Ranunculaceae
Buttercup Family
21 genera
94 species
33 subspecies and varieties
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Aconitum columbianumColumbian monkshood
Distribution: Alaska to California, east to Montana and New Mexico.
Habitat: Moist woods and meadows, moderate to subalpine elevations.
Origin: Native
Flowers: June-August
ssp. columbianum – 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
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
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
Adonis aestivalissummer pheasant's-eye
Distribution: Introduced and occasionallhy escaping, but marginally persistant; uncommon in the Pacific Northwest.
Habitat: Disturbed areas.
Origin: Introduced from Europe
Flowers: June
Anemone deltoideathreeleaf anemone, Columbian windflower
Distribution: Occurring 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
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
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
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
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
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
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
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, disjunct in the Wenatchee Mountains in Washington.
Habitat: Prairies to mountain slopes, mostly on well-drained soil.
Origin: Native
Flowers: May-August
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
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
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
var. formosa – red Columbine, Sitka Columbine, western Columbine
Aquilegia vulgarisEuropean Columbine
Distribution: Introduced as a garden flower, occasionally escaping.
Habitat: Disturbed soil near gardens.
Origin: Introduced
Flowers: May-July
Arcteranthis cooleyaeCooley's buttercup
Distribution: Alaska and the Cascades of British Columbia, known in Washington from Mt. Colonel Bob in the Olympics and Del Campo Peak Snohomish county.
Habitat: Damp slopes and rocky crevices at high elevations, blossoming as snow recedes.
Origin: Native
Flowers: June-August
Caltha biflorabroadleaved marsh-marigold, twinflowered marsh-marigold
Distribution: Occurring chiefly west of the Cascade crest; Alaska south to California, east to western Nevada.
Habitat: Open wet area in subalpine and alpine marshes and seepages.
Origin: Native
Flowers: June-August
Caltha leptosepalaelkslip
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains.
Habitat: Wet places in subalpine and alpine regions.
Origin: Native
Flowers: May-August
Caltha palustrisyellow marshmarigold
Distribution: Coastal Alaska, south along the coast to Oregon
Habitat: Mostly in coastal bogs
Origin: Both native and introduced populations
Flowers: July-August
Ceratocephala testiculatahornseed buttercup
Distribution: Introduced in all of western United States, and east in the northern half of the United States to Ohio; chiefly east of the Cascades in Washington and Oregon
Habitat: Disturbed soil in sagebrush deserts and plains
Origin: Introduced from Europe
Flowers: March-May
Clematis hirsutissimaDouglas's clematis, leatherflower, sugarbowls, vaseflower
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
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
Clematis occidentalisColumbia clematis, rock clematis, Columbia virgins-bower
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
var. dissecta – Columbia clematis
var. grosseserrata – Columbia clematis
Clematis orientalisOriental clematis, Oriental virginsbower
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
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
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.
Origin: Native
Flowers: April-May
Coptis laciniataOregon goldthread
Distribution: Occurring in the southwestern region of Washington; Washington south to California.
Habitat: Moist woods at low elevations.
Origin: Native
Flowers: April-August
Coptis occidentalisIdaho goldthread, western goldthread
Distribution: Occurring in the northeastern corner of Washington; Adjacent British Columbia east to Idaho and Montana.
Habitat: Moist woods.
Origin: Native
Flowers: April-May
Coptis trifoliathreeleaf goldthread
Distribution: Known from extreme northeastern region of Washington; Alaska to Washington, Idaho and Montana, east across northern North America to the Atlantic; also in Greenland and eastern Eurasia.
Habitat: Deep woodland, often where swampy.
Origin: Native
Flowers: May-August
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
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
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
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
Delphinium distichumtwo-spike larkspur
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to Oregon, east to Montana and Wyoming.
Habitat: Vernally wet swales and meadows, in sagebrush or ponderosa pine forest.
Origin: Native
Flowers: May-July
Delphinium glareosumOlympic larkspur
Distribution: In the Olympic and Cascades mountains of Washington; British Columbia south to Oregon.
Habitat: Alpine and subalpine ridges and talus slopes, sometimes found at lower elevations.
Origin: Native
Flowers: May-August
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
Delphinium leucophaeumpale larkspur
Distribution: Known only from Lewis County in Washington; Lewis County, Washington south to Willamette Valley, Oregon.
Habitat: Bluffs, open ground, and moist lowland meadows where undisturbed.
Origin: Native
Flowers: May-June
Delphinium lineapetalumthin-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.
Flowers: May-June
Delphinium menziesiiMenzies larkspur
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to Oregon.
Habitat: Coastal bluffs and prairies to moist meadows and forest openings at moderate elevations in the mountains.
Origin: Native
Flowers: April-July
Delphinium multiplexKittitas larkspur
Distribution: 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
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-July
Delphinium nuttalliiNuttall's larkspur
Distribution: Occurring west of the Cascades crest from Grays Harbor, Thurston, and Pierce counties south, and east in the Columbia River Gorge to Benton County in Washington; Washington to Willamette Valley in Oregon.
Habitat: Gravelly outwash prairies and basaltic cliffs.
Origin: Native
Flowers: May-June
Delphinium occidentalewestern larkspur
Distribution: Occurring in southeaster 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
Delphinium stachydeumhedgenettle larkspur, spiked larkspur
Distribution: Occurring in southeastern Washington; Washington to northeast California and northern Nevada, east to Idaho.
Habitat: Dry sagebrush to ponderosa or lodgepole pine forests
Origin: Native
Flowers: June-August
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
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 moderate elevations.
Origin: Native
Flowers: April-May
Delphinium viridescensWenatchee larkspur
Distribution: Endemic to the Wenatchee Mountains of Chelan and Kittitas counties in Washington.
Habitat: Boggy meadowlands.
Origin: Native
Flowers: June-July
Delphinium xantholeucumyellow-white larkspur
Distribution: Endemic to Okanogan, Chelan, and Douglas counties in Washington.
Habitat: Dry, grassy hillsides and ponderosa pine forests.
Origin: Native
Flowers: April-June
Enemion halliiWillamette false rue-anemone
Distribution: Lewis and Thurston Counties, Washington, south in the Columbia River Gorge and Willamette Valley to Marion County, Oregon
Habitat: Moist woods and streambanks at low elevations
Origin: Native
Flowers: June - July
Ficaria vernalesser celandine
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
Halerpestes cymbalariaalkali buttercup, seaside buttercup
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout much of North America except southern and southeastern regions of U.S.
Habitat: Ditches, marshes and muddy meadowlands, often where saline or alkaline.
Origin: Native
Flowers: May-August
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
Flowers: February-April
Myosurus ×alopecuroides
Distribution: Occurring east of the Cascades crest in Washington; Washington south, east of the Cascades, to Oregon, east to Idaho.
Habitat: Sagebrush-steppe.
Origin: Native
Flowers: March-May
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
var. borealis – sedge mouse-tail
Myosurus minimustiny mousetail
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south 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
Myosurus sessilisshortstemmed mouse-tail, vernal pool mouse-tail
Distribution: Known from Klickitat County in Washington; South-central Washington south to north-central Oregon, also in central California.
Habitat: Vernal pools.
Origin: Native
Flowers: April-June
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
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
Ranunculus acrismeadow buttercup
Distribution: Occurring chiefly west of the Cascades crest in Washington; widely distributed in the northern half of North America.
Habitat: Moist to well-drained soil at low to moderate elevations.
Origin: Introduced from Europe
Flowers: May-August
Ranunculus alismifoliusplantainleaved buttercup
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Swales, streambanks and moist meadows, moderate to high elevations in the mountains.
Origin: Native
Flowers: May-July
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 to Alberta, Montana and Wyoming.
Habitat: In sluggish streams, ponds, lakes, and mudflats at low to moderate elevations.
Origin: Native
Flowers: May-August
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
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
Ranunculus californicusCalifornia buttercup
Distribution: Occurring along the northwest coast in Washington British Columbia to California.
Habitat: Grassy bluffs along the coast.
Origin: Native
Flowers: April-June
var. californicus – California buttercup
Ranunculus cardiophyllusheart-leaf buttercup
Distribution: Reported from northeastern Washington, but no specimens have been seen; From eastern British Columbia and Alberta to northeastern Washington, in scattered locations eastward in the Rocky Mountains and Great Plains.
Habitat: Wet to dry montane to subalpine meadows.
Origin: Native
Flowers: June-August
Ranunculus eschscholtziisubalpine buttercup
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Montana, Colorado and New Mexico.
Habitat: Meadow and talus slopes at mid- to high elevations in the mountains.
Origin: Native
Flowers: June-August
var. eschscholtzii – Eschscholtz buttercup
var. suksdorfii – Suksdorf buttercup, 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
Ranunculus flammulacreeping buttercup, lesser spearwort
Distribution: Widely distributed on both sides of the Cascades crest in Washington; widely distributed throughout much of North America except in the southern U.S.
Habitat: Mostly in mud, often where brackish, from sea level to mid-elevations in the mountains.
Origin: Native
Flowers: May-July
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
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
Ranunculus grayiarctic buttercup
Distribution: Olympic and Cascade mountains in Washington; scattered from Alaska south to Colorado in the Rocky Mountains.
Habitat: Alpine.
Origin: Native
Flowers: June-August
Ranunculus hebecarpusdowny buttercup
Distribution: Occurring east of the Cascades crest in Washington; eastern Washington and adjacent Idaho, south to Baja California and east to Arizona.
Habitat: Moist to rather dry hillsides and woodlands.
Origin: Native
Flowers: March-May
Ranunculus inamoenusgraceful buttercup
Distribution: Occurring 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
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
Ranunculus muricatusspiny-fruit buttercup
Distribution: Occurring chiefly west of the Cascades crest 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
Ranunculus occidentaliswestern buttercup
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska south 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
var. occidentalis – western buttercup
Ranunculus orthorhynchusstraightbeak buttercup
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to Montana and Utah.
Habitat: Streambanks and moist fields to mountain meadows and slopes.
Origin: Native
Flowers: April-August
var. orthorhynchus – straight-beak buttercup
var. platyphyllus – straight-beak buttercup
Ranunculus parviflorussmall-flower buttercup
Distribution: Sparingly introduced to lowlands of western Washington; Washington south to California; southeastern U.S.
Habitat: Roadsides, fields, urbanized settings, and other disturbed areas.
Origin: Introduced from Europe
Flowers: April-June
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
Ranunculus populagomountain buttercup
Distribution: In two discrete locations in Washington (Pierce County and Blue Mountains); 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
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
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
Ranunculus sardoushairy buttercup
Distribution: Occurring west of the Cascade in Washington; British Columbia to northern California, eastern United States, Europe, Australia and Pacific Islands.
Habitat: Disturbed areas, fields and open woods.
Origin: Introduced from Europe
Flowers: May-July
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
var. multifidus – celery-leaved buttercup
var. sceleratus – celery-leaved buttercup
Ranunculus triternatusobscure buttercup
Distribution: Known from Klickitat County in Washington; southcentral Washington to Wasco County, Oregon.
Habitat: Sagebrush slopes.
Origin: Native
Flowers: March-April
Ranunculus uncinatuslittle buttercup
Distribution: Widely distributed throughout Washington; Alaska to California, east to Montana and New Mexico.
Habitat: Moist, usually shady areas, sea level to mid-elevations in the mountains.
Origin: Native
Flowers: April-July
Thalictrum dasycarpumpurple meadow-rue
Distribution: Occurring in the northeastern corner of Washington; Alberta south to Arizona, east to central North America.
Habitat: Meadowlands and moist woods.
Origin: Native
Flowers: May-July
Thalictrum occidentalewestern meadow rue
Distribution: Occurring on both sides of the Cascades 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
Thalictrum venulosumveiny-leaf meadow-rue
Distribution: Occurring 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
Trautvetteria caroliniensisfalse bugbane, wild bugbane
Distribution: Widely distributed throughout 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
Trollius albifloruswestern globeflower
Distribution: Chiefly in the Olympics and Cascades mountains of 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