Ranunculaceae
Buttercup Family
21 genera
95 species
33 subspecies and varieties
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Aconitum columbianumColumbian monkshood
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains.
Habitat: Moist woods and meadows, moderate to subalpine elevations.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
ssp. columbianum – Columbian monkshood
Actaea elatatall bugbane
Distribution: Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; British Columbia to Oregon.
Habitat: Moist, shady woods at low elevations.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
var. elata – tall bugbane
Actaea laciniatacut-leaved bugbane, Mt. Hood bugbane
Distribution: Occurring west of the Cascades crest in southwestern Washington; southwestern Washington to adjacent northwestern Oregon.
Habitat: Moist woods at middle elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Actaea rubrabaneberry
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the northern Great Plains, Great Lakes region, and northeastern North America.
Habitat: Moist woods and streambanks from low elevations to middle elevations in the mountains.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
Adonis aestivalissummer pheasant's-eye
Distribution: Occurring east of the Cascades crest in Washington; central Washington to California, east to Montana, Idaho, and Utah.
Habitat: Disturbed areas.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Annual
Anemone deltoideathreeleaf anemone, Columbian windflower
Distribution: Occurring chiefly west of the Cascades crest and east in the Columbia River Gorge in Washington; Washington to California.
Habitat: Dry to moist woodlands at low to middle elevations.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
Anemone drummondiiDrummond's anemone, Drummond's windflower
Distribution: Occurring in the Olympic and Cascade Mountains in Washington; Alaska to California, east to Montana and Wyoming.
Habitat: Subalpine to alpine meadows.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
var. drummondii – Drummond's anemone, Drummond's windflower
Anemone lyalliilittle mountain anemone, Lyall's anemone, Lyall's windflower
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California.
Habitat: Low elevation prairies to subalpine ridges.
Origin: Native
Flowers: March-July
Growth Duration: Perennial
Anemone multifidacliff anemone, Pacific anemone
Distribution: Occurring on both sides of the Cascades crest and in the Olympic Mountains in Washington; Alaska to California, east to the northern Great Plains, Great Lakes region, and northeastern North America.
Habitat: From forest openings in the foothills to alpine meadows.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
var. multifida – cliff anemone, Pacific anemone, Pacific windflower
var. saxicola – hirsute anemone, hirsute windflower
Anemone occidentalismountain pasqueflower, western pasqueflower
Distribution: Occurring in the Olympic and Cascade mountains in Washington; British Columbia to California, east to Alberta, Montana, Idaho, and the Wallowa Mountains of Oregon.
Habitat: Open slopes and meadows from middle elevations to the alpine.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Anemone oreganaOregon anemone, Oregon windflower
Distribution: Occurring in forested areas on both sides of the Cascades crest in Washington; Washington to northern California.
Habitat: Moist, open woods, low to mid-elevations in the mountains, also in marshes and bogs along the coast.
Origin: Native
Flowers: March-June
Growth Duration: Perennial
var. felix – Oregon anemone, western wood anemone
var. oregana – Oregon anemone, western wood anemone
Anemone parvifloranorthern anemone, small-flowered anemone, northern windflower
Distribution: Occurring on both sides of the Cascades crest in the North Cascades in Washington; Alaska to northern Washington, east to Montana and Wyoming, in scattered locations in Utah and Colorado, and also east across northern Canada to the Atlantic Coast.
Habitat: Mountain meadows and subalpine stream banks.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Anemone patenspasqueflower, prairie-crocus
Distribution: Occurring east of the Cascades crest in the Wenatchee Mountains in Washington, where disjunct from the main species range; Alaska, south in the Rocky Mountains to New Mexico, east to the northern Great Plains and the Great Lakes region.
Habitat: Prairies to mountain slopes, mostly on well-drained soil.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
var. multifida – cliff anemone
Anemone piperiPiper's anemone, Piper's windflower
Distribution: Occurring east of the Cascades crest in Washington in the far eastern part of the state; Washington to northeast Oregon east to Idaho and western Montana.
Habitat: Shady woods at moderate elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Aquilegia flavescensyellow columbine
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east to the Rocky Mountains.
Habitat: Moist mountain meadows and talus to alpine slopes
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Aquilegia formosared columbine, Sitka columbine
Distribution: Widely distributed on both sides of the Cascades crest throughout Washington; Alaska to California, coastal and inland to Alberta and Wyoming.
Habitat: Open woods, from the lowlands to moderate elevations in the mountains.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
var. formosa – red columbine, Sitka columbine, western columbine
Aquilegia ×minianahybrid columbine
Distribution: Occurring east of the Cascades crest in central Washington; British Columbia to Washington, east to Idaho.
Habitat: Moist mountain meadows and talus to alpine slopes.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Aquilegia vulgarisEuropean Columbine
Distribution: Introduced as a garden flower, occasionally escaping.
Habitat: Disturbed soil near gardens.
Origin: Introduced
Flowers: May-July
Growth Duration: Perennial
Arcteranthis cooleyaeCooley's buttercup
Distribution: Occurring west of the Cascades crest in Washington; Alaska to Washington.
Habitat: Damp slopes and rocky crevices at high elevations, blossoming as snow recedes.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Caltha biflorabroad-leaved marsh-marigold, twin-flowered marsh-marigold
Distribution: Occurring chiefly west of the Cascade crest in Washington; Alaska to California, east to western Nevada.
Habitat: Open wet area in subalpine and alpine marshes and seepages.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Caltha leptosepalaelkslip
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the western Montana.
Habitat: Wet places in subalpine and alpine regions.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Caltha palustrisyellow marsh-marigold
Distribution: Coastal Alaska, south along the coast to Oregon
Habitat: Mostly in coastal bogs
Origin: Both native and introduced populations
Flowers: July-August
Growth Duration: Perennial
Ceratocephala testiculatahornseed buttercup
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Great Plains.
Habitat: Disturbed soil in sagebrush deserts and plains.
Origin: Introduced from Europe
Flowers: March-May
Growth Duration: Annual
Clematis hirsutissimaDouglas's clematis, leatherflower, sugarbowls, vaseflower
Distribution: Occurring east of the Cascades crest in eastern Washington; Washington to Oregon, east to Montana, south to Arizona and New Mexico.
Habitat: Meadows, grasslands, and forest openings.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
var. hirsutissima – Douglas' clematis
Clematis ligusticifoliawestern clematis
Distribution: Chiefly east of the Cascades crest in Washington; British Columbia south to California, east to Oklahoma and the Dakotas.
Habitat: River valleys and sagebrush desert to ponderosa pine forests.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Clematis occidentalisColumbia clematis, rock clematis, Columbia virgin's bower
Distribution: Occurring east of the Cascades crest in Washington; British Columbia 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
Growth Duration: Perennial
var. dissecta – Columbia clematis
var. grosseserrata – Columbia clematis
Clematis orientalisOriental clematis, Oriental virgin's bower
Distribution: Known from Yakima County in Washington; also known from the Columbia River Gorge area in Oregon, and other scattered locations in southwestern North America.
Habitat: Disturbed open areas at low elevations.
Origin: Introduced
Flowers: June-July
Growth Duration: Perennial
Clematis vitalbaevergreen clematis, old-man's beard, traveler's-joy
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to Oregon, also in scattered locations in eastern North America.
Habitat: Forest edge, hillsides, parks, wastelots, and other disturbed sites.
Origin: Introduced; native to Europe and Africa
Flowers: June-September
Growth Duration: Perennial
Coptis aspleniifoliafern-leaf goldthread
Distribution: Occurring west of the Cascades crest in Washington; Alaska south along the coast to Washington.
Habitat: Moist woods and bogs at low elevations.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
Coptis laciniataOregon goldthread
Distribution: Occurring west of the Cascades crest from the Olympic Peninsula south in Washington; Washington to California.
Habitat: Moist woods at low elevations.
Origin: Native
Flowers: April-August
Growth Duration: Perennial
Coptis occidentalisIdaho goldthread, western goldthread
Distribution: Occurring east of the Cascades crest in the northeastern region of Washington; adjacent British Columbia to Idaho and Montana.
Habitat: Moist woods.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
Coptis trifoliathreeleaf goldthread
Distribution: Occurring west of the Cascades crest in Washington in the northwest corner of the Olympic Peninsula. Alaska to Washington, Idaho and Montana, east across northern North America to the Atlantic; disjunct in Clackamas County, Oregon; also in Greenland and eastern Eurasia.
Habitat: Deep woodland, often where swampy.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Delphinium ajacisdoubtful knight's-spur
Distribution: Limited in distribution to a few localities west of the Cascades in Washington; widely distributed throughout much of North America.
Habitat: Drainage ditches, roadsides, old home sites, waste areas.
Origin: Introduced
Flowers: June-July
Growth Duration: Annual
Delphinium basalticumbasaltic larkspur
Distribution: Occurring in the Columbia River Gorge in Washington; southcentral Washington and adjacent Oregon.
Habitat: Basaltic cliff faces, outcropping, and exposed slopes.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Delphinium ×burkeiBurke's larkspur
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Moist meadows and seasonally damp open sagebrush and ponderosa pine forests.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Delphinium depauperatumslim larkspur
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Montana, Idaho, and Nevada.
Habitat: From vernally moist sagebrush valleys to subalpine meadows.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Delphinium distichumtwo-spike larkspur
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Oregon, east to Montana and Wyoming.
Habitat: Vernally wet swales and meadows, in sagebrush or ponderosa pine forest.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Delphinium glareosumOlympic larkspur
Distribution: Occurring in the Olympics and Cascades Range in Washington; British Columbia to Oregon.
Habitat: Alpine and subalpine ridges and talus slopes, sometimes found at lower elevations.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Delphinium glaucumpale larkspur
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains and the Canadian Great Plains.
Habitat: Meadows and wet thickets, bogs, streambanks, and coniferous forest openings at middle elevations in the mountains.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Delphinium leucophaeumpale larkspur
Distribution: Occurring west of the Cascades crest in Washington, where known only from Lewis County in Washington; Lewis County, Washington to Willamette Valley, Oregon.
Habitat: Bluffs, open ground, and moist lowland meadows where undisturbed.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Delphinium lineapetalumline-petaled larkspur
Distribution: Occurring east of the Cascades crest, where endemic to Chelan and Kittitas counties.
Habitat: Meadows and forest edge from lowland valleys to lower mountain slopes.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Delphinium menziesiiMenzies larkspur
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon.
Habitat: Coastal bluffs and prairies to moist meadows and forest openings at moderate elevations in the mountains.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
Delphinium multiplexKittitas larkspur
Distribution: Occurring east of the Cascades crest in Washington, where endemic to Chelan, Kittitas, and Yakima counties in Washington.
Habitat: Along rocky, usually intermitant streams or springs in sagebrush hills to moderate elevations in the mountains.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Delphinium nuttallianumthin-petal larkspur, upland larkspur
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Dry, gravelly ground, sagebrush deserts to the ponderosa pine region in the mountains.
Origin: Native
Flowers: March-August
Growth Duration: Perennial
Delphinium nuttalliiNuttall's larkspur
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; Washington to Willamette Valley, Oregon.
Habitat: Gravelly outwash prairies and basaltic cliffs.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Delphinium occidentalewestern larkspur
Distribution: Occurring east of the Cascades crest in southeastern Washington; Washington to northeastern Nevada, east to Montana, Wyoming, Colorado, and Utah.
Habitat: Montane meadows and thickets, bogs, and streamsides.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
var. occidentale – western larkspur
Delphinium stachydeumhedge nettle larkspur, spiked larkspur
Distribution: Occurring east of the Cascades crest in southeastern Washington; southeastern Washington to northeast California, east to Idaho and northern Nevada.
Habitat: Dry sagebrush to ponderosa or lodgepole pine forests
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Delphinium sutherlandiiSutherland's larkspur
Distribution: Occurring in northeastern Washington; southeastern British Columbia and adjacent Washington, east across northern Idaho to northwestern Montana.
Habitat: Dry meadows and open conifer forests.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Delphinium trolliifoliumcow-poison, poison larkspur
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 middle elevations.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
Delphinium viridescensWenatchee larkspur
Distribution: Occurring east of the Cascades crest in Washington, where endemic to the Wenatchee Mountains of Chelan and Kittitas counties.
Habitat: Boggy meadowlands.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Delphinium xantholeucumyellow-white larkspur
Distribution: Occurring east of the Cascades crest in Washington, where endemic to Okanogan, Chelan, and Douglas counties.
Habitat: Dry, grassy hillsides and ponderosa pine forests.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Enemion halliiWillamette false rue-anemone
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; Lewis and Thurston counties, south to Marion County, Oregon
Habitat: Moist woods and streambanks at low elevations
Origin: Native
Flowers: June - July
Growth Duration: Perennial
Ficaria vernalesser celandine
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to Oregon, also in eastern North America.
Habitat: Disturbed areas generally at low elevations, often where seasonally moist in the spring.
Origin: Introduced from Europe
Flowers: April-May
Growth Duration: Perennial
Halerpestes cymbalariaalkali buttercup, seaside buttercup
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Great Plains, Great Lakes, and northeastern North America.
Habitat: Ditches, marshes and muddy meadowlands, often where saline or alkaline.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Helleborus foetidusstinking hellebore
Distribution: Currently only known from lowland western Washington.
Habitat: Disturbed sites near urban or suburban areas, where escaped from cultivation.
Origin: Introduced from Eurasia
Flowers: February-April
Growth Duration: Perennial
Myosurus ×alopecuroideshybrid mouse-tail
Distribution: Occurring east of the Cascades crest in Washington; eastern Washington to California, east to Elmore County, Idaho.
Habitat: Verrnal pools and alkali flats in sagebrush desert.
Origin: Native
Flowers: March-May
Growth Duration: Annual
Myosurus apetalusbristly mouse-tail, sedge mouse-tail
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Wyoming.
Habitat: Moist areas and vernal streambeds, mostly low elevation grasslands and sagebrush, occasionally to subalpine.
Origin: Native
Flowers: March-June
Growth Duration: Annual
var. borealis – sedge mouse-tail
Myosurus minimustiny mouse-tail
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to south-central Canada and across the central U.S. to the southeastern states.
Habitat: Wet places, especially vernal pools.
Origin: Native
Flowers: April-June
Growth Duration: Annual
Myosurus sessilisshor-tstemmed mouse-tail, vernal pool mouse-tail
Distribution: Occurring east of the Cascades crest in Washington, where known from Klickitat County in Washington; South-central Washington to north-central Oregon, also in central California.
Habitat: Vernal pools.
Origin: Native
Flowers: April-June
Growth Duration: Annual
Nigella damascenadevil-in-the-bush, love-in-a-mist
Distribution: Known sparingly in Washington from lowland areas west of Cascades crest; southwestern British Columbia to California, east across northern U.S. to eastern North America.
Habitat: Yard waste dump sites, disturbed open ground, and other sites were plants escape from cultivation.
Origin: Introduced from Eurasia
Flowers: May-September
Growth Duration: Annual
Ranunculus abortivuskidney-leaf buttercup
Distribution: Occurring in the northeastern region of Washington; Yukon Territory to the southern Rocky Mountains and Gulf Coast, east to the Atlantic coast.
Habitat: Montane forest understory and meadows.
Origin: Native
Flowers: July
Growth Duration: Biennial, Perennial
Ranunculus acrismeadow buttercup
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, east across the northern part of the U.S. and Canada to eastern North America.
Habitat: Moist to well-drained soil at low to middle elevations.
Origin: Introduced from Europe
Flowers: May-August
Growth Duration: Perennial
Ranunculus alismifoliusplantain-leaved buttercup
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Swales, streambanks and moist meadows, low to high elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
var. alismellus – dwarf plantain-leaved buttercup
var. alismifolius – plantain-leaved buttercup
var. hartwegii – Hartweg's buttercup
Ranunculus aquatiliswhite western buttercup, water crowfoot, white water crowfoot
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: In sluggish streams, ponds, lakes, and mudflats at low to moderate elevations.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
var. aquatilis – white water buttercup
var. diffusus – water buttercup
Ranunculus arvensisfield buttercup, hungerweed
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Idaho and Utah; also in areas of central and eastern U.S.
Habitat: Dry woodlands and waste ground.
Origin: Introduced from Europe
Flowers: May-June
Growth Duration: Annual
Ranunculus basalticusbasalt buttercup
Distribution: Occurring east of the Cascades crest in Washington, where endemic to Kittitas, Yakima, and Klickitat counties.
Habitat: Sagebrush desert, grassy slopes, and open Quercus garryana forests.
Origin: Native
Flowers: March-June
Growth Duration: Perennial
Ranunculus bulbosusSt. Anthony's-turnip, bulbous buttercup
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California, also widespread in eastern North America.
Habitat: Disturbed open areas at low elevation.
Origin: Introduced from Europe
Flowers: May-June
Growth Duration: Perennial
Ranunculus californicusCalifornia buttercup
Distribution: Occurring west of the Cascades crest along the northwestern coast in Washington; British Columbia to California.
Habitat: Grassy bluffs along the coast.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
var. californicus – California buttercup
Ranunculus cardiophyllusheart-leaf buttercup
Distribution: Reported from northeastern Washington, but no specimens have been seen; eastern British Columbia, south in the Rocky Mountains to Arizona and New Mexico, east to Alberta and the northern Great Plains.
Habitat: Wet to dry montane to subalpine meadows.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Ranunculus eschscholtziisubalpine buttercup
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains.
Habitat: Meadow and talus slopes at mid- to high elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
var. eschscholtzii – Eschscholtz buttercup
var. suksdorfii – Suksdorf's buttercup
Ranunculus flabellarisyellow water buttercup
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to northern California, east to the Rocky Mountain states and in central and eastern North America.
Habitat: Shallow ponds, mud flats and marshes at low elevations.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Ranunculus flammulacreeping buttercup, lesser spearwort
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast.
Habitat: Mostly in mud, often where brackish, from sea level to mid-elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
var. flammula – creeping spearwort
var. ovalis – creeping spearwort
var. reptans – creeping spearwort
Ranunculus glaberrimussagebrush buttercup
Distribution: Occurring chiefly east of the Cascades in Washington, with disjunct populations in the northeast Olympic Mountains and Ross Lake area of Whatcom County; British Columbia to northern California, east to the Great Plains.
Habitat: Sagebrush desert, shrub-steppe and ponderosa pine woodlands.
Origin: Native
Flowers: March-June
Growth Duration: Perennial
var. ellipticus – sagebrush buttercup
var. glaberrimus – sagebrush buttercup
Ranunculus gmeliniiGmelin's buttercup, small yellow water buttercup
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska south to Nevada, east to the Rocky Mountains, and across Canada to the Atlantic Coast.
Habitat: Standing water up to 2 meters deep.
Origin: Native
Flowers: May-September
Growth Duration: Perennial
Ranunculus grayiarctic buttercup
Distribution: Occurring in the Olympics and Cascades mountains in Washington; Alaska to Oregon, east to Alberta, Montana, Wyoming and Colorado.
Habitat: Alpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Ranunculus hebecarpusdowny buttercup
Distribution: Occurring east of the Cascades crest in Washington; Washington to Baja California, east to Idaho and Arizona.
Habitat: Moist to rather dry hillsides and woodlands.
Origin: Native
Flowers: March-May
Growth Duration: Annual
Ranunculus inamoenusgraceful buttercup
Distribution: Occurring east of the Cascades crest in northeastern Washington; British Columbia to Nevada and Arizona, east to Montana, Wyoming, Colorado and New Mexico, also in scattered areas of the northern Great Plains.
Habitat: Mountain meadows and moist slopes.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
var. inamoenus – unlovely buttercup
Ranunculus macouniiMacoun's buttercup
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains and northern Great Plains and central Canada; also in Canadian Maritimes.
Habitat: Riparian areas and wet meadows from lowlands to montane.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Ranunculus muricatusspiny-fruit buttercup
Distribution: Occurring chiefly west of the Cascades crest and in the Columbia River Gorge in Washington; Washington to California, east across North America in scattered locations.
Habitat: Ditches and other moist places, often on cultivated land.
Origin: Introduced from Europe
Flowers: April-June
Growth Duration: Annual, Biennial, Perennial
Ranunculus occidentaliswestern buttercup
Distribution: Occurring chiefly west of the Cascades crest and east in the Columbia River Gorge in Washington; Alaska to California, east to Alberta and Nevada.
Habitat: Moist to well-drained soil, low to mid-elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
var. occidentalis – western buttercup
Ranunculus orthorhynchusstraight-beak buttercup
Distribution: Occurring on both sides of the Cascades crest in Washington; southeastern Alaska to California, east to Idaho, western Montana, western Wyoming, Utah, and Nevada.
Habitat: Streambanks and moist fields to mountain meadows and slopes.
Origin: Native
Flowers: April-August
Growth Duration: Perennial
var. orthorhynchus – straight-beak buttercup
var. platyphyllus – straight-beak buttercup
Ranunculus parviflorussmall-flower buttercup
Distribution: Sparingly introduced to lowlands of west of the Cascades crest in Washington; Washington to California; also in the southeastern U.S.
Habitat: Roadsides, fields, urbanized settings, and other disturbed areas.
Origin: Introduced from Europe
Flowers: April-June
Growth Duration: Annual
Ranunculus pensylvanicusPennsylvania buttercup
Distribution: Occurring on both sides of the Cascade crest in Washington; Alaska to Washington, Idaho and Montana; also in eastern North America and scattered areas in the Southwest.
Habitat: Wet ground, especially along streams.
Origin: Native
Flowers: June-July
Growth Duration: Annual, Perennial
Ranunculus populagomountain buttercup
Distribution: Occurring chiefly east of the Cascades crest in southeastern Washington; Washington to California, east to Idaho and western Montana.
Habitat: Wet areas at mid- to high elevations in the mountains.
Origin: Native
Flowers: April-August
Growth Duration: Perennial
Ranunculus pygmaeusdwarf buttercup
Distribution: Occurring east of the Cascades crest in north-central Washington; Alaska to Washington, Idaho and the Rocky Mountains, east across northern Canada to Greenland, and Europe.
Habitat: Alpine meadows and rock crevices, generally near snowbanks.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Ranunculus repenscreeping buttercup
Distribution: Occurring throughout Washington, but more common west of the Cascades crest; Alaska to California and Utah, and from central plains of U.S. to Labrador.
Habitat: Wet meadows and fields, riparian corridors disturbed forest understory, lawns, and other disturbed areas where often moist.
Origin: Introduced from Europe
Flowers: April-August
Growth Duration: Perennial
Ranunculus sardoushairy buttercup
Distribution: Occurring west of the Cascade in Washington; British Columbia to northern California; also in the eastern United States, Europe, Australia and Pacific Islands.
Habitat: Disturbed areas, fields and open woods.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Annual, Biennial, Perennial
Ranunculus sceleratusblister buttercup, celery-leaved buttercup, celery-leaved crowfoot
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
Growth Duration: Perennial
var. multifidus – celery-leaved buttercup
var. sceleratus – celery-leaved buttercup
Ranunculus triternatusDalles Mountain buttercup, obscure buttercup
Distribution: Occurring east of the Cascades crest in Washington, where known from Klickitat County; south-central Washington to Wasco County, Oregon.
Habitat: Sagebrush slopes.
Origin: Native
Flowers: (December) January-April
Growth Duration: Perennial
Ranunculus uncinatuslittle buttercup
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains.
Habitat: Moist, usually shady areas, sea level to mid-elevations in the mountains.
Origin: Native
Flowers: April-July
Growth Duration: Annual, Perennial
Thalictrum dasycarpumpurple meadow-rue
Distribution: Occurring in the northeastern corner of Washington; Alberta to Arizona, east to central North America.
Habitat: Meadowlands and moist woods.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Thalictrum occidentalewestern meadow-rue
Distribution: Occurring on both sides of the Cascades crest in Washington; Yukon Territory to northern California, east to Montana and Colorado.
Habitat: Shady woodlands and forests, from low elevations to mid-elevations in the mountains.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Thalictrum venulosumveiny-leaf meadow-rue
Distribution: Occurring chiefly east of the Cascades crest in Washington; Yukon Territory to Nevada, Utah, and New Mexico, east to eastern North America.
Habitat: Riparian areas, coniferous forest understory.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Trautvetteria caroliniensisfalse bugbane, wild bugbane
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains, also in central and southeastern U.S.
Habitat: Moist, open woods and stream banks, low to mid-elevations in the mountains.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Trollius albifloruswestern globeflower
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Washington, east to the Rocky Mountains.
Habitat: Subalpine and alpine wet meadows and slopes, blooming as the snow recedes.
Origin: Native
Flowers: May-August
Growth Duration: Perennial