Vascular Plants

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

Browse by common name:
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Common names beginning with R:
Common rabbit-brush (Ericameria nauseosa)
Distribution: Chiefly east of the Cascades in Washington; British Columbia to Oregon, east to Montana.
Habitat: Dry, open areas from the plains to moderate elevations in the mountains.
Origin: Native
Flowers: August-September
Green rabbit-brush (Chrysothamnus viscidiflorus)
Distribution: Occurring east of the Cascades in Washington; Washington south to California, east to Montana and New Mexico.
Habitat: Shrub-steppe, dry foothills.
Origin: Native
Flowers: July-September
Macoun's rabbit-tobacco (Pseudognaphalium macounii)
Origin: Native
Northwestern rabbit-tobacco (Pseudognaphalium thermale)
Distribution: Occurring on both sides of the Cascades crest in Washingotn; British Columbia south to California, east to Montana and Utah.
Habitat: Dry, sandy banks and ditches, open woods of ponderosa pine and Douglas fir, and mixed deciduous forests.
Origin: Native
Flowers: June-September
Red-tip rabbit-tobacco (Pseudognaphalium luteoalbum)
Distribution: Locally introduced, chiefly west of the Cascades.
Habitat: Disturbed waste ground.
Origin: Introduced
Flowers: June - October
Truckee green rabbitbrush (Chrysothamnus humilis)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Idaho and Nevada.
Habitat: Shrub-steppe, grasslands, and sites with alkaline soils.
Origin: Native
Flowers: July-September
Truckee rabbitbrush (Chrysothamnus humilis)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Idaho and Nevada.
Habitat: Shrub-steppe, grasslands, and sites with alkaline soils.
Origin: Native
Flowers: July-September
Common rabbitleaf (Lagophylla ramosissima)
Distribution: Occurring east of the Cascades in Washington; Washington south to California, east to Montana, Idaho, and Nevada.
Habitat: Dry, open areas of foothills and plains.
Origin: Native
Flowers: May-July
Garden radish (Raphanus sativus)
Distribution: Occurring in scattered locations throughout Washington; widely distributed throughout North America.
Habitat: Waste places.
Origin: Introduced, probably from Mediterranean Europe
Flowers: May-July
Radish (Raphanus sativus)
Distribution: Occurring in scattered locations throughout Washington; widely distributed throughout North America.
Habitat: Waste places.
Origin: Introduced, probably from Mediterranean Europe
Flowers: May-July
Wild radish (Raphanus raphanistrum)
Distribution: Occurring in scattered locations chiefly west of the Cascades; widely distributed throughout North America.
Habitat: Weed of waste ground.
Origin: Introduced, probably from the Mediterranean region
Flowers: May-July
Ragged-robin (Silene flos-cuculi)
Origin: Introduced
Annual ragweed (Ambrosia artemisiifolia)
Distribution: Occurring on both sides of the Cascades in Washington; widespread throughout North America; also introduced in Europe.
Habitat: Dry, disturbed, open areas at low elevations, including roadsides, pastures, and wastelots.
Origin: Introduced
Flowers: August-October
Bur ragweed (Ambrosia acanthicarpa)
Distribution: Chiefly east of the Cascades, but widespread in western United States, to Texas and the Dakotas
Habitat: Weedy native in dry areas at low elevations
Origin: Native
Flowers: July - October
Common ragweed (Ambrosia artemisiifolia)
Distribution: Occurring on both sides of the Cascades in Washington; widespread throughout North America; also introduced in Europe.
Habitat: Dry, disturbed, open areas at low elevations, including roadsides, pastures, and wastelots.
Origin: Introduced
Flowers: August-October
Giant ragweed (Ambrosia trifida)
Distribution: Native and widespread in central and eastern United States; an occasional introduction in the Pacific Northwest.
Habitat: Waste places, usually in moist soil.
Origin: Introduced
Flowers: July - October
Perennial ragweed (Ambrosia psilostachya)
Distribution: Occurring in the eastern portion of Washington; widely distributed throughout North America except for Alaska and far northern Canada.
Habitat: Waste ground.
Origin: Native
Flowers: July-October
Western ragweed (Ambrosia psilostachya)
Distribution: Occurring in the eastern portion of Washington; widely distributed throughout North America except for Alaska and far northern Canada.
Habitat: Waste ground.
Origin: Native
Flowers: July-October
Alkali marsh ragwort (Senecio hydrophilus)
Distribution: East of the Cascades, British Columbia to California, east to South Dakota and Colorado.
Habitat: Swampy places in the valleys and foothills; tolerant of alkali.
Origin: Native
Flowers: June- September
Arrowleaf ragwort (Senecio triangularis)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains.
Habitat: Moist places and streambanks, moderate to high elevations in the mountains, and low elvations west of the Cascades.
Origin: Native
Flowers: June-September
Elmer's ragwort (Senecio elmeri)
Distribution: Occurring in the Cascade and Wenatchee Mountains of central and northern Washington; British Columbia south to Washington.
Habitat: Talus slopes and other rocky places in alpine areas.
Origin: Native
Flowers: July-September
Olympic Mountain ragwort (Senecio neowebsteri)
Distribution: Olympic Mountains of Washington at high elevations.
Habitat: Talus slopes and rocky places.
Origin: Native
Flowers: Aug.-Sept.
Silver ragwort (Jacobaea maritima)
Origin: Introduced
Siskiyou Mountain ragwort (Packera macounii)
Distribution: West of the Cascades, British Columbia to southern Oregon, mostly in the Puget Trough.
Habitat: Open woods and dry, open places.
Origin: Native
Flowers: May - July
Sticky ragwort (Senecio viscosus)
Origin: Introduced
Tansy ragwort (Jacobaea vulgaris)
Distribution: Widely distributed on both sides of the Cascades in Washington; British Columbia south to California, east to Idaho and Montana; eastern North America.
Habitat: A weed of pastures, roadsides, forest edges, and other disturbed areas.
Origin: Introduced
Flowers: June-September
Woodland ragwort (Senecio sylvaticus)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, also in eastern North America.
Habitat: Disturbed ground at low elevations.
Origin: Introduced from Europe
Flowers: May-September
Rainiera (Rainiera stricta)
Distribution: Occurring on both sides of the Cascades crest in south-central Washington; Washington south to Oregon.
Habitat: Meadows and moist, open hillsides at mid- to high elevations in the mountains.
Origin: Native
Flowers: July-August
Rape (Brassica napus)
Distribution: Known from only a few scattered locations in Washington; widely distributed throughout much of North America.
Habitat: Disturbed areas including fields, roadsides, and wastelots, where often escaped from cultivation.
Origin: Introduced from Eurasia
Flowers: April-June
Winter rape (Brassica napus)
Distribution: Known from only a few scattered locations in Washington; widely distributed throughout much of North America.
Habitat: Disturbed areas including fields, roadsides, and wastelots, where often escaped from cultivation.
Origin: Introduced from Eurasia
Flowers: April-June
Rapeseed (Brassica napus)
Distribution: Known from only a few scattered locations in Washington; widely distributed throughout much of North America.
Habitat: Disturbed areas including fields, roadsides, and wastelots, where often escaped from cultivation.
Origin: Introduced from Eurasia
Flowers: April-June
Blackcap raspberry (Rubus leucodermis)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to southern California, east to the Rocky Mountains.
Habitat: Fields and open to wooded hillsides, from low to moderate elevations.
Origin: Native
Flowers: April-July
Dark raspberry (Rubus leucodermis)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to southern California, east to the Rocky Mountains.
Habitat: Fields and open to wooded hillsides, from low to moderate elevations.
Origin: Native
Flowers: April-July
Dark raspberry (Rubus nigerrimus)
Distribution: Along the Snake River in Whitman County, Washington.
Habitat: Moist hillsides, usually along streams.
Origin: Native
Flowers: May - June
Dwarf red blackberry raspberry (Rubus pubescens)
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
Northwest raspberry (Rubus nigerrimus)
Distribution: Along the Snake River in Whitman County, Washington.
Habitat: Moist hillsides, usually along streams.
Origin: Native
Flowers: May - June
Purple flowering raspberry (Rubus odoratus)
Origin: Introduced
Raspberry raspberry (Rubus pubescens)
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
Red raspberry (Rubus idaeus)
Distribution: Alaska east to Newfoundland, south to California and North Carolina.
Habitat: Stream banks and open, moist or dry woods to rocky slopes in the mountains, often on talus.
Origin: Native
Flowers: May - July
Red raspberry (Rubus pubescens)
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
Strawberry-leaf raspberry (Rubus pedatus)
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
Whitebark raspberry (Rubus leucodermis)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to southern California, east to the Rocky Mountains.
Habitat: Fields and open to wooded hillsides, from low to moderate elevations.
Origin: Native
Flowers: April-July
Giant rattlesnake-plantain (Goodyera oblongifolia)
Distribution: Widely distributed throughout the mountainous and forested areas of Washington; Alaska south to California, east to the Rocky Mountains; Great Lakes Region and eastern Canada/New England.
Habitat: Dry to moist forests, sea level to mid-elevations in the mountains.
Origin: Native
Flowers: July-August
Western rattlesnake-plantain (Goodyera oblongifolia)
Distribution: Widely distributed throughout the mountainous and forested areas of Washington; Alaska south to California, east to the Rocky Mountains; Great Lakes Region and eastern Canada/New England.
Habitat: Dry to moist forests, sea level to mid-elevations in the mountains.
Origin: Native
Flowers: July-August
Ravennagrass (Tripidium ravennae)
Origin: Introduced
Rocky Mountain redcedar (Juniperus scopulorum)
Distribution: Puget Trough and southwest British Columbia, south, east Cascades, to Oregon, east to Nebraska
Habitat: Coastal islands to inland valleys and lower mountains
Origin: Native
Cones: May - June
Fringed redmaids (Calandrinia ciliata)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California, east to Arizona and New Mexico.
Habitat: Gravelly to heavy soil, usually where vernally moist, at low elevations.
Origin: Native
Flowers: April-May
Redmainds (Calandrinia ciliata)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California, east to Arizona and New Mexico.
Habitat: Gravelly to heavy soil, usually where vernally moist, at low elevations.
Origin: Native
Flowers: April-May
Redshank (Persicaria maculosa)
Distribution: Occurring throughout much of Washington; widely distributed throughout North America.
Habitat: A weedy species, usually on moist, cultivated or otherwise disturbed soil.
Origin: Introduced
Flowers: March-September
Grand redstem (Ammannia robusta)
Distribution: Occurring east of the Cascades crest in Washington; widely distributed from the tropics to much of North America.
Habitat: Wet places, often where alkaline.
Origin: Native
Flowers: May-june
Valley redstem (Ammannia coccinea)
Distribution: Known only from a restoration site in King County; California east along Mexican border to central and eastern U.S.
Habitat: Restored wetland.
Origin: Introduced
Flowers: June-August
Chinese redtip (Photinia davidiana)
Origin: Introduced from China
Oriental redtip (Photinia villosa)
Origin: Introduced from China
Redwood-sorrel (Oxalis oregana)
Distribution: Olympic Mountains and west slope of the Cascades in Washington; British Columbia south to California.
Habitat: Moist woods, low to moderate elevations.
Origin: Native
Flowers: April-September
Common reed (Phragmites australis)
Distribution: In scattered locations throughout many areas of Washington; widely distributed throughout North America; circumboreal.
Habitat: Disturbed areas, including roadsides, often where wet or seasonally moist.
Origin: Native
Flowers: July-September
Bluejoint reedgrass (Calamagrostis canadensis)
Distribution: Alaska to Quebec, south through the United States except for the Deep South
Habitat: Wet places, sea level to mid-elevations in the mountains
Origin: Native
Flowers: Late June - August
Purple reedgrass (Calamagrostis purpurascens)
Origin: Native
Flowers: Late June - August
Rainier reedgrass (Calamagrostis tacomensis)
Origin: Native
Flowers: Late July - September
Slimstem reedgrass (Calamagrostis stricta)
Origin: Native
Hillside rein orchid (Platanthera elegans)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho and Montana.
Habitat: Mostly in dry, open woods and hills where moist in spring.
Origin: Native
Flowers: June-September
Blunt-leaf rein-orchid (Platanthera obtusata)
Distribution: Scattered locations on both sides of the Cascades in Washington; Alaska to Oregon, east to Montana and Colorado, across Canada to Newfoundland.
Habitat: Damp to wet forests at mid-elevations in the mountains.
Origin: Native
Flowers: June-July
Elegant rein-orchid (Platanthera elegans)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho and Montana.
Habitat: Mostly in dry, open woods and hills where moist in spring.
Origin: Native
Flowers: June-September
One-leaf rein-orchid (Platanthera obtusata)
Distribution: Scattered locations on both sides of the Cascades in Washington; Alaska to Oregon, east to Montana and Colorado, across Canada to Newfoundland.
Habitat: Damp to wet forests at mid-elevations in the mountains.
Origin: Native
Flowers: June-July
Resinweed (Grindelia hirsutula)
Distribution: From the coast to mid elevations; both sides of the Cascades in Washington. British Columbia south to California, east to New York and Quebec.
Habitat: Coastal bluffs, forest openings, alluvial areas, disturbed sites.
Origin: Native
Flowers: May-October
Serrate resinweed (Grindelia squarrosa)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east across southern Canada and most of the United States to the Atlantic Coast.
Habitat: Dry, open, often sandy places, at low elevations.
Origin: Introduced
Flowers: June-September
Restharrow (Ononis spinosa)
Origin: Introduced
California rhododendron (Rhododendron macrophyllum)
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
Pacific rhododendron (Rhododendron macrophyllum)
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
White rhododendron (Rhododendron albiflorum)
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
Rhubarb (Rheum rhabarbarum)
Origin: Introduced
Indian rice (Fritillaria camschatcensis)
Distribution: Chiefly northern Puget Sound lowlands in Washington; Kodiak Island and coastal Alaska south to Washington.
Habitat: Moist areas from near tide flats to mountain meadows.
Origin: Native
Flowers: May-July
Knotted rish (Juncus nodosus)
Distribution: East of the Cascades, British Columbia to California, east to Nova Scotia and Maine.
Habitat: Ditches, ponds and wet places.
Origin: Native
Flowers: Late June - August
Ragged robin (Clarkia pulchella)
Distribution: Chiefly east of the Cascades in Washington; British Columbia to Oregon, east to South Dakota.
Habitat: Dry, open slopes, low to mid-elevations.
Origin: Native
Flowers: May-June
Slender-stem rock-jasmine (Androsace filiformis)
Origin: Native
Flowers: June - July
American parsley fern rockbrake (Cryptogramma acrostichoides)
Distribution: Alaska to California, east in cool, moist areas to Ontario and Michigan
Habitat: Cliff crevices and talus slopes at mid- to high elevations in the mountains
Origin: Native
Cascade parsley fern rockbrake (Cryptogramma cascadensis)
Distribution: British Columbia to California, east to Idaho and Montana
Habitat: Cliff crevices and talus slopes at mid- to high elevations in the mountains, occasionally descending to sea level in humid areas
Origin: Native
Fragile rockbrake (Cryptogramma stelleri)
Origin: Native
Rockbrake (Cryptogramma acrostichoides)
Distribution: Alaska to California, east in cool, moist areas to Ontario and Michigan
Habitat: Cliff crevices and talus slopes at mid- to high elevations in the mountains
Origin: Native
Rockbrake (Cryptogramma cascadensis)
Distribution: British Columbia to California, east to Idaho and Montana
Habitat: Cliff crevices and talus slopes at mid- to high elevations in the mountains, occasionally descending to sea level in humid areas
Origin: Native
Slender rockbrake (Cryptogramma stelleri)
Origin: Native
Steller's rockbrake (Cryptogramma stelleri)
Origin: Native
Black-flowered rockcress (Boechera atrorubens)
Distribution: East of the Cascades crest in Washington; Washington south to Oregon.
Habitat: Sagebrush and ponderosa pine country.
Origin: Native
Flowers: April-June
Blue Mountain rockcress (Boechera puberula)
Origin: Native
Calder's rockcress (Boechera calderi)
Origin: Native
Canadian rockcress (Boechera stricta)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains, and east along the northern U.S. and southern Canada to the Atlantic Coast.
Habitat: Open areas in the forest at mid-elevations to sub-alpine meadows.
Origin: Native
Flowers: May-July
Cascade rockcress (Arabis furcata)
Distribution: Occurring on both sides of the Cascades crest in Washington; Washington south to Oregon.
Habitat: Open slopes, meadows, and ridgelines in alpine and subalpine areas.
Origin: Native
Flowers: May-July
Cascades rockcress (Boechera cascadensis)
Origin: Native
Columbia Gorge rockcress (Arabis furcata)
Distribution: Occurring on both sides of the Cascades crest in Washington; Washington south to Oregon.
Habitat: Open slopes, meadows, and ridgelines in alpine and subalpine areas.
Origin: Native
Flowers: May-July
Columbia rockcress (Boechera pauciflora)
Distribution: East of the Cascades crest in Washington; British Columbia south to California, east to Montana and Utah.
Habitat: Sagebrush and ponderosa pine country.
Origin: Native
Flowers: April-June
Crosshaired rockcress (Arabis crucisetosa)
Distribution: Occurring in the southeastern corner of Washington; Snake River canyon, Asotin County, Washington, east to west-central Idaho.
Habitat: Wet banks to moist soil or coniferous woods.
Origin: Native
Flowers: April-June
Cusick's rockcress (Boechera cusickii)
Distribution: East of the Cascades in Washington; east-central Washington south to Nevada, east to central Idaho.
Habitat: Sagebrush flats to open Ponderosa pine forests, often on lithosol.
Origin: Native
Flowers: March-May
Danglepod rockcress (Boechera pendulocarpa)
Distribution: Chiefly east of the Cascades crest in Washington; Yukon Territory south to California, east to Montana, Wyoming, and Utah.
Habitat: From sagebrush and ponderosa pine slopes to well up in the mountains.
Origin: Native
Flowers: May-August
Drummond's rockcress (Boechera stricta)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains, and east along the northern U.S. and southern Canada to the Atlantic Coast.
Habitat: Open areas in the forest at mid-elevations to sub-alpine meadows.
Origin: Native
Flowers: May-July
Elegant rockcress (Boechera sparsiflora)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to Idaho, Nevada, and Utah.
Habitat: From sagebrush plains to forest openings and meadows at moderate elevations.
Origin: Native
Flowers: May-July
Few-flowered rockcress (Boechera pauciflora)
Distribution: East of the Cascades crest in Washington; British Columbia south to California, east to Montana and Utah.
Habitat: Sagebrush and ponderosa pine country.
Origin: Native
Flowers: April-June
Fork-haired rockcress (Arabis furcata)
Distribution: Occurring on both sides of the Cascades crest in Washington; Washington south to Oregon.
Habitat: Open slopes, meadows, and ridgelines in alpine and subalpine areas.
Origin: Native
Flowers: May-July
Graham's rockcress (Boechera grahamii)
Origin: Native
Hairy rockcress (Arabis eschscholtziana)
Distribution: Occurring on both sides of the Cascades in Washington; Alaska south to California, east to the northern Rocky Mountains.
Habitat: Open areas, often in waste places, from sea level to mid-elevations in the mountains.
Origin: Native
Flowers: April-July
Hoary rockcress (Boechera puberula)
Origin: Native
Kamchatka rockcress (Arabidopsis kamchatica)
Origin: Native
Lemmon's rockcress (Boechera lemmonii)
Distribution: Occurring in the Olympic Mountains and East Cascades in Washington; Alaska south to California, east to the Rocky Mountains.
Habitat: Alpine meadows, ridges and talus slopes.
Origin: Native
Flowers: July-September
Littleleaf rockcress (Boechera microphylla)
Distribution: Occurring in Washington east of the Cacades crest; British Columbia south to eastern Oregon, east to Montana and Wyoming.
Habitat: Low montane to subalpine.
Origin: Native
Flowers: April-July
Lyall's rockcress (Boechera lyallii)
Distribution: Widely distributed in the mountains throughout Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Subalpine to alpine ridges, cliffs, and drier meadows.
Origin: Native
Flowers: June-August
Lyre-leaved rockcress (Arabidopsis kamchatica)
Origin: Native
Mt. Adams rockcress (Boechera paddoensis)
Distribution: Occurring east of the Cascades crest in the Mt. Adams area; Washington south to northeastern Oregon.
Habitat: Alpine slopes and talus.
Origin: Native
Flowers: July-August
Murry's rockcress (Boechera lyallii)
Distribution: Widely distributed in the mountains throughout Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Subalpine to alpine ridges, cliffs, and drier meadows.
Origin: Native
Flowers: June-August
Nuttall's rockcress (Arabis nuttallii)
Origin: Native
Flowers: April - August
Olympics rockcress (Arabis olympica)
Origin: Native
Pacific coast rockcress (Arabis eschscholtziana)
Distribution: Occurring on both sides of the Cascades in Washington; Alaska south to California, east to the northern Rocky Mountains.
Habitat: Open areas, often in waste places, from sea level to mid-elevations in the mountains.
Origin: Native
Flowers: April-July
Slender rockcress (Boechera sparsiflora)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to Idaho, Nevada, and Utah.
Habitat: From sagebrush plains to forest openings and meadows at moderate elevations.
Origin: Native
Flowers: May-July
Small-flowered rockcress (Boechera pauciflora)
Distribution: East of the Cascades crest in Washington; British Columbia south to California, east to Montana and Utah.
Habitat: Sagebrush and ponderosa pine country.
Origin: Native
Flowers: April-June
Small-leaved rockcress (Boechera microphylla)
Distribution: Occurring in Washington east of the Cacades crest; British Columbia south to eastern Oregon, east to Montana and Wyoming.
Habitat: Low montane to subalpine.
Origin: Native
Flowers: April-July
Spreadingpod rockcress (Boechera divaricarpa)
Distribution: Occurring on both sides of the Cascades crest in Washington, and in the Olympic Mountains; Alaska south to California, east to the Rocky Mountains.
Habitat: From middle elevations to subalpine areas in the mountains.
Origin: Native
Flowers: June-August
Western rockcress (Arabidopsis kamchatica)
Origin: Native
Woody rockcress (Boechera suffrutescens)
Origin: Native
American wintercress rocket (Barbarea orthoceras)
Distribution: Widely distributed throughout Washington; Alaska to the mountains of California, east though the Rockies to the New England states.
Habitat: Meadows, stream banks and moist woods, low to mid-elevations in the mountains.
Origin: Native
Flowers: March-July
Dame's rocket (Hesperis matronalis)
Distribution: Scattered locations on both sides of the Cascades in Washington; distributed throughout North America except for the southern portion of the U.S.
Habitat: Sometimes escaping and persisting on waste ground.
Origin: Introduced from Europe
Flowers: May-June
Dyer's rocket (Reseda luteola)
Distribution: Scattered locations in Washington; British Columbia south to California; scattered locations in central and eastern North America.
Habitat: Disturbed ground.
Origin: Introduced from Europe
Flowers: May-September
Early yellow rocket (Barbarea verna)
Origin: Introduced from Eurasia
Flowers: April - July
European sea rocket (Cakile maritima)
Distribution: Occurring along coastal counties in Washington; British Columbia south to California along the coast.
Habitat: At water's edge in sand or gravel.
Origin: Introduced from Europe
Flowers: May-September
False london rocket (Sisymbrium loeselii)
Distribution: Occurring east of the Cascades in Washington; British Columbia south to Nevada, east to the Atlantic Coast.
Habitat: Roadsides and drier disturbed areas.
Origin: Introduced from Eurasia
Flowers: June-August
Hairy rocket (Erucastrum gallicum)
Distribution: Weedy introduction from central Europe, fairly common in eastern United States; found in a few scattered locations in the Pacific Northwest.
Habitat: Waste areas and disturbed soil.
Origin: Introduced from Eurasia
Flowers: May - July
Prairie rocket (Erysimum inconspicuum)
Distribution: Known from the northeast region in Washington; Alaska south to Oregon and Nevada, east across much of the U.S. and Canada to the Atlantic Coast.
Habitat: Rock outcroppings and roadsides where calcareous, also tolerant of alkaline soils.
Origin: Native
Flowers: June-July
Sea rocket (Cakile maritima)
Distribution: Occurring along coastal counties in Washington; British Columbia south to California along the coast.
Habitat: At water's edge in sand or gravel.
Origin: Introduced from Europe
Flowers: May-September
Small-flowered rocket (Erysimum inconspicuum)
Distribution: Known from the northeast region in Washington; Alaska south to Oregon and Nevada, east across much of the U.S. and Canada to the Atlantic Coast.
Habitat: Rock outcroppings and roadsides where calcareous, also tolerant of alkaline soils.
Origin: Native
Flowers: June-July
Small-flowered rocket rocket (Erysimum inconspicuum)
Distribution: Known from the northeast region in Washington; Alaska south to Oregon and Nevada, east across much of the U.S. and Canada to the Atlantic Coast.
Habitat: Rock outcroppings and roadsides where calcareous, also tolerant of alkaline soils.
Origin: Native
Flowers: June-July
Tall rocket (Sisymbrium altissimum)
Distribution: Distributed throughout Washington but more common east of the Cascades; occurring throughout North America.
Habitat: Shrub-steppe, grasslands, and waste ground, especially following rangeland fires.
Origin: Introduced from Eurasia
Flowers: May-September
Yellow rocket (Barbarea orthoceras)
Distribution: Widely distributed throughout Washington; Alaska to the mountains of California, east though the Rockies to the New England states.
Habitat: Meadows, stream banks and moist woods, low to mid-elevations in the mountains.
Origin: Native
Flowers: March-July
Yellow rocket (Barbarea vulgaris)
Distribution: Chiefly west of the Cascades in Washington, with scattered locations east of the Cascades; distributed throughout much of the United States.
Habitat: Garden escape, found chiefly in wet places.
Origin: Introduced from Eurasia
Flowers: April-July
Chelan rockmat (Petrophytum cinerascens)
Distribution: Endemic to Columbia River region of central Washington.
Habitat: Basaltic cliffs.
Origin: Native
Flowers: June-August
Olympic Mountain rockmat (Petrophytum hendersonii)
Distribution: Endemic to (only occurring in) the Olympic Mountains of Washington.
Habitat: Rocky cliffs and talus slopes at mid- to high elevations.
Origin: Native
Flowers: July-September
Rocky Mountain rockmat (Petrophytum caespitosum)
Origin: Native
Cucumber root (Streptopus amplexifolius)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, also in northeastern North America.
Habitat: Open to dense moist forests from low elevations to subalpine.
Origin: Native
Flowers: May-July
Deer root (Iva axillaris)
Distribution: Chiefly east of the Castades, southern British Columbia to California, east to Manitoba and Oklahoma.
Habitat: Dry, often alkaline places, in the valleys, plains and foothills.
Origin: Native
Flowers: May - September
Western rattlesnake root (Nabalus alatus)
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska, south to Oregon, east to Alberta, Idaho, and Montana.
Habitat: Streambanks and other moist, shaded places.
Origin: Native
Flowers: July-September
Baldhip rose (Rosa gymnocarpa)
Distribution: Occurring west of and on the east slope of the Cascades in Washington; British Columbia to California, and in the mountains of Idaho and eastern Oregon.
Habitat: Moist or dry woods, sea level to mid-elevations in the mountains.
Origin: Native
Flowers: May-July
Clustered rose (Rosa pisocarpa)
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
Dog rose (Rosa canina)
Distribution: Introduced at low elevations west of the Cascades, and in Idaho
Habitat: Roadside thickets.
Origin: Introduced
Flowers: May - June
Field cotton rose (Filago arvensis)
Distribution: Occurring east of the Cascades crest in Washington; Alaska to Oregon, east to Sasketchewan, Nebraska, Minnesota and Michigan.
Habitat: Dry, open waste land and overgrazed ranges.
Origin: Introduced
Flowers: July-September
Peafruit rose (Rosa pisocarpa)
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
Pearhip rose (Rosa woodsii)
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
Rambler rose (Rosa multiflora)
Distribution: British Columbia to California; throughout central and eastern North America. Native to eastern Asia.
Habitat: Disturbed areas, roadside plantings, riparian zones.
Origin: Introduced from Europe
Flowers: April-June
Rugosa rose (Rosa rugosa)
Distribution: Known from a few scattered locations in lowland western Washington; Alaska and Washington in western North America; 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
Flowers: June-August
Sweetbrier rose (Rosa rubiginosa)
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
Wood rose (Rosa gymnocarpa)
Distribution: Occurring west of and on the east slope of the Cascades in Washington; British Columbia to California, and in the mountains of Idaho and eastern Oregon.
Habitat: Moist or dry woods, sea level to mid-elevations in the mountains.
Origin: Native
Flowers: May-July
Rose-of-sharon (Hypericum calycinum)
Distribution: West of the Cascades in Washington at low elevations.
Habitat: Escaped from cultivation in disturbed, urban settings.
Origin: Introduced from Turkey and Bulgaria
Flowers: May-July
Crimsoneyed rosemallow (Hibiscus moscheutos)
Distribution: Sporadic in central Washington; native to eastern North America
Habitat: Moist areas along edge of ponds and lakes.
Origin: Introduced
Flowers: July-August
Roseroot (Rhodiola integrifolia)
Distribution: In the Cascades and northeastern corner of Washington; Alaska to south to California, east to Colorado.
Habitat: Cliffs, talus and ridges, subalpine to alpine, generally where moist in early summer.
Origin: Native
Flowers: June-August
African rue (Peganum harmala)
Origin: Introduced
Flowers: June - August
Western meadow rue (Thalictrum occidentale)
Distribution: Occurring on both sides of the Cascades in Washingtton; British Columbia south 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
Hairy rupturewort (Herniaria hirsuta)
Distribution: Recently collected in Spokane County; Washington and California, also in Maryland and Massachusetts
Habitat: Disturbed sandy flats, roadsides, and woodlands at low elevation
Origin: Introduced
Flowers: May-July
Alpine rush (Juncus alpinoarticulatus)
Distribution: In scattered location on both sides of the Cascades crest in Washington; scattered throughout North America from Alaska to Washington, east across Canada and central U.S. to northeastern North America.
Habitat: Wet meadows, pond and lake shores.
Origin: Native
Flowers: July-September
Baltic rush (Juncus balticus)
Distribution: Widely distributed throughout much of Washington; widely distributed throughout much of western and central North America, less widely distributed in eastern North America.
Habitat: Wet places, often where saline or alkaline.
Origin: Native
Flowers: June-August
Black rush (Juncus gerardi)
Distribution: Occurring west of the Cascades crest in counties along the Puget Sound and outer coast; British Columbia south to Oregon, east sporadically across the U.S. to the northern Atlantic coast of the U.S. and Canada; circumboreal.
Habitat: Coastal salt marshes.
Origin: Both native and introduced - occurring in eastern North America, Eurasia.
Flowers: June-September
Blue rush (Juncus inflexus)
Origin: Introduced
Bog rush (Juncus hesperius)
Origin: Native
Bolander's rush (Juncus bolanderi)
Distribution: West of the Cascades, southern British Columbia south to coastal California.
Habitat: Marshes and river bottoms from tidelands to the lower mountains.
Origin: Native
Flowers: Late May - August
Brewer's rush (Juncus breweri)
Origin: Native
Brown-fruited rush (Juncus pelocarpus)
Origin: Introduced from northeastern North America
Bulbous rush (Juncus bulbosus)
Distribution: Introduced at several locations in wsestern Washington; British Columbia south to Oregon, east across northern Canada to the Atlantic Coast; Europe.
Habitat: Sandy or peaty shores of streams and pools.
Origin: Introduced from Eurasia
Flowers: August
Canadian rush (Juncus canadensis)
Distribution: Introduced from eastern United States to a few locations in western Washington.
Habitat: Brackish swamps, acid bogs, tidal flats and beaches.
Origin: Introduced from eastern North America
Flowers: June - July
Coastal rush (Juncus hesperius)
Origin: Native
Colorado rush (Juncus confusus)
Origin: Native
Flowers: June - August
Common rush (Juncus pylaei)
Origin: Introduced
Compact rush (Juncus conglomeratus)
Origin: Introduced from Europe
Coville's rush (Juncus covillei)
Origin: Native
Dagger rush (Juncus ensifolius)
Distribution: Widely distributed throughout the mountainous areas of Washington; Alaska south to California, east to the Great Plains; introduced in eastern North America.
Habitat: Shores of ponds and streams, wet meadows, fens, seeps, and ditches from low to high elevations in the mountains.
Origin: Native
Flowers: June-August
Daggerleaf rush (Juncus ensifolius)
Distribution: Widely distributed throughout the mountainous areas of Washington; Alaska south to California, east to the Great Plains; introduced in eastern North America.
Habitat: Shores of ponds and streams, wet meadows, fens, seeps, and ditches from low to high elevations in the mountains.
Origin: Native
Flowers: June-August
Diffuse rush (Juncus diffusissimus)
Origin: Introduced from South America
Drummond's rush (Juncus drummondii)
Distribution: Alaska south to California, east to the Rockies, Alberta to New Mexico.
Habitat: Alpine to subalpine meadows, streambanks, talus slopes and ridges.
Origin: Native
Flowers: July - September
Dudley's rush (Juncus dudleyi)
Origin: Native
Flowers: June - September
Dwarf scouring rush (Equisetum scirpoides)
Distribution: Circumboreal, south in North America to northeast Washington, east to northwest Montana, Minnisota, and New York.
Habitat: Moist, swampy places, especially in coniferous forests.
Origin: Native
Ferriss' scouring rush (Equisetum ×ferrissii)
Origin: Native
Flowering rush (Butomus umbellatus)
Distribution: Whatcom County in Washington. Introduced across the northern United States from Washington to Vermont.
Habitat: Occasional in ponds and wetlands.
Origin: Introduced from Eurasia
Flowers: August
Foothill rush (Juncus trilocularis)
Origin: Native
Giant path rush (Juncus anthelatus)
Origin: Introduced from eastern North America
Hair-leaved rush (Juncus supiniformis)
Distribution: Alaska south along the coast west of the Cascades to Mendocino County, California.
Habitat: Marshes, ponds, ditches and rivers, often where submerged early in the season.
Origin: Native
Flowers: July - September
Howell's rush (Juncus howellii)
Origin: Native
Flowers: July - August
Inch-high rush (Juncus uncialis)
Distribution: Oregon and California, occasional in estern Washington
Habitat: Margins of vernal pools and ponds.
Origin: Native
Flowers: May - June
Inland rush (Juncus interior)
Distribution: Alberta south to Colorado, east to Quebec and Tennesee; occasional in eastern Washington.
Habitat: Dry, upland sites in prairies, exposed sites in disturbed areas, ditches in sandy or clayey soil
Origin: Native
Flowers: May - June
Joint-leaved rush (Juncus articulatus)
Origin: Native
Jointed rush (Juncus articulatus)
Origin: Native
Kellogg's dwarf rush (Juncus kelloggii)
Origin: Native
Flowers: April - July
Knotty leaf rush (Juncus acuminatus)
Distribution: Mostly west of the Cascades, British Columbia south to California, east to southwest Idaho and Arizona.
Habitat: Ditches, lake margins, meadows and other wet places.
Origin: Native
Flowers: Late May - August
Long-styled rush (Juncus longistylis)
Origin: Native
Flowers: Late June - August
Mertens' rush (Juncus mertensianus)
Distribution: Alaska to California, east to Alberta, South Dakota and New Mexico
Habitat: Wet places along streams and lakes, mid- to high elevations in the mountains
Origin: Native
Flowers: July - September
Mud rush (Juncus gerardi)
Distribution: Occurring west of the Cascades crest in counties along the Puget Sound and outer coast; British Columbia south to Oregon, east sporadically across the U.S. to the northern Atlantic coast of the U.S. and Canada; circumboreal.
Habitat: Coastal salt marshes.
Origin: Both native and introduced - occurring in eastern North America, Eurasia.
Flowers: June-September
Narrow-panicled rush (Juncus brevicaudatus)
Origin: Native
Nevada rush (Juncus nevadensis)
Distribution: Southern British Columbia to California, east to the Rockies, Montana to New Mexico.
Habitat: Wet plasces, margins of streams and lakes, from near sea level to lower elevations in the mountains.
Origin: Native
Flowers: July - August
Northern rush (Juncus alpinoarticulatus)
Distribution: In scattered location on both sides of the Cascades crest in Washington; scattered throughout North America from Alaska to Washington, east across Canada and central U.S. to northeastern North America.
Habitat: Wet meadows, pond and lake shores.
Origin: Native
Flowers: July-September
Parry's rush (Juncus parryi)
Distribution: British Columbia to California, east to Montana and Colorado; in the Olympics and Cascades of Washington
Habitat: Moist places, moderate to high elevations in the mountains
Origin: Native
Flowers: July - September
Path rush (Juncus tenuis)
Distribution: Alaska south to Mexico, east across southern Canada and most of the United States.
Habitat: Moist places.
Origin: Native
Flowers: June - September
Pointed rush (Juncus oxymeris)
Distribution: Southwest British Columbia to Caslifornia; in Washington, in the lowlands west of the Cascades.
Habitat: Wet meadows and lake shores.
Origin: Native
Flowers: May - August
Poverty rush (Juncus tenuis)
Distribution: Alaska south to Mexico, east across southern Canada and most of the United States.
Habitat: Moist places.
Origin: Native
Flowers: June - September
Regel's rush (Juncus regelii)
Origin: Native
Flowers: July - August
Rocky Mountain rush (Juncus saximontanus)
Origin: Native
Flowers: June - August
Round-fruit rush (Juncus compressus)
Origin: Introduced
Salt rush (Juncus breweri)
Origin: Native
Sharp-fruited rush (Juncus acuminatus)
Distribution: Mostly west of the Cascades, British Columbia south to California, east to southwest Idaho and Arizona.
Habitat: Ditches, lake margins, meadows and other wet places.
Origin: Native
Flowers: Late May - August
Shiny rush (Juncus laccatus)
Origin: Native
Short-fruit rush (Juncus brachycarpus)
Origin: Introduced; native to southeastern and midwestern United States
Sickle-leaved rush (Juncus falcatus)
Origin: Native
Flowers: Late May - July
Slender rush (Juncus tenuis)
Distribution: Alaska south to Mexico, east across southern Canada and most of the United States.
Habitat: Moist places.
Origin: Native
Flowers: June - September
Slimpod rush (Juncus diffusissimus)
Origin: Introduced from South America
Small scouring rush (Equisetum ×mackaii)
Origin: Native
Smooth scouring rush (Equisetum laevigatum)
Origin: Native
Spreading rush (Juncus bulbosus)
Distribution: Introduced at several locations in wsestern Washington; British Columbia south to Oregon, east across northern Canada to the Atlantic Coast; Europe.
Habitat: Sandy or peaty shores of streams and pools.
Origin: Introduced from Eurasia
Flowers: August
Spreading rush (Juncus patens)
Origin: Native
Flowers: June - August
Spreading rush (Juncus supiniformis)
Distribution: Alaska south along the coast west of the Cascades to Mendocino County, California.
Habitat: Marshes, ponds, ditches and rivers, often where submerged early in the season.
Origin: Native
Flowers: July - September
Straight-leaved rush (Juncus orthophyllus)
Origin: Native
Flowers: Late June - August
Tapered rush (Juncus acuminatus)
Distribution: Mostly west of the Cascades, British Columbia south to California, east to southwest Idaho and Arizona.
Habitat: Ditches, lake margins, meadows and other wet places.
Origin: Native
Flowers: Late May - August
Thread rush (Juncus filiformis)
Distribution: Alaska to northern Oregon, east in Canada to Newfoundland and south to Pennsylvania and Montana.
Habitat: Lake shores and coastal bogs to montane marshes and meadows; in Washington, from near sea level to about 5000 feet elevation.
Origin: Native
Flowers: July - August
Threeflower rush (Juncus drummondii)
Distribution: Alaska south to California, east to the Rockies, Alberta to New Mexico.
Habitat: Alpine to subalpine meadows, streambanks, talus slopes and ridges.
Origin: Native
Flowers: July - September
Tiehm's dwarf rush (Juncus tiehmii)
Origin: Native
Torrey's rush (Juncus torreyi)
Distribution: British Columbia south, east of the Cascades, to California, east to Ontario and New York.
Habitat: Wet places, especially around lakes and along streams, form the lowlands to the lower mountains.
Origin: Native
Flowers: Late June - August
Tuberous rush (Juncus nodosus)
Distribution: East of the Cascades, British Columbia to California, east to Nova Scotia and Maine.
Habitat: Ditches, ponds and wet places.
Origin: Native
Flowers: Late June - August
Vasey's rush (Juncus vaseyi)
Origin: Native
Western rush (Juncus occidentalis)
Origin: Native
Flowers: June - September
Russian-olive (Elaeagnus angustifolia)
Distribution: Common east of the Cascades in Washington; widely distributed throughout most of North America.
Habitat: Weedy escape, especially in riparian areas; often planted historically as a windbreak.
Origin: Introduced
Flowers: May-July
Russian-sickle (Astragalus falcatus)
Origin: Introduced
Flowers: July
Beardless wild rye (Elymus curvatus)
Origin: Native
Boreal wild rye (Elymus hirsutus)
Origin: Native
Flowers: June - August
Canadian wild rye (Elymus canadensis)
Distribution: Alaska south on the east side of the Cascades to California, east to Quebec, north Carolina and Texas
Habitat: Sandy, dry to moist meadows to mountain canyons.
Origin: Native
Flowers: June - August
Creeping wild rye (Elymus repens)
Distribution: Native to Eurasia; Alaska to Greenland and south to California, Texas, and North Carolina.
Habitat: Disturbed, open areas.
Origin: Introduced
Flowers: June-August
Cultivated rye (Secale cereale)
Distribution: Widely cultivated, especially in poor, dry soil, often persistent for more than one season.
Habitat: Roadsides and waste ground.
Origin: Introduced
Flowers: May - July
Montana wild rye (Elymus albicans)
Origin: Native
Russian-wild rye (Psathyrostachys juncea)
Origin: Introduced
Scribner's wild rye (Elymus scribneri)
Origin: Native
Flowers: June - August
Wawawai wild rye (Elymus wawawaiensis)
Origin: Native
Annual ryegrass (Lolium multiflorum)
Distribution: Introduced and well established in much of temperate North America.
Habitat: Roadsides and waste ground.
Origin: Introduced
Flowers: May - July
English ryegrass (Lolium perenne)
Distribution: Commonly cultivated as a forage plant; escaped and well established in the Pacific Northwest.
Habitat: Old fields, roadsides, and waste places.
Origin: Introduced
Flowers: May - July
Italian ryegrass (Lolium multiflorum)
Distribution: Introduced and well established in much of temperate North America.
Habitat: Roadsides and waste ground.
Origin: Introduced
Flowers: May - July
Perennial ryegrass (Lolium multiflorum)
Distribution: Introduced and well established in much of temperate North America.
Habitat: Roadsides and waste ground.
Origin: Introduced
Flowers: May - July
Perennial ryegrass (Lolium perenne)
Distribution: Commonly cultivated as a forage plant; escaped and well established in the Pacific Northwest.
Habitat: Old fields, roadsides, and waste places.
Origin: Introduced
Flowers: May - July