Vascular Plants

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


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Scientific names beginning with R:
26 genera
137 species, 46 subspecies and varieties
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Rainiera strictafalse silverback
Distribution: Occurring on both sides of the Cascades crest from Stevens Pass area south; central Washington to Oregon.
Habitat: Meadows and moist, open hillsides at middle to high elevations in the mountains.
Origin: Native
Flowers: July-Septermber
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
Raphanus raphanistrumjointed charlock, wild radish
Distribution: Occurring in scattered locations chiefly west of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast.
Habitat: Roadsides, fields, ditches, wastelots, and other distrubed, open areas at low elevations.
Origin: Introduced, probably from the Mediterranean region
Flowers: May-October
Raphanus sativusgarden radish
Distribution: Occurring in scattered locations throughout Washington; widely distributed throughout North America.
Habitat: Waste places.
Origin: Introduced, probably from Mediterranean Europe
Flowers: May-July
Ratibida columniferaprairie coneflower, redspike Mexican-hat, Upright prairie coneflower
Distribution: Occurring east of the Cascades crest in southeastern Washington; southeast British Columbia and southeastern Washington, east to the Rocky Mountains, and further east across North America to the Atlantic Coast.
Habitat: Prairies, plains and waste ground at low to middle elevations.
Origin: Introduced
Flowers: June-August
Redfieldia flexuosablowout grass
Origin: Introduced from central United States
Reseda albawhite upright mignonette
Distribution: Introduced sparingly in Washington, usually along the coast; British Columbia south to California; upper central and eastern North America.
Habitat: Disturbed ground.
Origin: Introduced from Europe
Flowers: May-October
Reseda luteolayellow dye, Dyer's rocket, weld
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California; scattered locations in central and eastern North America.
Habitat: Disturbed ground at low elevations.
Origin: Introduced from Europe
Flowers: May-September
Rhamnus alnifoliaalder-leaf buckthorn
Distribution: Occurring in the northeast corner of Washington; British Columbia east to Quebec, east of the Cascades to Idaho, Montana and the central Sierra Nevada of California.
Habitat: Moist ground, expecially along streams, at moderate to mid-elevations in the mountains.
Origin: Native
Flowers: June-July
Rhamnus catharticacommon buckthorn
Origin: Introduced
Rhaponticum repenshardheads, creeping knapweed, Russian knapweed
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Disturbed dry slopes, meadows, fields, forest openings, and other disturbed, open places from low to middle elevations.
Origin: Introduced from central Asia
Flowers: June-September
Rheum rhabarbarumrhubarb
Distribution: Occurring in scattered locations on both sides of the Cascades crest; Alaska an Yukon Territory, Rocky Mountain states, and eastern North America.
Habitat: Open, disturbed areas, often associated with former homesteads.
Origin: Introduced
Flowers: May-June
Rhinanthus minorlittle yellow rattle
Distribution: Both sides of the Cascades in Washington; Alaska to Newfoundland, south to upper Midwest and New England; circumboreal.
Habitat: Moist meadows, forest openings, and roadsides at low to middle elevations, sometimes in subalpine.
Origin: Native
Flowers: June-August
Rhodiola integrifoliaking's crown, midsummer-men, roseroot
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
ssp. integrifolia – King's crown, roseroot
Rhododendron albiflorumwhite rhododendron
Distribution: British Columbia to Oregon, east to Montana
Habitat: Moist, usually forested, slopes, mid- to high elevations in the mountains
Origin: Native
Flowers: June - August
Rhododendron columbianummt. Labrador tea, smooth Labrador tea, western Labrador tea
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia and Alberta south to California, east to Montana, Wyoming, and Utah.
Habitat: Swamps and bogs, lowlands to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Rhododendron groenlandicumbog Labrador-tea, rusty Labrador-tea
Distribution: Occurring west of the Cascades crest in Washington; Alaska to Oregon and Idaho, east across Canada and the Great Lakes region to northeastern North America.
Habitat: Swamps and bogs at low to middle elevations.
Origin: Native
Flowers: June-August
Rhododendron macrophyllumCalifornia rhododendron, Pacific rhododendron
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California.
Habitat: Moist woods, sea level to moderate elevations in the mountains.
Origin: Native
Flowers: May-July
Rhododendron menziesiifalse azalea, fool's huckleberry, rusty menziesia
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Alberta, Idaho, Montana, and Wyoming.
Habitat: Forest understory and edges from middle elevations to the subalpine.
Origin: Native
Flowers: April-June
Rhus glabrasmooth sumac
Distribution: East of the Cascades in Washington; British Columbia to Mexico, east to New Hampshire and Georgia.
Habitat: Dry hillsides and draws, low to moderate elevations.
Origin: Native
Flowers: April-July
Rhus typhinastaghorn sumac
Origin: Introduced
Rhynchospora albawhite beakrush
Distribution: Alaska to California, east to Idaho, and throughout northeastern United states.
Habitat: Sphagnum bogs and other wet places, lowlands to mid-elevations in the mountains
Origin: Native
Flowers: July - August
Ribes acerifoliummaple-leaf currant
Distribution: Occurring chiefly west of the Cascades crest in Washington; southern British Columbia to Oregon, east to Idaho.
Habitat: Stream banks, meadowland thickets, open ridges and rock slides, from middle elevations in the mountains to timberline.
Origin: Native
Flowers: June-August
Ribes aureumgolden currant
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to across most of North America to the Atlantic Coast.
Habitat: Sagebrush desert where seasonally moist to ponderosa pine forest openings at middle elevations.
Origin: Native
Flowers: April-May
var. aureum – golden currant
Ribes bracteosumCalifornia black currant, stink currant
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California.
Habitat: Moist to wet woods, from low to middle elevations.
Origin: Native
Flowers: May-June
Ribes cereumwax currant
Distribution: Widespread east of the Cascades crest in Washington; British Columbia to California, east to the Great Plains.
Habitat: Shrub-steppe and sagebrush desert to sub-alpine ridges.
Origin: Native
Flowers: April-June
var. cereum – wax currant
var. colubrinum – wax currant
Ribes divaricatumcoast black gooseberry, straggly gooseberry
Distribution: Occurring chiefly west of the Cascades crest in Washington and along the Columbia River Gorge; British Columbia south to California.
Habitat: Moist hillsides, prairies and open woods at low elevations.
Origin: Native
Flowers: April-May
var. divaricatum – coast black gooseberry
Ribes hudsonianumHudson Bay currant, northern black currant, western black currant
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, Canadian Great Plains, Great Lakes region, and eastern Canada.
Habitat: Stream banks, moist woods and meadow margins at middle elevations in the mountains.
Origin: Native
Flowers: May-July
Ribes inermewhitestem gooseberry
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Moist forest edges and openings in the mountains, riparian corridors at lower elevations.
Origin: Native
Flowers: May-June
var. inerme – whitestem gooseberry
Ribes lacustreswamp currant, bristly black gooseberry, swamp gooseberry
Distribution: Occurring in forested and mountainous areas on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, Great Plains, and eastern North America.
Habitat: Moist forests and stream banks to forestd slopes and subalpine ridges.
Origin: Native
Flowers: April-July
Ribes laxiflorumtrailing black currant
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains.
Habitat: Wet coastal woods from low to middle elevations in the mountains.
Origin: Native
Flowers: April-July
Ribes lobbiigummy gooseberry, Lobb's gooseberry, Oregon gooseberry
Distribution: Occurring chiefly east of the Cascades crest in Washington, but occasionally found to the coast; British Columbia south to California.
Habitat: Lowland valleys to open forests at moderate elevations in the mountains.
Origin: Native
Flowers: April-June
Ribes montigenumalpine prickly currant, mountain gooseberry, western prickly gooseberry
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
Ribes nigrumcultivated black currant
Origin: Introduced
Ribes niveumSnake River gooseberry, snow gooseberry
Distribution: Occurring in the southeastern corner of Washington; Washington south to Oregon and Nevada, east to Idaho and Colorado.
Habitat: Usually in thickets along streams, but somedtimes on open hllsides.
Origin: Native
Flowers: April-May
Ribes oxyacanthoidesCanada gooseberry
Distribution: East of the Cascades in Washington chiefly in the northeatern and southeastern portions of the state; Alaska to Oregon, east to the Atlantic Coast in the northern half of North America.
Habitat: Prairies and lower mountains.
Origin: Native
Flowers: May-June
var. cognatum – northern gooseberry, umatilla gooseberry, Umatilla gooseberry
var. irriguum – Idaho gooseberry
Ribes rubrumnorthern red currant
Origin: Introduced
Flowers: April - May
Ribes sanguineumblood currant, red currant, red flowering currant
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California.
Origin: Native
Flowers: March-June
var. sanguineum – blood currant, red currant, red flowering currant
Ribes tristeAmerican red currant, swamp red currant, wild red currant
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to Oregon, east to the northern Great Plains, Great Lakes region, and northeastern North America.
Habitat: Moist woods and rocky slopes at middle to high elevations in the mountains.
Origin: Native
Flowers: April-June
Ribes velutinumdesert gooseberry, Goodding's gooseberry
Distribution: Occurring in the southeastern corner of Washington; Washington south to California, east to Montana, Idaho, Nevada, Utah, and Arizona.
Habitat: Open areas in sagebrush-steppe and Ponderosa pine forests.
Origin: Native
Flowers: March-May
Ribes viscosissimumHall's sticky currant, mountain currant
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Open to forested, moist to fairly dry slopes, from middle to high elevations.
Origin: Native
Flowers: May-July
Ribes watsonianumMount Adams gooseberry, spring gooseberry, wastson gooseberry
Distribution: Chiefly east of the Cascades crest in Washington; British Columbia south to Oregon, east to Alberta.
Habitat: Forest openings in canyons and on ridges, mid-elevations in the mountains.
Origin: Native
Flowers: May-July
Ribes wolfiiWinaha currant, Wolf's currant
Distribution: Occurring east of the Cascades crest in the southeastern counties in Washington; southeastern Washington to adjacent Oregon and Idaho, south and east to the southern Rocky Mountains.
Habitat: Moist forests and meadows, montane to subalpine.
Origin: Native
Flowers: May-July
Rigiopappus leptocladusbristlehead, false wireweed
Distribution: Occurring east of the Cascades crest in south-central Washington; Washington to California, east to Idaho and Nevada.
Habitat: Dry, open areas at low elevations; sagebrush and grasslands area
Origin: Native
Flowers: April-June
Robinia hispidabristly locust
Distribution: Occurring in scattered locations on both sides of the Cascades crest; introduced from British Columbia to California, native from the Great Plains to eastern North America.
Habitat: Forest edge, roadsides, wastelots, and other disturbed areas.
Origin: Introduced from central and eastern North America
Flowers: May-July
Robinia pseudoacaciablack locust
Distribution: Occurring on both sides of the Cascades crest in Washington; introduced from Alaska to California, east to the Rocky Mountains, native from the Great Plains to eastern North America.
Habitat: Stream and river banks, forest edge, wastelots, abandoned homesteads, and disturbed areas.
Origin: Introduced from central and eastern North America
Flowers: May-June
Romanzoffia sitchensisSitka mistmaiden
Distribution: Occurring on oth sides of the Cascades in Washington; Alaska to northern California, east to Idaho and Montana.
Habitat: Wet cliffs and ledges, usually at middle to high elevations in the mountains, but descending to near sea level in the Columbia River Gorge.
Origin: Native
Flowers: June-August
Romanzoffia tracyiTracy's mistmaiden
Distribution: Along the coast in southwestern Washington; south to northern California.
Habitat: Coastal bluffs and rocks.
Origin: Native
Flowers: March-April
Rorippa austriacaAustrian yellowcress field-cress
Distribution: Occurring in scattered locations chiefly east of the Cascades in Washington; Alberta south to California, east to coastal U.S.
Habitat: Disturbed areas and waste ground.
Origin: Introduced from Europe
Flowers: June-August
Rorippa columbiaeColumbia yellowcress cress
Distribution: In the south-central counties of Washington; Washington south to California.
Habitat: Moist, sandy soil.
Origin: Native
Flowers: May-August
Rorippa curvipesblunt-leaved yellowcress, truncate yellowcress
Distribution: Occurring chiefly east of the Cascades in Washington; widely distributed throughout western and central North America.
Habitat: Wet areas including streambanks, lake shores, wet meadows, and ditches.
Origin: Native
Flowers: May-September
Rorippa curvisiliquawestern yellowcress
Distribution: British Columbia to California, east to Montana and Nevada
Habitat: Stream banks and moist soil, low to mid-elevations in the mountains
Origin: Native
Flowers: May - September
Rorippa palustrishispid yellowcress, marsh yellowcress
Distribution: Widely distributed throughout Washington; common throughout North America.
Habitat: Wet ground and low elevations.
Origin: Native
Flowers: June-October
Rorippa sinuataspreading yellowcress
Distribution: Occurring in Klickitat County in Washington; British Columbia south to California, east to central North America.
Habitat: Wet areas including pond and lake margins, stream banks, and ditches.
Origin: Native
Flowers: May-September
Rorippa sphaerocarparoundfruit yellowcress
Origin: Native
Rorippa sylvestriscreeping yellowcress
Distribution: Known only from Whitman County in Washington; British Columbia south to Oregon, east across North America to the Atlantic Coast.
Habitat: Disturbed, moist areas at low to middle elevations.
Origin: Introduced from Europe
Flowers: May-August
Rorippa tenerrimaModoc yellowcress
Origin: Native
Rosa caninadog rose
Distribution: Introduced at low elevations west of the Cascades, and in Idaho
Habitat: Roadside thickets.
Origin: Introduced
Flowers: May - June
Rosa gymnocarpa
Distribution: Occurring on both sides of the Cascades crest in Washington, though more common west of the crest; British Columbia to California, east to Montana.
Habitat: Dry to moist woods, forest edge, and thickets, from sea level to middle elevations in the mountains.
Origin: Native
Flowers: May-July
Rosa multifloramultiflora rose, rambler rose
Distribution: Occurring on both sides of the Cascades crest in Washinton; British Columbia to California; east to the southern Rocky Mountains, Great Plains, and eastern North America where widespread.
Habitat: Roadsides, fields, highway and utility right of ways, forest edge, and other often moist, disturbed areas where escaping from cultivation.
Origin: Introduced from Asia
Flowers: April-June
Rosa nutkanaNootka rose
Distribution: Widely distributed throughout Washington on both sides of the Cascades crest; Alaska to California, east to the Rocky Mountains.
Habitat: Thickets, shores, forest edges, riparian zones, rocky slopes from low elevations to the montane.
Origin: Native
Flowers: May-July
ssp. macdougalii – bristly Nootka rose
ssp. nutkana – Nootka rose
Rosa pisocarpaclustered rose, peafruit rose
Distribution: Occurring west of the Cascades crest in Washington; southern British Columbia to California.
Habitat: Thickets, stream banks, and swampy places at lower elevations.
Origin: Native
Flowers: May-July
Rosa rubiginosasweetbrier rose, small-flowered sweetbrier
Distribution: Introduced chiefly west of the Cascades, and in eastern United states.
Habitat: Roadsides and pastures, occasionally in more natural areas.
Origin: Introduced
Flowers: June - July
Rosa rugosarugosa rose
Distribution: Occurring west of the Cascades crest in coastal marine habitats; Alaska to Oregon; also in the north-central and northeastern areas of North America.
Habitat: Edge of saltwater beaches, roadsides, forest edge, fields, and other disturbed areas.
Origin: Introduced from Asia
Flowers: June-August
Rosa woodsiipearhip rose
Distribution: Occurring east of the Cascades crest in Washington; Alaska south to California, east to the central U.S. and eastern Canada.
Habitat: Valleys and hillsides at low elevations to forest openings at mid-elevations in the mountains.
Origin: Native
Flowers: May-July
Rotala ramosiorlowland toothcup
Origin: Native
Flowers: June - August
Rubus allegheniensisAllegheny blackberry, common blackberry
Origin: Introduced
Rubus anglocandicans
Origin: Introduced
Rubus arcticusnagoonberry
Distribution: Alaska to Newfoundland, south to Vancouver Island and southern British Columbia, and in the Rocky Mountains to Colorado.
Habitat: Tundra to high mountain meadows, bogs and woods.
Origin: Native
Flowers: June - July
Rubus armeniacusHimalayan blackberry
Origin: Introduced
Rubus bifronsHimalayan blackberry
Distribution: Occurrng on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, southern Great Plains, and eastern North America.
Habitat: Disturbed areas, riparian zones, and forest edges at low elevations.
Origin: Introduced from Eurasia
Flowers: May-August
Rubus chamaemoruscloudberry
Origin: Native
Rubus hispidusbristly dewberry, swamp dewberry
Origin: Introduced
Rubus idaeusred raspberry
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east across most of North America to the Atlantic Coast.
Habitat: Wet or dry woodland to open and often rocky mountain slopes.
Origin: Native
Flowers: May-July
ssp. strigosus – grayleaf red raspberry
Rubus laciniatuscut-leaf blackberry, evergreen blackberry
Distribution: Introduced chiefly west of the Cascades, British Columbia to California; occasionally east to Idaho
Habitat: Roadsides and disturbed areas, mostly at low elevations
Origin: Introduced
Flowers: June - Early August
Rubus lasiococcusroughfruit berry, dwarf bramble, hairy-fruit smooth dewberry
Distribution: Occurring on both sides of the Cascades crest and in the Olympic Mountains in Washington; British Columbia south to California.
Habitat: Moist to dry woods, lowlands to subalpine.
Origin: Native
Flowers: June-August
Rubus leucodermisblackcap raspberry, dark raspberry, whitebark raspberry
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to southern California, east to the Rocky Mountains.
Habitat: Thickets, forest edge and openings, fields, and hillsides from low to middle elevations.
Origin: Native
Flowers: April-July
Rubus nigerrimusdark raspberry, northwest raspberry
Distribution: Along the Snake River in Whitman County, Washington.
Habitat: Moist hillsides, usually along streams.
Origin: Native
Flowers: May - June
Rubus nivalissnow dwarf bramble, snow dewberry
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to southwest Oregon, also in west-central Idaho.
Habitat: Open to deeply shaded, usually moist areas in the mountains at middle elevations.
Origin: Native
Flowers: June-July
Rubus odoratuspurple flowering raspberry
Origin: Introduced
Rubus parviflorusthimbleberry
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to Alberta, the Rocky Mountains, and Great Lakes region.
Habitat: Forest openings and edge, thickets, meadows, and riparian corridors from sea level to the subalpine.
Origin: Native
Flowers: April-July
Rubus pedatusstrawberry bramble, strawberry-leaf raspberry
Distribution: Alaska to southern Oregon, east to Idaho and Montana
Habitat: Moist areas, open banks to dense forests, near sea level to timberline
Origin: Native
Flowers: May - Early July
Rubus pensilvanicusPennsylvania blackberry
Origin: Introduced
Rubus pubescensdwarf red blackberry, dwarf red blackberry raspberry, raspberry raspberry, red raspberry
Distribution: Occurring in the northeast counties in Washington; widespread throughout the northern half of North America.
Habitat: Stream banks and moist woods to clearings where moderately dry, mid-elevations in the mountains.
Origin: Native
Flowers: May-July
Rubus spectabilissalmonberry
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, disjunct in northern Idaho.
Habitat: Lowland moist woods and swamps to mid-elevations in the mountains.
Origin: Native
Flowers: March-June
Rubus ulmifoliuselm-leaf blackberry, Himalayan blackberry
Origin: Introduced
Rubus ursinusPacific blackberry, trailing blackberry, dewberry, Douglasberry
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east to Montana.
Habitat: Open to fairly dense woodlands, thickets, and balds, sea level to middle elevations in the mountains; common in logged areas.
Origin: Native
Flowers: April-August
Rubus vestitusEuropean blackberry
Distribution: Introduced at scattered locations in the Pacific Northwest.
Habitat: Roadsides and waste ground.
Origin: Introduced
Flowers: April - June
Rudbeckia alpicolashowy black-eyed Susan, Washington showy black-eyed Susan, Wenatchee Mountain showy black-eyed Susan
Distribution: Occurring east of the Cascades crest in Washington, where endemic to the Wenatchee Mountains.
Habitat: Thickets, bogs, and along streams in the mountains.
Origin: Native
Flowers: June-August
Rudbeckia hirtablack-eyed Susan
Distribution: Occurring in scattered locations on both sides of the Cascades crest; British Columbia to California, east across much of the North America to the Atlantic Coast.
Habitat: Open meadows and disturbed places.
Origin: Introduced from further east in North America
Flowers: June-August
var. pulcherrima – black-eyed Susan
Rudbeckia laciniatagreen-headed black-eyed Susan, tall black-eyed Susan
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to Washington, otherwise Rocky Mountains east to the Atlantic Coast.
Habitat: Streambanks and other moist, disturbed places.
Origin: Introduced from further east in North America
Flowers: July-September
var. ampla – tall black-eyed Susan
Rudbeckia occidentaliswestern black-eyed Susan, western chocolate black-eyed Susan
Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington to California, east to the Rocky Mountains.
Habitat: Moist meadows and forest openings at moderate elevations in the mountains.
Origin: Native
Flowers: June-August
Rumex acetosa
Distribution: Introduced in scattered locations in North America; occasional in British Columbia, western Washington and Oregon, and northcentral Montana.
Habitat: Disturbed soil and wasteland.
Origin: Introduced
Flowers: April - July
Rumex acetosellacommon sheep sorrel
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Balds, prairies, meadows, pastures, fields, roadsides, wastelots, lawns and other disturbed open areas from the lowlands to middle elevations in the mountains.
Origin: Introduced from Eurasia
Flowers: May-August
Rumex conglomeratusclustered dock, sharp dock
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California, also along southern U.S. border to central and eastern U.S.
Habitat: A weed of waste ground.
Origin: Introduced
Flowers: June-September
Rumex crispuscurly dock, sour dock
Distribution: Introduced and common in most of North America from the coast to inland mountains.
Habitat: Moist meadows.
Origin: Introduced
Flowers: June - September
Rumex dentatustoothed dock
Origin: Introduced
Rumex maritimusgolden dock
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to eastern North America except for southeastern U.S.
Habitat: Mostly in wet places.
Origin: Native
Flowers: June-September
ssp. fueginus – American golden dock, Tierra del Fuego dock
Rumex obtusifoliusbitter dock
Distribution: Occurring on both sides of the Cascades in Washington; widely distributed throughout much of North America.
Habitat: Moist roadsides and wasteland.
Origin: Introduced
Flowers: March-September
Rumex occidentaliswestern dock, western dock o n
Distribution: Distributed on both sides of the Cascades in Washington; Alaska south to central California, east to North Dakota and New Mexico.
Habitat: Moist to swampy areas and wet meadows, from the sea coast to foothill valleys.
Origin: Native
Flowers: June-August
Rumex patientiapatience dock
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon, east to the Atlantic Coast.
Habitat: Roadsides and other disturbed, open ground
Origin: Introduced from Eurasia
Flowers: May-August
Rumex paucifoliusalpine sheep sorrel, alpine sorrel, mountain sorrel
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to the Rocky Mountains.
Habitat: moist grasslands, stream banks, and montane to alpine meadows.
Origin: Native
Flowers: June -August
Rumex persicarioidesseashore dock, yellow dock
Distribution: Occurring along the coast in Washington; British Columbia to California, also in eastern North America.
Habitat: Beaches, shores, and slightly saline marshes.
Origin: Native
Flowers: June-August
Rumex salicifoliuswillow dock
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast
Habitat: Streambanks, moist meadows, beaches, alkaline shores, roadsides, and other open places from low to moderate elevations.
Origin: Native
Flowers: May-July
var. angustivalvis – western willow dock
var. transitorius – narrow-leaved dock, Pacific willow dock
var. triangulivalvis – or triangular-valved dock, white, white willow
var. utahensis – Utah willow dock
Rumex sanguineusred-vein dock
Distribution: Occurring chiefly west of the Cascades crest in Washington; southwestern British Columbia to Oregon, also in eastern North America.
Origin: Introduced from Eurasia
Flowers: June-September
Rumex stenophyllusnarrow-leaved dock, narrowleaf dock
Origin: Introduced from Europe
Rumex venosusveiny dock, winged dock
Distribution: Occurring east of the Cascades crest in Washington; Alberta to California, east to the Rocky Mountains and Great Plains.
Habitat: Sand dunes and sandy river banks to dry, gravelly soil, sagebrush deserts and grasslands at low elevations.
Origin: Native
Flowers: April-June
Rupertia physodesforest scurfpea, California tea
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California, disjunct in northeastern Oregon and adjacent Idaho.
Habitat: Prairie and forest edges at low elevations.
Origin: Native
Flowers: May-June
Ruppia maritimabeaked ditch-grass, spiral ditch-grass, western ditch-grass
Distribution: Along the Pacific Coast from Alaska to California, inland throughout Canada and the United States to the Atlantic Coast.
Habitat: Coastal in saline or brackish water, inland in ponds, ditches, and lakes.
Origin: Native
Flowers: July - August