California, east to Idaho and Nevada.
Habitat: Open areas in sagebrush-steppe.
Origin: Native
Flowers: April-May
Bristly combseed (Pectocarya setosa)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Idaho, Utah, and New Mexico.
Habitat: Open areas in sagebrush-steppe habitat.
Origin: Native
Flowers: May-June
Shortleaf combseed (Pectocarya penicillata)
Distribution: East of the Cascades, southern British Columbia to Baja California, east to Idaho and Utah.
Habitat: Dry, open areas, often in sandy soil and among sagebrush, at low elevations.
Origin: Native
Flowers: April - June
Western chocolate come (Rudbeckia occidentalis)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington south to California, east to the Rocky Mountains.
Habitat: Moist openings in forests at moderate to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Common comfrey (Symphytum officinale)
Distribution: Distributed west of the Cascades in Washington; widely distributed throughout North America except in extreme north and south states/provinces.
Habitat: Escaped from cultivation, often found in disturbed areas.
Origin: Introduced from Europe
Flowers: May-August
Creeping comfrey (Symphytum grandiflorum)
Origin: Introduced from Caucasus
Hybrid comfrey (Symphytum ×uplandicum)
Origin: Introduced from Europe
Prickly comfrey (Symphytum asperum)
Distribution: Introduced and occasionally escaped from cultivation, scattered in the United States; chiefly west of the Cascades in Washington.
Habitat: Roadsides and other disturbed habitats.
Origin: Introduced from sw Asia
Flowers: May - July
Rough comfrey (Symphytum asperum)
Distribution: Introduced and occasionally escaped from cultivation, scattered in the United States; chiefly west of the Cascades in Washington.
Habitat: Roadsides and other disturbed habitats.
Origin: Introduced from sw Asia
Flowers: May - July
White comfrey (Symphytum orientale)
Origin: Introduced from sw Asia
California compassplant (Wyethia angustifolia)
Distribution: Occurring in southwestern Washington and in the Columbia River Gorge in Washington; Washington south to California.
Habitat: Meadows and moist, open hillsides at low elevations.
Origin: Native
Flowers: May-July
Green-headed coneflower (Rudbeckia laciniata)
Distribution: Montana and southern Idaho, east to Quebec, then south to Florida.
Habitat: Streambanks and other moist places.
Origin: Introduced from farther east in United States
Flowers: July - September
Or showy coneflower (Rudbeckia alpicola)
Origin: Native
Flowers: June - August
Prairie coneflower (Ratibida columnifera)
Distribution: Southeast British Columbia and Montana, east to Minnesota and south to Texas.
Habitat: Prairies, plains and waste ground.
Origin: Introduced
Flowers: June-August
Tall coneflower (Rudbeckia laciniata)
Distribution: Montana and southern Idaho, east to Quebec, then south to Florida.
Habitat: Streambanks and other moist places.
Origin: Introduced from farther east in United States
Flowers: July - September
Western coneflower (Rudbeckia occidentalis)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington south to California, east to the Rocky Mountains.
Habitat: Moist openings in forests at moderate to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Coneplant (Hemitomes congestum)
Distribution: West of the Cascades in Washington; Vancouver Island and mainland British Columbia south to Monterey County, California.
Habitat: Rich humus in damp coniferous forests at mid-elevations in the mountains.
Origin: Native
Flowers: June-August
South American conyza (Conyza bonariensis)
Distribution: Introduced from Oregon through Arizona and Texas to Florida
Habitat: Occasionally escapes from cultivation
Origin: Introduced
Northern false coolwort (Bolandra oregana)
Distribution: Along the Columbia River Gorge and in southeastern Washington; Washington south to Oregon along the lower Columbia River Gorge, and along the Snake River and its tributaries in Oregon and Idaho.
Habitat: Moist, mossy rocks, usually near waterfalls.
Origin: Native
Flowers: May-June
Oregon coolwort (Sullivantia oregana)
Distribution: Columbia River Gorge and lower Willamatte Valley, Oregon.
Habitat: On moist cliffs, especially near waterfalls.
Origin: Native
Flowers: Late May - August
Coon's-tail (Ceratophyllum demersum)
Distribution: Throughout much of temperate North America
Habitat: Standing to slow-moving water, from the lowlands to mid-elevations in the mountains
Origin: Native
Flowers: June - September
Copperbush (Elliottia pyroliflora)
Distribution: Occurring west of the Cascades in Washington; Alaska south to Oregon.
Habitat: Moist forests and stream banks at mid- to high elevations in the mountains.
Origin: Native
Flowers: June-July
Spotted coral-root (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.
Origin: Native
Flowers: May-August
Striped coral-root (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.
Origin: Native
Flowers: April-August
Red coraldrops (Synthyris rubra)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to Oregon, east to Idaho and Montana.
Habitat: Open slopes and dry meadows in the foothills and lowlands.
Origin: Native
Flowers: April-May
Early coralroot (Corallorhiza trifida)
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.
Origin: Native
Flowers: June-August
Northern coralroot (Corallorhiza trifida)
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.
Origin: Native
Flowers: June-August
Pacific coralroot (Corallorhiza mertensiana)
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.
Origin: Native
Flowers: May-August
Western coralroot (Corallorhiza mertensiana)
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.
Origin: Native
Flowers: May-August
Alkali cordgrass (Spartina gracilis)
Origin: Native
Flowers: June - July
Chilean cordgrass (Spartina densiflora)
Origin: Introduced from Chile
English cordgrass (Spartina anglica)
Origin: Introduced from Europe
Freshwater cordgrass (Spartina pectinata)
Distribution: Eastern Washington and Oregon, east to Newfoundland and North Carolina.
Habitat: Ditches, ponds, and fresh-water marshes.
Origin: Native
Flowers: June - July
Prairie cordgrass (Spartina pectinata)
Distribution: Eastern Washington and Oregon, east to Newfoundland and North Carolina.
Habitat: Ditches, ponds, and fresh-water marshes.
Origin: Native
Flowers: June - July
Saltmeadow cordgrass (Spartina patens)
Origin: Introduced from the Atlantic Coast of North America
Saltwater cordgrass (Spartina alterniflora)
Distribution: Introduced in Pacific County, Washington; common along the Atlantic and Gulf Coasts of the United States.
Habitat: Along the coast in brackish water.
Origin: Introduced from the Atlantic coast of North America
Flowers: August - September
Smooth cordgrass (Spartina alterniflora)
Distribution: Introduced in Pacific County, Washington; common along the Atlantic and Gulf Coasts of the United States.
Habitat: Along the coast in brackish water.
Origin: Introduced from the Atlantic coast of North America
Flowers: August - September
Townsend's cordgrass (Spartina ×townsendii)
Origin: Introduced from Europe
Columbia coreopsis (Coreopsis tinctoria)
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.
Origin: Native
Flowers: June-August
Corn (Zea mays)
Origin: Introduced
Sand corn (Toxicoscordion paniculatum)
Distribution: East of the Cascades crest in Washington; Washington south to California, east to Montana and Arizona.
Habitat: Common in sagebrush desert to ponderosa or lodgepole pine forests.
Origin: Native
Flowers: March-June
Cornbind (Fallopia convolvulus)
Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Cultivated or waste ground.
Origin: Introduced
Flowers: May-October
Common corncockle (Agrostemma githago)
Distribution: Introduced and well established in Washington; also occurring in Oregon, less common in Idaho and Montana.
Habitat: Roadsides and wasteland.
Origin: Introduced, European
Flowers: June-July
Dwarf cornel (Cornus canadensis)
Origin: Native
Garden cornflower (Centaurea cyanus)
Distribution: Widespread introductions in the Pacific Northwest
Habitat: Readily established when escaped from cultivation
Origin: Introduced from the Mediterranean region
Flowers: May - October
Mountain cornflower (Centaurea montana)
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.
Origin: Introduced from Europe
Flowers: May-August
Keel-fruit cornsalad (Valerianella carinata)
Origin: Introduced from Europe
Flowers: April - May
Golden corydalis (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.
Origin: Native
Flowers: May-August
Marsh corydalis (Corydalis aquae-gelidae)
Distribution: In the Cascades in Clackamas and Multnomah Counties, Oregon
Habitat: Wet places of shaded forests.
Origin: Native
Flowers: June - August
Yellow corydalis (Corydalis lutea)
Origin: Introduced
CostMary (Tanacetum balsamita)
Distribution: Introduced and escaped over much of the United States; not common in the Pacific Northwest.
Habitat: Roadsides and other waste places.
Origin: Introduced
Flowers: August - September
Bearberry cotoneaster (Cotoneaster dammeri)
Origin: Introduced from China
Bullate cotoneaster (Cotoneaster rehderi)
Origin: Introduced from China
Diel's cotoneaster (Cotoneaster dielsianus)
Origin: Introduced from China
Few-flowered cotoneaster (Cotoneaster nitens)
Origin: Introduced from China
Franchet's cotoneaster (Cotoneaster franchetii)
Distribution: Distributed west of the Cascades in Washington; Washington south to California
Habitat: Lowland forest edges, grassy balds, disturbed areas.
Origin: Introduced from China
Flowers: May-June
Gamble's cotoneaster (Cotoneaster gamblei)
Origin: Introduced
Himalayan cotoneaster (Cotoneaster simonsii)
Origin: Introduced from the Himalayas
Late cotoneaster (Cotoneaster lacteus)
Distribution: Occurring in lowland western Washington; British Columbia to California.
Habitat: Disturbed areas, thickets, and forest margins.
Origin: Introduced from China
Flowers: May-July
Maire's cotoneaster (Cotoneaster mairei)
Origin: Introduced
Milk-flower cotoneaster (Cotoneaster lacteus)
Distribution: Occurring in lowland western Washington; British Columbia to California.
Habitat: Disturbed areas, thickets, and forest margins.
Origin: Introduced from China
Flowers: May-July
Orange cotoneaster (Cotoneaster franchetii)
Distribution: Distributed west of the Cascades in Washington; Washington south to California
Habitat: Lowland forest edges, grassy balds, disturbed areas.
Origin: Introduced from China
Flowers: May-June
Puckered-leaf cotoneaster (Cotoneaster rehderi)
Origin: Introduced from China
Purple-flowering cotoneaster (Cotoneaster atropurpureus)
Origin: Introduced
Rock cotoneaster (Cotoneaster horizontalis)
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.
Origin: Introduced from China
Flowers: May-June
Rockspray cotoneaster (Cotoneaster horizontalis)
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.
Origin: Introduced from China
Flowers: May-June
Shiny cotoneaster (Cotoneaster lucidus)
Origin: Introduced from Siberia and Mongolia
Simon's cotoneaster (Cotoneaster simonsii)
Origin: Introduced from the Himalayas
Spreading cotoneaster (Cotoneaster divaricatus)
Origin: Introduced from China
Stern's cotoneaster (Cotoneaster sternianus)
Origin: Introduced
Taiping cotoneaster (Cotoneaster villosulus)
Origin: Introduced
Tengyueh cotoneaster (Cotoneaster tengyuehensis)
Origin: Introduced from China
Truncate-leaved cotoneaster (Cotoneaster mairei)
Origin: Introduced
Wall cotoneaster (Cotoneaster horizontalis)
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.
Origin: Introduced from China
Flowers: May-June
Willow-leaved cotoneaster (Cotoneaster salicifolius)
Origin: Introduced from China
Cotton (Gossypium hirsutum)
Origin: Introduced
Chamisso's cotton-grass (Eriophorum chamissonis)
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska south to Oregon, east across the northern half of North America to the Atlantic Coast.
Habitat: Swamps and other wet places at moderate elevations in the mountains, descending to sea level along the coast.
Origin: Native
Flowers: May-August
Many-spiked cotton-grass (Eriophorum angustifolium)
Distribution: Circumboreal at high latitudes, extending south into Oregon, Colorado and New York.
Habitat: Cold swamps and bogs at moderate to high elevations in the mountains.
Origin: Native
Flowers: July - August
Russet cottongrass (Eriophorum chamissonis)
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska south to Oregon, east across the northern half of North America to the Atlantic Coast.
Habitat: Swamps and other wet places at moderate elevations in the mountains, descending to sea level along the coast.
Origin: Native
Flowers: May-August
Slender cottongrass (Eriophorum gracile)
Distribution: Alaska, Canada and the northern half on the United States
Habitat: Wet places, mid- to high elevation in the mountains
Origin: Native
Flowers: May - August
Tassel cottongrass (Eriophorum viridicarinatum)
Origin: Native
Flowers: June - July
Tawny cottongrass (Eriophorum virginicum)
Origin: Introduced
Field cottonrose (Filago arvensis)
Distribution: Occurring east of the Cascades crest in Washington; Alaska to Oregon, east to Sasketchewan, Nebraska, Minnesota and Michigan.
Habitat: Dry, open waste land and overgrazed ranges.
Origin: Introduced
Flowers: July-September
Little cottonrose (Logfia minima)
Distribution: Native to northern Europe
Habitat: Heaths, sandy areas
Origin: Introduced from Europe
Flowers: June-Sept.
Daggerleaf cottonweed (Logfia gallica)
Origin: Introduced
Black cottonwood (Populus nigra)
Origin: Introduced
Black cottonwood (Populus trichocarpa)
Distribution: Occurring throughout Washington; Alaska to California, east to Alberta and Wyoming.
Habitat: Streambanks and moist woods, sea level to mid-elevations in the mountains.
Origin: Native
Flowers: April-June
Eastern cottonwood (Populus deltoides)
Origin: Introduced
Narrow-leaved cottonwood (Populus angustifolia)
Origin: Native
Cous (Lomatium cous)
Distribution: Southeast Washington and northeast Oregon,east through Idaho to Montana and Wyoming
Habitat: Dry, open, often rocky places often with sagebrush; common at low elevations, occasionally found much higher
Origin: Native
Flowers: April - July
American cow-parsnip (Heracleum maximum)
Distribution: Widely distributed throughout Washington; occurring throughout North America except for southeastern and lower Midwest of U.S.
Habitat: Moist areas, low to mid-elevations.
Origin: Native
Flowers: June-August
Cow-poison (Delphinium trolliifolium)
Distribution: Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; Washington south to California.
Habitat: Moist, shady woods at low to moderate elevations.
Origin: Native
Flowers: April-May
Cowcockle (Vaccaria hispanica)
Distribution: Occurring in scattered locations across Washington; widely distributed throughout most of North America.
Habitat: Roadsides, railways and old fields.
Origin: Introduced from Europe
Flowers: May-August
Flowering tea crabapple (Malus hupehensis)
Origin: Introduced
Japanese crabapple (Malus toringo)
Origin: Introduced
Oregon crabapple (Malus fusca)
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska south to California.
Habitat: Moist woods, swamps and open canyons from sea level to moderate elevations in the mountains.
Origin: Native
Flowers: April-May
Pearleaf crabapple (Malus prunifolia)
Origin: Introduced
Plumleaf crabapple (Malus prunifolia)
Origin: Introduced
Siberian crabapple (Malus baccata)
Origin: Introduced
Siebold crabapple (Malus toringo)
Origin: Introduced
Tea crabapple (Malus hupehensis)
Origin: Introduced
Western crabapple (Malus fusca)
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska south to California.
Habitat: Moist woods, swamps and open canyons from sea level to moderate elevations in the mountains.
Origin: Native
Flowers: April-May
Hairy crabgrass (Digitaria sanguinalis)
Distribution: A weed in most of the United States.
Habitat: Lawns, gardens, and wasteland.
Origin: Introduced from Eurasia
Flowers: July - October
Smooth crabgrass (Digitaria ischaemum)
Distribution: Most of southern Canada, and all of the United States except the extreme southeast and southwest.
Habitat: Lawns, roadsides and wastland, usually where moist.
Origin: Introduced from Eurasia
Flowers: July - September
Cultivated cranberry (Vaccinium macrocarpon)
Distribution: In scattered locations in lowlands west of the Cascades crest; introduced British Columbia south to California; native eastern North
Origin: Introduced from northeastern United States
Flowers: May - June
High-bush cranberry (Viburnum edule)
Distribution: Widely distributed on both sides of the Cascades in Washington; Alaska south to Newfoundland, south to northern Oregon, Colorado and Pennsylvania.
Habitat: Moist woods and swamps.
Origin: Native
Flowers: May-July
Large cranberry (Vaccinium macrocarpon)
Distribution: In scattered locations in lowlands west of the Cascades crest; introduced British Columbia south to California; native eastern North
Origin: Introduced from northeastern United States
Flowers: May - June
Small cranberry (Vaccinium oxycoccos)
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska south to California, east to Idaho, across Canada; from the upper Midwest to the Atlantic coast.
Habitat: Usually in sphagnum bogs.
Origin: Native
Flowers: May-July
Cut-leaf crane's-bill (Geranium dissectum)
Distribution: Chiefly west of the Cascades in Washington; British Columbia south to California and Nevada; widely distributed in central and eastern North America.
Habitat: Disturbed ground and waste places.
Origin: Introduced from Europe
Flowers: March-July
Long-stalk crane's-bill (Geranium columbinum)
Distribution: Chiefly west of the Cascades and along the Columbia River in Washington; occasional introduction in central and eastern United States.
Habitat: Waste places and disturbed ground.
Origin: Introduced from Europe
Flowers: June-August
Montane crane's-bill (Geranium ibericum)
Origin: Introduced
Northern crane's-bill (Geranium bicknellii)
Distribution: Occurring on both sides of the Cascades in Washington; widely distributed throughout much of North America except along the southern U.S. boundary and lower Great Plains.
Habitat: Woodlands or open fields.
Origin: Native
Flowers: May-August
Small-flower crane's-bill (Geranium pusillum)
Distribution: Occurring on both sides of the Cascades; widely distributed throughout North America except along southern border of U.S.
Habitat: Moist, waste places.
Origin: Introduced
Flowers: May-August
Spanish crane's-bill (Geranium ibericum)
Origin: Introduced
Sticky purple crane's-bill (Geranium viscosissimum)
Distribution: East of the Cascades in Washington, British Columbia south to California, east to Colorado.
Habitat: Moderately dry areas, low to mid-elevations.
Origin: Native
Flowers: May-August
White crane's-bill (Geranium richardsonii)
Distribution: East of the Cascades in Washington; British Columbia south to southern California and New Mexico.
Habitat: Mostly in partial shade, from the lowlands to well up in the mountains.
Origin: Native
Flowers: June-August
Shining cranes-bill (Geranium lucidum)
Distribution: Western Washington; Washington south to California.
Habitat: Disturbed areas such as roadsides and ditches, usually where moist, at low elevations.
Origin: Introduced
Flowers: Apr-June
Hedgerow cranesbill (Geranium pyrenaicum)
Origin: Introduced
Pendent-pod crazyweed (Oxytropis deflexa)
Distribution: Occurring in north-central Washington; widely distributed throughout western North America and across Canada.
Habitat: Forest openings and meadows at moderate elevations in the mountains.
Origin: Native
Flowers: June-July
Sticky crazyweed (Oxytropis borealis)
Distribution: Alaska to Quebec, south chiefly in the Rocky Mountains to Colorado, west to the Sierra Nevada of California, the Wallowas of Oregon and the Olympics of Washington.
Habitat: Alpine and subalpine habitats.
Origin: Native
Flowers: June - August
Bearded creeper (Crupina vulgaris)
Distribution: Introduced in Idaho and Chelan County, Washington
Habitat: Weed or fields and roadsides
Origin: Introduced
Creeping-glow-wort (Sibbaldia procumbens)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout western North America and northeastern North America; circumboreal.
Habitat: Open, dry to moist subalpine and alpine slopes.
Origin: Native
Flowers: June-August
Creeping-Jenny (Lysimachia nummularia)
Distribution: Scattered locations west of the Cascades in Washington; British Columbia south to California and Nevada; occurring in central U.S and eastern North America.
Habitat: Moist, disturbed ground along lakes, ponds, roadsides and near gardens.
Origin: Introduced
Flowers: June-August
Creeping-snowberry (Gaultheria hispidula)
Distribution: Occurring in northeast Washsington; British Columbia east to Labrador, south into northern Idaho.
Habitat: Sphagnum bogs and deep coniferous woods.
Origin: Native
Flowers: May-June
Belle Isle cress (Barbarea verna)
Origin: Introduced from Eurasia
Flowers: April - July
Columbia yellowcress cress (Rorippa columbiae)
Distribution: In the south-central counties of Washington; Washington south to California.
Habitat: Moist, sandy soil.
Origin: Native
Flowers: May-August
Cress (Rorippa columbiae)
Distribution: In the south-central counties of Washington; Washington south to California.
Habitat: Moist, sandy soil.
Origin: Native
Flowers: May-August
Field cress (Lepidium campestre)
Distribution: Distributed across Washington in scattered locations; distributed throughout much of North America.
Habitat: Dry, disturbed areas.
Origin: Introduced from Eurasia
Flowers: May-July
Lava cress (Sisymbrium linifolium)
Distribution: East of the Cascades crest in Washington; British Columbia south to Arizona (not including California), east to the Rocky Mountains.
Habitat: Sagebrush-steppe communities, rock crevices.
Origin: Native
Flowers: April-June
Lyreleaved cress (Arabidopsis kamchatica)
Origin: Native
Mouse-ear cress (Arabidopsis thaliana)
Distribution: Widely distributed througout Washington; widely distributed throughout North America.
Habitat: Disturbed areas, particularly near cities and towns.
Origin: Introduced from Eurasia
Flowers: March-May
Shepherd's cress (Teesdalia nudicaulis)
Distribution: Introduced west of the Cascades in Washington; British Columbia south to California and in northeastern U.S.
Habitat: Sandy or gravelly soil at low elevations.
Origin: Introduced from Europe
Flowers: April-May
Rosette crinklemat (Tiquilia nuttallii)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Utah.
Habitat: Sagebrush plains.
Origin: Native
Flowers: May-August
Autumn crocus (Colchicum autumnale)
Distribution: Known from Pierce County in Washington; not reported for elsewhere in North America.
Habitat: Lowland grassy meadows, escaping or persisting from cultivation.
Origin: Introduced
Flowers: July-September
Early crocus (Crocus tommasinianus)
Origin: Introduced from southeast Europe
Yellow crocus (Crocus ×stellaris)
Origin: Introduced (garden origin)
Herb of the cross (Verbena officinalis)
Origin: Introduced from Europe
Crossflower (Chorispora tenella)
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.
Origin: Introduced from sw Asia
Flowers: March-June
Crowberry (Empetrum nigrum)
Distribution: In the Cascades and Olympic Mountains of Washington; Alaska south to California.
Habitat: Exposed rocky bluffs, but also in peat bogs.
Origin: Native
Flowers: May-July
Celeryleaved crowfoot (Ranunculus sceleratus)
Distribution: Widely distributed throughout much of Washington; widely distributed throughout much of North America.
Habitat: Moist meadows and boggy shoreland to semi-aquatic and often brackish areas.
Origin: Native
Flowers: May-September
Water crowfoot (Ranunculus aquatilis)
Distribution: Alaska to California, east to Montana and Wyoming
Habitat: In sluggish streams and ponds, low to moderate elevations
Origin: Native
Flowers: May - August
King's crown (Rhodiola integrifolia)
Distribution: In the Cascades and northeastern corner of Washington; Alaska to south to California, east to Colorado.
Habitat: Cliffs, talus and ridges, subalpine to alpine, generally where moist in early summer.
Origin: Native
Flowers: June-August
Purple crown-vetch (Securigera varia)
Distribution: Occurring in scattered locations in Washington; widely distributed throughout much of North America.
Habitat: Disturbed areas including wastelots, roadsides, and fields.
Origin: Introduced
Flowers: June-August
Small crumbweed (Dysphania pumilio)
Distribution: Introduced over much of the United States.
Habitat: Sandy or gravelly soiles, waste areas.
Origin: Introduced from Australia
Flowers: July - September
Crupina (Crupina vulgaris)
Distribution: Introduced in Idaho and Chelan County, Washington
Habitat: Weed or fields and roadsides
Origin: Introduced
Beaked cryptantha (Cryptantha rostellata)
Origin: Native
Common cryptantha (Cryptantha affinis)
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.
Origin: Native
Flowers: June-July
Common cryptantha (Cryptantha intermedia)
Distribution: Washington to California, east to Idaho and Arizona
Habitat: Moderately dry, open slopes
Origin: Native
Flowers: May - September
Cushion cryptantha (Greeneocharis circumscissa)
Distribution: Chiefly east of the Cascades, central Washington to Baja California, east to Utah.
Habitat: Dry, open, usually sandy places in the lowlands.
Origin: Native
Flowers: April - July
Desert cryptantha (Cryptantha scoparia)
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.
Origin: Native
Flowers: May - July
Fendler's cryptantha (Cryptantha fendleri)
Origin: Native
Flowers: May - July
Flaccid cryptantha (Cryptantha flaccida)
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.
Origin: Native
Flowers: May - June
Large-flowered cryptantha (Cryptantha grandiflora)
Origin: Native
Matted cryptantha (Greeneocharis circumscissa)
Distribution: Chiefly east of the Cascades, central Washington to Baja California, east to Utah.
Habitat: Dry, open, usually sandy places in the lowlands.
Origin: Native
Flowers: April - July
Narrow-stem cryptantha (Cryptantha gracilis)
Origin: Native
Obscure cryptantha (Cryptantha ambigua)
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.
Origin: Native
Flowers: June-July
Pinewoods cryptantha (Cryptantha simulans)
Origin: Native
Flowers: June - July
Slender cryptantha (Cryptantha affinis)
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.
Origin: Native
Flowers: June-July
Snake River cryptantha (Oreocarya spiculifera)
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.
Origin: Native
Flowers: May-July
Torrey's cryptantha (Cryptantha torreyana)
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.
Origin: Native
Flowers: May-July
Watson's cryptantha (Cryptantha watsonii)
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.
Origin: Native
Flowers: May-August
Wilke's cryptantha (Cryptantha ambigua)
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.
Origin: Native
Flowers: June-July
Wingnut cryptantha (Cryptantha pterocarya)
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.
Origin: Native
Flowers: April-June
Cuckoo flower (Cardamine pratensis)
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.
Origin: Introduced
Flowers: April-May
Cuckooflower (Cardamine pratensis)
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.
Origin: Introduced
Flowers: April-May
Wild cucumber (Echinocystis lobata)
Distribution: Chiefly east of the Cascades in Washington; occurring throughout much of North America.
Habitat: Moist bottomlands and thickets.
Origin: Introduced
Flowers: July-September
California cudweed (Pseudognaphalium californicum)
Origin: Native
Flowers: June - July
Cotton batting cudweed (Pseudognaphalium stramineum)
Distribution: Widely distributed throughout much of Washington; British Columbia south to California, east to the Great Plains of the U.S.; New York south to South Carolina.
Habitat: Open, usually moist places, often on disturbed soil.
Origin: Native
Flowers: June-October
Cudweed (Filago arvensis)
Distribution: Occurring east of the Cascades crest in Washington; Alaska to Oregon, east to Sasketchewan, Nebraska, Minnesota and Michigan.
Habitat: Dry, open waste land and overgrazed ranges.
Origin: Introduced
Flowers: July-September
Lowland cudweed (Gnaphalium palustre)
Distribution: Widely distributed throughout Washington; British Columbia south to California, east to the Great Plains.
Habitat: Open areas at low elevations where moist at least in spring.
Origin: Native
Flowers: May-October
Marsh cudweed (Gnaphalium uliginosum)
Distribution: Widespread throughout Washington; Alaska south to Oregon, east across the central U.S. and Canada to the Atlantic Coast.
Habitat: Moist areas, streambanks and waste ground.
Origin: Introduced
Flowers: July-October
Purple cudweed (Gamochaeta ustulata)
Distribution: Widespread west of the Cascades in Washington; British Columbia south to California.
Habitat: Usually in sandy soil, often in disturbed areas.
Origin: Native
Flowers: May-October
Slender cudweed (Pseudognaphalium thermale)
Distribution: Occurring on both sides of the Cascades crest in Washingotn; British Columbia south to California, east to Montana and Utah.
Habitat: Dry, sandy banks and ditches, open woods of ponderosa pine and Douglas fir, and mixed deciduous forests.
Origin: Native
Flowers: June-September
Small cudweed (Logfia minima)
Distribution: Native to northern Europe
Habitat: Heaths, sandy areas
Origin: Introduced from Europe
Flowers: June-Sept.
Spoon-leaf cudweed (Gamochaeta ustulata)
Distribution: Widespread west of the Cascades in Washington; British Columbia south to California.
Habitat: Usually in sandy soil, often in disturbed areas.
Origin: Native
Flowers: May-October
Sticky cudweed (Pseudognaphalium macounii)
Origin: Native
Weedy cudweed (Pseudognaphalium luteoalbum)
Distribution: Locally introduced, chiefly west of the Cascades.
Habitat: Disturbed waste ground.
Origin: Introduced
Flowers: June - October
Western marsh cudweed (Gnaphalium palustre)
Distribution: Widely distributed throughout Washington; British Columbia south to California, east to the Great Plains.
Habitat: Open areas at low elevations where moist at least in spring.
Origin: Native
Flowers: May-October
Winded cudweed (Pseudognaphalium macounii)
Origin: Native
Sagittaria cuneaire (Sagittaria cuneata)
Distribution: East of the Cascades in Washington; British Columbia south to California, east to New York.
Habitat: Ponds, lake shores and ditches.
Origin: Native
Flowers: June-August
Booth's sun cup (Eremothera boothii)
Origin: Native
Queen's cup (Clintonia uniflora)
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
Origin: Native
Flowers: May-July
Alpine prickly currant (Ribes montigenum)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Subalpine to alpine ridges, talus slopes and rock crevices.
Origin: Native
Flowers: June-August
American red currant (Ribes triste)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to Oregon, east across the northern half of North America to the Atlantic Coast.
Habitat: Moist woods and rocky slopes at mid- to high elevations in the mountains.
Origin: Native
Flowers: March-June
Blood currant (Ribes sanguineum)
Distribution: Chiefly west of the Cascades in Washington; British Columbia to south to California.
Habitat: Open to wooded, moist to dry valleys and lower mountains.
Origin: Native
Flowers: March-June
California black currant (Ribes bracteosum)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California.
Habitat: Moist to wet woods, low to mid-elevations.
Origin: Native
Flowers: May-June
Cultivated black currant (Ribes nigrum)
Origin: Introduced
Golden currant (Ribes aureum)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains and the Great Plains of the U.S.
Habitat: Moderately moist areas in shrub-steppe to ponderosa pine forests.
Origin: Native
Flowers: April-May
Hall's sticky currant (Ribes viscosissimum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Open to timbered, moist to fairly dry slopes, moderate to high elevations.
Origin: Native
Flowers: May-July
Hudson Bay currant (Ribes hudsonianum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska south to California, east across Canada to the Atlantic Coast, and east in the U.S. to the Rocky Mountains and Great Lakes area.
Habitat: Stream banks, moist woods and meadow margins at mid-elevations in the mountains.
Origin: Native
Flowers: May-July
Maple-leaf currant (Ribes acerifolium)
Distribution: Occurring in the Cascades, Olympic Mountains, and northeastern Washington; Southern British Columbia south to Oregon, east to Idaho.
Habitat: Stream banks, meadowland thickets, open ridges and rock slides, mid-elevations in the mountains to timberline.
Origin: Native
Flowers: June-August
Mountain currant (Ribes viscosissimum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Open to timbered, moist to fairly dry slopes, moderate to high elevations.
Origin: Native
Flowers: May-July
Northern black currant (Ribes hudsonianum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska south to California, east across Canada to the Atlantic Coast, and east in the U.S. to the Rocky Mountains and Great Lakes area.
Habitat: Stream banks, moist woods and meadow margins at mid-elevations in the mountains.
Origin: Native
Flowers: May-July
Northern red currant (Ribes rubrum)
Origin: Introduced
Flowers: April - May
Red currant (Ribes sanguineum)
Distribution: Chiefly west of the Cascades in Washington; British Columbia to south to California.
Habitat: Open to wooded, moist to dry valleys and lower mountains.
Origin: Native
Flowers: March-June
Redflower currant (Ribes sanguineum)
Distribution: Chiefly west of the Cascades in Washington; British Columbia to south to California.
Habitat: Open to wooded, moist to dry valleys and lower mountains.
Origin: Native
Flowers: March-June
Sticky currant (Ribes viscosissimum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Open to timbered, moist to fairly dry slopes, moderate to high elevations.
Origin: Native
Flowers: May-July
Stink currant (Ribes bracteosum)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California.
Habitat: Moist to wet woods, low to mid-elevations.
Origin: Native
Flowers: May-June
Swamp currant (Ribes lacustre)
Distribution: Widely distributed throughout much of Washington; Alaska south to California, east across the northern half of North America to the Atlantic Coast.
Habitat: Moist woods and streambanks to drier forest slopes at low to moderate elevations.
Origin: Native
Flowers: April-July
Swamp red currant (Ribes triste)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to Oregon, east across the northern half of North America to the Atlantic Coast.
Habitat: Moist woods and rocky slopes at mid- to high elevations in the mountains.
Origin: Native
Flowers: March-June
Trailing black currant (Ribes laxiflorum)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains.
Habitat: Wet coastal woods to mid-elevations in the mountains.
Origin: Native
Flowers: April-July
Wax currant (Ribes cereum)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Great Plains.
Habitat: Shrub-steppe and sagebrush desert to sub-alpine ridges.
Origin: Native
Flowers: April-June
Western black currant (Ribes hudsonianum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska south to California, east across Canada to the Atlantic Coast, and east in the U.S. to the Rocky Mountains and Great Lakes area.
Habitat: Stream banks, moist woods and meadow margins at mid-elevations in the mountains.
Origin: Native
Flowers: May-July
Wild red currant (Ribes triste)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to Oregon, east across the northern half of North America to the Atlantic Coast.
Habitat: Moist woods and rocky slopes at mid- to high elevations in the mountains.
Origin: Native
Flowers: March-June
Winaha currant (Ribes wolfii)
Origin: Native
Flowers: Late May - Early July
Wolf's currant (Ribes wolfii)
Origin: Native
Flowers: Late May - Early July
Columbia cut-leaf (Hymenopappus filifolius)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to the Great Plains of Canada and the U.S.
Habitat: Dry, often sandy places in the foothills and plains.
Origin: Native
Flowers: May-July
Cut-leaf-water-parsnip (Berula incisa)
Distribution: East of the Cascades in Washington; British Columbia south to California, east to the Mississippi River.
Habitat: Wet areas, often in water, in valleys and plains.
Origin: Native
Flowers: June-September
Ivy-leaf cyclamen (Cyclamen hederifolium)
Origin: Introduced
Mock cypress (Bassia scoparia)
Distribution: Occurring chiefly east of the Cascades in Washington; British Columbia to California, east across U.S. and Canada to the Atlantic Coast.
Habitat: Roadsides, fields, wastelots, and other dry, distrubed, open areas at low to middle elevations.
Origin: Introduced from eastern Europe and southestern Asia
Flowers: July-September
Summer cypress (Bassia scoparia)
Distribution: Occurring chiefly east of the Cascades in Washington; British Columbia to California, east across U.S. and Canada to the Atlantic Coast.
Habitat: Roadsides, fields, wastelots, and other dry, distrubed, open areas at low to middle elevations.
Origin: Introduced from eastern Europe and southestern Asia
Flowers: July-September