Vascular Plants

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

Browse by common name:
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Common names beginning with P:
Indian paint (Blitum capitatum)
Distribution: In scattered locations in Washington, chiefly east of the Cascades crest; Alaska south to California, east to the Atlantic Coast primarily in the northern half of North America.
Habitat: Weedy native of low to moderate elevations.
Origin: Native
Flowers: June-August
Growth Duration: Annual
Annual paintbrush (Castilleja minor)
Distribution: Central Washington and eastern Oregon to southern Montana, south to Arizona.
Habitat: Alkaline marshes and meadows, mostly at low elevations.
Origin: Native
Flowers: Late June - September
Growth Duration: Annual, Biennial
Attenuate paintbrush (Castilleja attenuata)
Distribution: Chiefly west of the Cascades in Washington; British Columbia south to California and Arizona.
Habitat: Drier areas at low elevations.
Origin: Native
Flowers: April-June
Growth Duration: Annual
Chambers's Indian paintbrush (Castilleja chambersii)
Distribution: Occurring west of the Cascades crest in Washington, where nown only from Pacific County; Pacific County to Clatsop County, Oregon.
Habitat: Forest openings, embankments, and rock outcroppings typically where moist.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Cliff paintbrush (Castilleja rupicola)
Distribution: Chiefly west of the Cascades in Washington; from southern British Columbia to central Oregon.
Habitat: Rock crevices and rocky slopes, usually above timberline.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Coast paintbrush (Castilleja litoralis)
Origin: Native
Common paintbrush (Castilleja miniata)
Distribution: Occurring throughout much of Washington; Alaska south to California, east to the Rocky Mountains in the U.S., east to Ontario in Canada.
Habitat: Mountain meadows and slopes; also on coastal bluffs; widespread and common.
Origin: Native
Flowers: May-September
Growth Duration: Perennial
Cusick's paintbrush (Castilleja cusickii)
Distribution: East of the Cascades in Washington; Alberta south to Montana and Wyoming, west through Idaho to northeast Oregon.
Habitat: Open areas, lower valleys to subalpine meadows.
Origin: Native
Flowers: April-August
Growth Duration: Perennial
Deer paintbrush (Castilleja cervina)
Distribution: Northeast Washington; British Columbia east to northern Idaho and Montana.
Habitat: Grasslands and woodlands at moderate to mid-elevations
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Elmer's paintbrush (Castilleja elmeri)
Distribution: Occurring east of the Cascades crest in Washington from the Wenatchee Mountains and northward; south-central British Columbia to Kittitas County in Washington.
Habitat: Moist, open slopes at middle elevations to the subalpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Golden paintbrush (Castilleja levisecta)
Distribution: Puget Sound of Washington; Vancouver Island south to the Willamette Valley of Oregon.
Habitat: Meadows and prairies at low elevations.
Origin: Native
Flowers: April-September
Growth Duration: Perennial
Harsh paintbrush (Castilleja hispida)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Oregon, east to southwestern Alberta and Montana.
Habitat: Grassy slopes and forest openings, from sea level to moderate elevations in the mountains
Origin: Native
Flowers: April-August
Growth Duration: Perennial
Obscure paintbrush (Castilleja cryptantha)
Distribution: Endemic to Mt. Rainier National Park and immediate vicinity, Washington.
Habitat: Moist subalpine meadows.
Origin: Native
Flowers: July-August
Growth Duration: Perennial
Pacific paintbrush (Castilleja litoralis)
Origin: Native
Scarlet paintbrush (Castilleja miniata)
Distribution: Occurring throughout much of Washington; Alaska south to California, east to the Rocky Mountains in the U.S., east to Ontario in Canada.
Habitat: Mountain meadows and slopes; also on coastal bluffs; widespread and common.
Origin: Native
Flowers: May-September
Growth Duration: Perennial
Small-flowered paintbrush (Castilleja parviflora)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south to California, east to Alberta.
Habitat: Subalpine meadows and forest openings at high elevations.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Suksdorf's paintbrush (Castilleja suksdorfii)
Distribution: In Washington chiefly in the Cascades from Mt. Adams south, occasionally north to Whatcom County; south to Crater Lake, Oregon.
Habitat: Subalpine meadows and forests along streams and wet areas.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Thin paintbrush (Castilleja tenuis)
Distribution: Both sides of the Cascades in Washington but more common eastward; British Columbia south to California.
Habitat: Vernally moist meadows and other moist sites, from the lowlands to moderate elevations in the mountains.
Origin: Native
Flowers: May-August
Growth Duration: Annual
Thompson's paintbrush (Castilleja thompsonii)
Distribution: East of the Cascade summits in Washington; British Columbia south to Oregon.
Habitat: Dry sagebrush deserts to high mountain ridges.
Origin: Native
Flowers: May-September
Growth Duration: Perennial
Victoria's paintbrush (Castilleja victoriae)
Distribution: San Juan Islands in WA; Victoria, B.C.
Habitat: Seasonally moist balds.
Origin: Native
Flowers: May-June
Growth Duration: Annual
Yellow paintbrush (Castilleja lutescens)
Distribution: Occurring east of the Cascades crest in Washington, chiefly in eastern Washington; British Columbia to Oregon, east to Idaho and Montana.
Habitat: Low, dry grasslands and woodlands, occasionally to high elevations in the mountains.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Paiuteweed (Suaeda calceoliformis)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout North America from Alaska south to California, east to the Great Plains, and also along the coast of eastern North America.
Habitat: Open, moist to wet areas, typically where saline.
Origin: Native
Flowers: June-August
Growth Duration: Annual
Purple pampas grass (Cortaderia jubata)
Distribution: Occurring in lowland western Washington; Washington to California.
Habitat: Disturbed, open areas at low elevation
Origin: Introduced from northern South America
Flowers: June-September
Growth Duration: Perennial
Hairy perennial panicgrass (Dichanthelium acuminatum)
Distribution: Southern British Columbia south along the coast to California; east of the Cascades mainly along water courses or around springs in the mountains, east to Montana and Wyoming.
Habitat: Rocky or sandy river banks or lake margins to open woods, marshy areas or dry prairies, from sea level to high elevation in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Scribner's perennial panicgrass (Dichanthelium oligosanthes)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south on both sides of the Cascades to northern California, east to Idaho, Montana and Utah, also in eastern North America.
Habitat: Dry prairies or rocky areas to sandy stream banks.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Fall panicum (Panicum dichotomiflorum)
Distribution: Native in most of central and eastern United States; occasionally introduced in Washington.
Habitat: Waste ground.
Origin: Introduced
Flowers: May - September
Growth Duration: Annual, Perennial
Desert pansy (Viola trinervata)
Distribution: Occurring east of the Cascades crest in Washington; north-central Washington to southeastern Oregon.
Habitat: Sagebrush flats and rocky hillsides, often on lithosol, where vernally moist.
Origin: Native
Flowers: March-June
Growth Duration: Perennial
European field pansy (Viola arvensis)
Distribution: Both sides of the Cascades in Washington; introduced throughout the United States and Canada.
Habitat: Frequently escapes from cultivation.
Origin: Introduced from Europe
Flowers: March-June
Growth Duration: Annual
Paradise plant (Daphne mezereum)
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; southern British Columbia to Washington, east to northern Idaho and western Montana, also in northeastern North America.
Habitat: Wetlands, forest edges, and fields, where escaped from cultivation.
Origin: Introduced from Europe
Flowers: March-May
Growth Duration: Perennial
Fringed grass of parnassus (Parnassia fimbriata)
Distribution: Occurring on both sides of the Cascades in Washington; Alaska to California, east to Alberta, Montana and New Mexico.
Habitat: Bogs, stream banks and wet meadows, mid- to high elevations in the mountains.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Parsely (Petroselinum crispum)
Distribution: Occurring in scattered locations west of the Cascades crest in Washington at low elevations, where escaping from nearby cultivation; Washington to California, east in scattered locations across the U.S. to the Atlantic Coast.
Habitat: Roadsides, balds, fields, ditches, wastelots, and other disturbed open areas at low elevations.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Biennial
American parsley-fern (Cryptogramma acrostichoides)
Distribution: Ocurring on both sides of the Cascades crest in Washington; Alaska to California, east in cool, moist areas to Ontario and Michigan
Habitat: Cliff crevices and talus slopes at middle to high elevations in the mountains
Origin: Native
Growth Duration: Perennial
Field parsley-piert (Aphanes arvensis)
Distribution: Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; southern British Columbia to California, reported in Idaho, also along Atlantic Coast in the U.S.
Habitat: Ledges, often limy, sandy shores, hot springs, and other disturbed open ground at low elevations.
Origin: Introduced from Eurasia and northern Africa
Flowers: April-May
Growth Duration: Annual
Small-fruited parsley-piert (Aphanes australis)
Distribution: Occurring west of the Cascades crest in Washington; southwestern British Columbia to northwestern Oregon, also in southeastern U.S.
Habitat: Openings, shores, lawns, and other disturbed areas at low elevations.
Origin: Introduced from Europe
Flowers: March-May
Growth Duration: Perennial
Western parsley-piert (Aphanes occidentalis)
Distribution: Occurring west of the Cascades crest in lowland western Washington and east in the Columbia River Gorge; southern British Columbia to California.
Habitat: Vernally damp grasslands, balds, fields, ledges, rocky slopes, open forest, shores, and beaches at low elevations.
Origin: Native
Flowers: April-June
Growth Duration: Annual
Common parsnip (Pastinaca sativa)
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Roadsides, fields, ditches, wastelots, and other disturbed sites at low elevations.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Biennial
Water parsnip (Sium suave)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Swampy places and shallow water of lakes, ponds, and backwater channels, from low to middle elevations.
Origin: Native
Flowers: July-August
Growth Duration: Perennial
Wild parsnip (Pastinaca sativa)
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Roadsides, fields, ditches, wastelots, and other disturbed sites at low elevations.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Biennial
Partridgefoot (Luetkea pectinata)
Distribution: Occurring in the Olympic and Cascades mountains in Washington; Alaska to California, east to Northwest Territory, Alberta, Idaho, and Montana.
Habitat: Usually on sandy soil in moist or shady places, subalpine to alpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Mountain pasqueflower (Anemone occidentalis)
Distribution: Occurring in the Olympic and Cascade mountains in Washington; British Columbia to California, east to Alberta, Montana, Idaho, and the Wallowa Mountains of Oregon.
Habitat: Open slopes and meadows from middle elevations to the alpine.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Pasqueflower (Anemone patens)
Distribution: Occurring east of the Cascades crest in the Wenatchee Mountains in Washington, where disjunct; 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
Growth Duration: Perennial
Western pasqueflower (Anemone occidentalis)
Distribution: Occurring in the Olympic and Cascade mountains in Washington; British Columbia to California, east to Alberta, Montana, Idaho, and the Wallowa Mountains of Oregon.
Habitat: Open slopes and meadows from middle elevations to the alpine.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Pathfinder (Adenocaulon bicolor)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east the northern Rocky Mountains, northern Great Plains, and Great Lakes region.
Habitat: Moist, shady woods at low to middle elevations.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Beach pea (Lathyrus japonicus)
Distribution: Occurring along the Puget Sound and outer coast in Washington; Alaska to California; also along the Atlantic Coast.
Habitat: Sandy beaches, dunes, and headlands along the coast.
Origin: Native
Flowers: May-September
Growth Duration: Perennial
Garden pea (Pisum sativum)
Distribution: Occurring in scattered locations across Washington; British Columbia to California, east across America in scattered locations.
Habitat: Roadsides, fields, wastelots, and other disturbed areas where escaped from cultivation.
Origin: Introduced
Flowers: May-September
Growth Duration: Annual
Tuberous pea (Lathyrus tuberosus)
Distribution: Known from Okanogan County in Washington; Washington and Montana, also in eastern North America.
Origin: Introduced from Eurasia
Flowers: May-July
Growth Duration: Perennial
Peach (Prunus persica)
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; southwestern British Columbia to California, east to Idaho; also in eastern North America.
Habitat: Thickets, shores, and disturbed ground.
Origin: Introduced from eastern Asia
Flowers: April-June
Growth Duration: Perennial
Common pear (Pyrus communis)
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California, east to Idaho, Montana, Utah and New Mexico; also from southcentral U.S. east and northeast to the Atlantic Coast.
Habitat: Grasslands, thickets, shorelines, and forest openings;
Origin: Introduced from Eurasia
Flowers: April-June
Growth Duration: Perennial
Western pearlflower (Heterocodon rariflorus)
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to Montana, Wyoming, and Colorado.
Habitat: Moist, open places in the foothills and valleys to moderate elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Annual
Alpine pearlwort (Sagina saginoides)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains in the U.S. and Alberta; east across northern Canada to Greenland.
Habitat: Open areas, typically where at least seasonally moist, from middle elevations to the alpine.
Origin: Native
Flowers: May-September.
Growth Duration: Biennial, Perennial
Annual pearlwort (Sagina apetala)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California, also occurring in Kansas.
Habitat: Waste ground.
Origin: Introduced from Europe
Flowers: May-June
Growth Duration: Annual
Arctic pearlwort (Sagina saginoides)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains in the U.S. and Alberta; east across northern Canada to Greenland.
Habitat: Open areas, typically where at least seasonally moist, from middle elevations to the alpine.
Origin: Native
Flowers: May-September.
Growth Duration: Biennial, Perennial
Bird-eye pearlwort (Sagina procumbens)
Distribution: Occurring on both sides of the Cascades crest in Washington, though more common west of the crest; Alaska to California, east to the Rocky Mountains, Great Lakes region, and northeastern North America.
Habitat: Moist areas, often where disturbed, at low elevations; common garden weed.
Origin: Introduced from Europe
Flowers: May-October
Growth Duration: Perennial
Stick-stemmed pearlwort (Sagina maxima)
Distribution: Occurring west of the Cascades crest in Washington, often along or near the coast; Alaska to California.
Habitat: Moist sand or rocks.
Origin: Native
Flowers: June-September
Growth Duration: Annual, Perennial
Western pearlwort (Sagina decumbens)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California.
Habitat: Moist soil at low elevations, but not typically coastal.
Origin: Native
Flowers: May-August
Growth Duration: Annual
Tufted vetch (Vicia cracca)
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California, in scattered locations elsewhere in North America.
Habitat: Roadsides, fields, meadows, wastelots, and other disturbed open areas.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Perennial
Siberian peashrub (Caragana arborescens)
Distribution: Occurring east of the Cascades crest in Washington; widely distributed throughout the western, central, and northeastern regions of North America.
Habitat: Disturbed areas including wastelots, roadsides, and fields.
Origin: Introduced from Eurasia
Flowers: April-June
Growth Duration: Perennial
Angled peavine (Lathyrus angulatus)
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; Washington to California.
Habitat: Roadsides, fields, wastelots, and other disturbed open areas.
Origin: Introduced from Europe
Flowers: May-June
Growth Duration: Annual
Beach peavine (Lathyrus littoralis)
Distribution: Occurring in the coastal counties in Washington; British Columbia to California.
Habitat: Sand dunes and sandy beaches.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Cream-flowered peavine (Lathyrus ochroleucus)
Distribution: Occurring east of the Cascades crest along the northern border of Washington; Alaska to Washington, east across the northern U.S. and Canada to the Atlantic Coast.
Habitat: Moist woods, at the edge of thickets.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Earth-nut peavine (Lathyrus tuberosus)
Distribution: Known from Okanogan County in Washington; Washington and Montana, also in eastern North America.
Origin: Introduced from Eurasia
Flowers: May-July
Growth Duration: Perennial
Everlasting peavine (Lathyrus latifolius)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Roadsides, ditches, forest edge, and other disturbed areas, usually where somewhat moist.
Origin: Introduced from Europe
Flowers: May-August
Growth Duration: Perennial
Few-flowered peavine (Lathyrus pauciflorus)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington to California, east to Idaho and Arizona.
Habitat: Shrub-steppe to Ponderosa pine and higher open forests.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Grass peavine (Lathyrus sphaericus)
Distribution: Occurring along the southern border of Washington; British Columbia to California.
Habitat: Fields, roadsides, ditches, and other disturbed open areas.
Origin: Introduced
Flowers: May-June
Growth Duration: Annual
Leafy peavine (Lathyrus polyphyllus)
Distribution: Occurring west of the Cascades crest in lowland Washington, and east up the Columbia River Gorge; Washington to California.
Habitat: Prairies and open areas of low mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Marsh peavine (Lathyrus palustris)
Distribution: Occurring along the Puget Sound and outer coast in Washington; widely distributed throughout most of North America except the Rocky Mountain and southeastern regions of the U.S.
Habitat: Chiefly in tidelands along the coast.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
Narrow-leaf peavine (Lathyrus sylvestris)
Distribution: Occurring chiefly west of the Cascades in Washington; British Columbia to Oregon, east to the Rocky Mountains, also in eastern North America
Habitat: Roadsides and waste places at low elevations.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Perennial
Nevada peavine (Lathyrus lanszwertii)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Montana and Utah.
Habitat: Sagebrush-ponderosa pine woodland to moderate elevations in the mountains.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Pacific peavine (Lathyrus vestitus)
Distribution: Occurring west of the Cascades crest in Washington; Washington to California.
Habitat: Moist woodlands, open slopes, and roadsides.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Perennial peavine (Lathyrus latifolius)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Roadsides, ditches, forest edge, and other disturbed areas, usually where somewhat moist.
Origin: Introduced from Europe
Flowers: May-August
Growth Duration: Perennial
Sierra peavine (Lathyrus nevadensis)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho.
Habitat: Open woods at low to moderate elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Thick-leaved peavine (Lathyrus lanszwertii)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Montana and Utah.
Habitat: Sagebrush-ponderosa pine woodland to moderate elevations in the mountains.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Torrey's peavine (Lathyrus torreyi)
Distribution: Occurring west of the Cascades crest in Washington; Washington to California.
Habitat: Open prairies and clearings in the woods at low elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Winged pectocarya (Pectocarya penicillata)
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to Baja California, east to Idaho and Utah.
Habitat: Dry, open areas, often in sandy soil and among sagebrush, at low elevations.
Origin: Native
Flowers: April-June
Growth Duration: Annual
Pennsylvania pellitory (Parietaria pensylvanica)
Distribution: Occurring east of the Cascades crest in Washington; Yukon Territory south to California, east across southern Canada and the U.S. to the Atlantic Coast.
Habitat: Woods to shaded banks, beneath ledges of large rocks, from low to middle elevations.
Origin: Native
Flowers: May-September
Growth Duration: Perennial
Pellitory-of-the-wall (Parietaria judiaca)
Origin: Introduced from Africa and Eurasia
Growth Duration: Perennial
Tinker's penny (Hypericum anagalloides)
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia south to Baja California, east to Montana.
Habitat: Moist ground, from the coast to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Fendler's pennycress (Noccaea fendleri)
Distribution: Occurring on both sides of the Cascades crest in Washington; Washington to California, east to the Rocky Mountains and Texas.
Habitat: Common in open, rocky areas from middle elevations to the subalpine.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Field pennycress (Thlaspi arvense)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Weed of waste ground, low to moderate elevations.
Origin: Introduced from Europe
Flowers: April-August
Growth Duration: Annual
Perfoliate pennycress (Microthlaspi perfoliatum)
Distribution: Occurring east of the Cascades crest in southeastern Washington; southeastern Washington and western Idaho, also in the central and eastern U.S.
Habitat: Roadsides, pastures, and other open, disturbed ground.
Origin: Introduced from Europe
Flowers: March-May
Growth Duration: Annual
Pennyroyal (Mentha pulegium)
Distribution: Southern and southwestern Washington along the Columbia River; British Columbia south to California; scattered in eastern North America.
Habitat: Moist, disturbed areas.
Origin: Introduced from Europe
Flowers: July-October
Growth Duration: Perennial
Blue Mountain penstemon (Penstemon venustus)
Distribution: Occurring east of the Cascades in Washington, especially in the Blue Mountains area; Washington south to California and Utah, east to Idaho.
Habitat: Open, rocky slopes, from the foothills to moderate elevations in the mountains.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Broad-leaved penstemon (Penstemon ovatus)
Distribution: Occurring on both sides of the Cascades crest in Washington; southern British Columbia to Oregon.
Habitat: Open woods below 3000 feet in elevation.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Bush penstemon (Penstemon fruticosus)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to Oregon, east to Montana and Wyoming.
Habitat: Common in rocky, open or wooded areas, foothills to rather high elevations in the mountains.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Coast penstemon (Penstemon serrulatus)
Distribution: Occurring on both sides of the Cascades crest and in the Olympic Mountains in Washington; southern British Columbia to Oregon.
Habitat: Moist to wet meadows and forest openings, from low elevations to the subalpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Crested-tongue penstemon (Penstemon eriantherus)
Distribution: Occurring east of the Cascades crest chiefly in central and northeastern Washington; Southeast British Columbia to Oregon, east to the northern Great Plains.
Habitat: Dry, open places in the valleys, plains and foothills, sometimes ascending to middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Davidson's penstemon (Penstemon davidsonii)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California and Nevada.
Habitat: Open, rocky areas, from middle to high elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Fuzzy-tongue penstemon (Penstemon eriantherus)
Distribution: Occurring east of the Cascades crest chiefly in central and northeastern Washington; Southeast British Columbia to Oregon, east to the northern Great Plains.
Habitat: Dry, open places in the valleys, plains and foothills, sometimes ascending to middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Gairdner's penstemon (Penstemon gairdneri)
Distribution: East of the Cascades in Washington; Washington south to Oregon, east to Idaho.
Habitat: Dry, open sagebrush desert and scablands, low to moderate elevations in the mountains.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Glandular penstemon (Penstemon glandulosus)
Distribution: Occurring east of the Cascades crest in Washington along the east base of the Cascades; Chelan to Klickitat Counties, Washington, and at scattered locations in Oregon and Idaho.
Habitat: Open, often rocky hillsides and banks in the foothills, valleys, and lower mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Hot-rock penstemon (Penstemon deustus)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Montana and Utah.
Habitat: Dry sites at moderate to mid-elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Lyall's penstemon (Penstemon lyallii)
Distribution: Occurring east of the Cascades crest in northeastern Washington; southeastern British Columbia to northeastern Washington, east to Alberta, northern Idaho, and northwestern Montana.
Habitat: Rocky slopes, talus, and rock outcrops.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Palmer's penstemon (Penstemon palmeri)
Distribution: Reported from Spokane County in Washington; Washington south to California, east to the Rocky Mountains.
Habitat: Roadsides where seeded for soil stabilization.
Origin: Introduced from southwestern United States
Flowers: May-July
Growth Duration: Perennial
Richardson's penstemon (Penstemon richardsonii)
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to north-central and northeast Oregon.
Habitat: Cliff crevices and other dry, rocky places at low to moderate elevations.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Rock penstemon (Penstemon rupicola)
Distribution: Occurring on both sides of the Cascades crest and in the Columbia River Gorge in Washington; Washington to California.
Habitat: Rock cliffs and rocky slopes from middle elevations in the mountains to the alpine.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Sand dune penstemon (Penstemon acuminatus)
Distribution: Occurring from Chelan and Douglas counties south along the Columbia River to Klickitat County; central Washington to north-central Oregon, also from southeastern Oregon to northern Nevada, east to southwestern Idaho.
Habitat: Dry, open, sandy places at low elevations.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Sharp-leaved penstemon (Penstemon acuminatus)
Distribution: Occurring from Chelan and Douglas counties south along the Columbia River to Klickitat County; central Washington to north-central Oregon, also from southeastern Oregon to northern Nevada, east to southwestern Idaho.
Habitat: Dry, open, sandy places at low elevations.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Showy penstemon (Penstemon speciosus)
Distribution: East of the Cascades in Washington; Washington south to California, east to Nevada and Utah.
Habitat: Dry, open or sparsely wooded areas, often with sagebrush, juniper or ponderosa pine, mostly in the lowlands and foothills.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Shrubby penstemon (Penstemon fruticosus)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to Oregon, east to Montana and Wyoming.
Habitat: Common in rocky, open or wooded areas, foothills to rather high elevations in the mountains.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Small-flowered penstemon (Penstemon procerus)
Distribution: Widely distributed throughout Washington; Alaska south to California, east to North Dakota, Wyoming and Colorado.
Habitat: Moist forest openings at moderate elevations to rocky slopes at high elevations.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Sulphur penstemon (Penstemon attenuatus)
Distribution: Occurring east of the Cascades crest in Washington; southeastern British Columbia to northeastern Oregon, east to western Montana and Wyoming.
Habitat: Dry to moist meadows and woodland slopes from the lowlands to the subalpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Taper-leaved penstemon (Penstemon attenuatus)
Distribution: Occurring east of the Cascades crest in Washington; southeastern British Columbia to northeastern Oregon, east to western Montana and Wyoming.
Habitat: Dry to moist meadows and woodland slopes from the lowlands to the subalpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Brown's peony (Paeonia brownii)
Distribution: Occurring east of the Cascades crest in Washington; central Washington to California, east to Montana and Utah.
Habitat: Sagebrush deserts to ponderosa pine forest opening and edges.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Western peony (Paeonia brownii)
Distribution: Occurring east of the Cascades crest in Washington; central Washington to California, east to Montana and Utah.
Habitat: Sagebrush deserts to ponderosa pine forest opening and edges.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Water pepper (Persicaria hydropiperoides)
Distribution: Chiefly west of the Cascades in Washington; British Columbia south to Mexico and South America, east across North America to the Atlantic coast.
Habitat: Moist to swampy areas, often growing in mud, from the lowlands to the lower mountain valleys.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Alkali peppergrass (Lepidium dictyotum)
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Idaho, Nevada, and Utah.
Habitat: Open areas often where seasonally moist, such as vernal ponds; tolerant of alkaline soils.
Origin: Native
Flowers: April-May
Growth Duration: Annual
Branched peppergrass (Lepidium ramosissimum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east to the northern Great Plains and northeastern North America.
Habitat: Sagebrush, ponderosa pine forest openings, roadsides, fields, and other disturbed open areas.
Origin: Native
Flowers: June-August
Growth Duration: Annual, Biennial, Perennial
Broad-leaved peppergrass (Lepidium latifolium)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Great Plains and eastern North America.
Habitat: Disturbed, moist areas, irrigated land, stream banks, and drier upland areas.
Origin: Introduced from Eurasia
Flowers: June-September
Growth Duration: Perennial
Clasping-leaved peppergrass (Lepidium perfoliatum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Atlantic Coast.
Habitat: Disturbed areas, such as overgrazed land and waste areas, usually where dry.
Origin: Introduced from Eurasia
Flowers: March-June
Growth Duration: Annual, Biennial
Common peppergrass (Lepidium densiflorum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast.
Habitat: Dry, open areas.
Origin: Native
Flowers: April-June
Growth Duration: Annual, Biennial
Elongate peppergrass (Lepidium densiflorum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast.
Habitat: Dry, open areas.
Origin: Native
Flowers: April-June
Growth Duration: Annual, Biennial
Field peppergrass (Lepidium campestre)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Roadsides, fields, meadows, river and stream banks, wastelots, and other distrubed open, often dry soils.
Origin: Introduced from Eurasia
Flowers: May-July
Growth Duration: Annual, Biennial
Hairy-fruited peppergrass (Lepidium densiflorum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast.
Habitat: Dry, open areas.
Origin: Native
Flowers: April-June
Growth Duration: Annual, Biennial
Large-fruited peppergrass (Lepidium densiflorum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast.
Habitat: Dry, open areas.
Origin: Native
Flowers: April-June
Growth Duration: Annual, Biennial
Peppergrass (Lepidium latifolium)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Great Plains and eastern North America.
Habitat: Disturbed, moist areas, irrigated land, stream banks, and drier upland areas.
Origin: Introduced from Eurasia
Flowers: June-September
Growth Duration: Perennial
Prairie peppergrass (Lepidium densiflorum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast.
Habitat: Dry, open areas.
Origin: Native
Flowers: April-June
Growth Duration: Annual, Biennial
Round-leaved peppergrass (Lepidium perfoliatum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Atlantic Coast.
Habitat: Disturbed areas, such as overgrazed land and waste areas, usually where dry.
Origin: Introduced from Eurasia
Flowers: March-June
Growth Duration: Annual, Biennial
Shining peppergrass (Lepidium nitidum)
Distribution: Known from Klickitat County in Washington; south-central Washington to California.
Habitat: Dry, open areas at low elevation.
Origin: Native
Flowers: March-April
Growth Duration: Annual
Upright peppergrass (Lepidium strictum)
Distribution: Occurring west of the Cascades crest in Washington; western Washington to southwestern Oregon.
Habitat: Disturbed ground at low elevations.
Origin: Introduced from Europe
Flowers: April-May
Growth Duration: Annual
Veiny peppergrass (Lepidium dictyotum)
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Idaho, Nevada, and Utah.
Habitat: Open areas often where seasonally moist, such as vernal ponds; tolerant of alkaline soils.
Origin: Native
Flowers: April-May
Growth Duration: Annual
Yellow-flowered peppergrass (Lepidium perfoliatum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Atlantic Coast.
Habitat: Disturbed areas, such as overgrazed land and waste areas, usually where dry.
Origin: Introduced from Eurasia
Flowers: March-June
Growth Duration: Annual, Biennial
Peppermint (Mentha ×piperita)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout in North America.
Habitat: Banks of streams and ditches, bottom lands and moist roadsides.
Origin: Introduced
Flowers: July-September
Growth Duration: Perennial
Purple-anther pepperweed (Lepidium heterophyllum)
Distribution: Occurring chiefly west of the Cascades crest and in the Columbia River Gorge in Washington; southwestern British Columbia to California, also in scattered locations in the eastern U.S.
Habitat: Roadsides, fields, meadows, pastures, wastelots, and other disturbed ground.
Origin: Introduced from Europe
Flowers: May-June
Growth Duration: Perennial
Smith's pepperweed (Lepidium heterophyllum)
Distribution: Occurring chiefly west of the Cascades crest and in the Columbia River Gorge in Washington; southwestern British Columbia to California, also in scattered locations in the eastern U.S.
Habitat: Roadsides, fields, meadows, pastures, wastelots, and other disturbed ground.
Origin: Introduced from Europe
Flowers: May-June
Growth Duration: Perennial
Tall pepperweed (Lepidium virginicum)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Beach strand, grassy balds, grasslands, and other open areas at low elevations.
Origin: Native
Flowers: March-June
Growth Duration: Annual
Broad-leaved pepperwort (Lepidium latifolium)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Great Plains and eastern North America.
Habitat: Disturbed, moist areas, irrigated land, stream banks, and drier upland areas.
Origin: Introduced from Eurasia
Flowers: June-September
Growth Duration: Perennial
Forked pepperwort (Lepidium oxycarpum)
Distribution: Occurring west of the Cascades crest in the San Juan Islands; disjunct in southern Vancouver Island and adjacent San Juan Islands, otherwise occurring in central California.
Habitat: Vernal pools and saline soils.
Origin: Native
Flowers: March-May
Growth Duration: Annual
Hairy pepperwort (Marsilea vestita)
Distribution: Occurring chiefly east of the Cascades crest and in the Columbia River Gorge in Washington; British Columbia to California, east to the Great Plains and southeastern U.S.
Habitat: Ponds, vernal pools, and floodplains from low to middle elevations.
Origin: Native
Spores: April-October
Growth Duration: Perennial
Hoary pepperwort (Lepidium draba)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Roadsides, fields, sagebrush desert, wastelots, and disturbed areas at low to middle elevations.
Origin: Introduced from Eurasia
Flowers: April-August
Growth Duration: Perennial
Nelson's pepperwort (Marsilea oligospora)
Distribution: Occurring east of the Cascades crest in Washington Washington to California, east to Montana, Wyoming, and Utah.
Habitat: Ponds and marshes, in wet depressions in sagebrush and less commonly on river margins.
Origin: Native
Spores: June-October
Growth Duration: Perennial
Pepperwort (Lepidium campestre)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Roadsides, fields, meadows, river and stream banks, wastelots, and other distrubed open, often dry soils.
Origin: Introduced from Eurasia
Flowers: May-July
Growth Duration: Annual, Biennial
Sharpfruited pepperwort (Lepidium oxycarpum)
Distribution: Occurring west of the Cascades crest in the San Juan Islands; disjunct in southern Vancouver Island and adjacent San Juan Islands, otherwise occurring in central California.
Habitat: Vernal pools and saline soils.
Origin: Native
Flowers: March-May
Growth Duration: Annual
Water-clover pepperwort (Marsilea vestita)
Distribution: Occurring chiefly east of the Cascades crest and in the Columbia River Gorge in Washington; British Columbia to California, east to the Great Plains and southeastern U.S.
Habitat: Ponds, vernal pools, and floodplains from low to middle elevations.
Origin: Native
Spores: April-October
Growth Duration: Perennial
Greater periwinkle (Vinca major)
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California, east to Idaho, Utah, and Arizona,
Habitat: Disturbed forest understory and edge, roadsides, wastelots, and other disturbed areas at low elevations.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Perennial
Lesser periwinkle (Vinca minor)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to Oregon, also in Montana, and east across the Great Plains to eastern North America.
Habitat: Disturbed forest understory and edge, roadsides, wastelots, and other disturbed areas at low elevations.
Origin: Introduced from Europe
Flowers: March-May
Growth Duration: Perennial
Bolander's phacelia (Phacelia bolanderi)
Distribution: Occurring west of the Cascades crest in lowland southwestern Washington; Coos Bay, Oregon south along the coast to Sonoma County, California.
Habitat: Mostly on open, often unstable slopes at low elevations.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Branched phacelia (Phacelia ramosissima)
Distribution: Occurring east of the Cascades crest in Washington; south-central British Columbia to California, east to southwestern Idaho and Arizona.
Habitat: Dry, open places in the plains and foothills, commonly on basaltic talus, ledges and cliffs.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Dwarf phacelia (Phacelia tetramera)
Distribution: Occurring east of the Cascades crest in central Washington; central Washington to California, east to Idaho, Wyoming and Utah.
Habitat: Alkaline flats and washes at low to middle elevations.
Origin: Native
Flowers: May-June
Growth Duration: Annual
Least phacelia (Phacelia minutissima)
Distribution: Occurring east of the Cascades crest in Kittitas County in Washington; central Washington to northeastern Nevada, east to Idaho.
Habitat: Meadows and forest openings at middle elevations in the mountains.
Origin: Native
Flowers: June-July
Growth Duration: Annual
Low phacelia (Phacelia humilis)
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Nevada.
Habitat: Moist to moderately dry soil at low to middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Annual
Shade phacelia (Phacelia nemoralis)
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California.
Habitat: Thickets and woodlands, usually in fairly dry and shady areas, at low elevations.
Origin: Native
Flowers: April-July
Growth Duration: Biennial, Perennial
Silky phacelia (Phacelia sericea)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains.
Habitat: Open, often rocky areas, from middle elevations in the mountains to the alpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Silverleaf phacelia (Phacelia hastata)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the northern Great Plains.
Habitat: Dry, open, often sandy areas, low to high elevations.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Sticky phacelia (Phacelia glandulifera)
Distribution: Occurring east of the Cascades crest in central Washington; Washington to California, east to Idaho, Nevada, Utah, and Wyoming.
Habitat: Open areas in sagebrush desert.
Origin: Native
Flowers: June
Growth Duration: Annual
Thread-leaf phacelia (Phacelia linearis)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Common in dry, open places in the foothills and plains to moderate elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: Annual
Whiteleaf phacelia (Phacelia hastata)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the northern Great Plains.
Habitat: Dry, open, often sandy areas, low to high elevations.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Woodland phacelia (Phacelia nemoralis)
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California.
Habitat: Thickets and woodlands, usually in fairly dry and shady areas, at low elevations.
Origin: Native
Flowers: April-July
Growth Duration: Biennial, Perennial
Summer pheasant's-eye (Adonis aestivalis)
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Montana, Idaho, and Utah.
Habitat: Fields, roadsides, wastelots, and other disturbed areas.
Origin: Introduced from Europe
Flowers: May-June
Growth Duration: Annual
Clumped phlox (Phlox caespitosa)
Distribution: Occurring east of the Cascades crest in Washington; south-central British Columbia to south-central Washington, east to Idaho and Montana.
Habitat: Primarily in and near Ponderosa pine forest.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Clustered phlox (Phlox caespitosa)
Distribution: Occurring east of the Cascades crest in Washington; south-central British Columbia to south-central Washington, east to Idaho and Montana.
Habitat: Primarily in and near Ponderosa pine forest.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Henderson's phlox (Phlox hendersonii)
Distribution: Occurring east of the Cascades crest and in the Olympic Mountains in Washington; Washington to central Oregon.
Habitat: Open, often rocky areas, mid- to high elevations in the mountains.
Origin: Native
Flowers: July-August
Growth Duration: Perennial
Hood's phlox (Phlox hoodii)
Distribution: Occurring east of the Cascades crest in Washington; Alaska south to California, east to the Rocky Mountains and Great Plains in the north.
Habitat: Dry, open places in the plains and foothills, often in lithosol, occasionally to moderate elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Long-leaf phlox (Phlox longifolia)
Distribution: Widely distributed east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Sagebrush desert to ponderosa pine forest openings, from low to middle elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Many-flowered phlox (Phlox multiflora)
Distribution: Occurring east of the Cascades crest in the southeastern counties in Washington; southeastern Washington to northwestern Nevada, east to the Rocky Mountains.
Habitat: Ponderosa pine forest openings and open meadows from middle elevations to the subalpine.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Prickly phlox (Linanthus pungens)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Baja California, east to the Rocky Mountains.
Habitat: Dry, open, sandy or rocky places, from sagebrush desert and plains to moderate elevations in the drier mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Showy phlox (Phlox speciosa)
Distribution: Widely distributed east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Shrub-steppe, often with sagebrush, and in ponderosa pine forest openings.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Slender phlox (Microsteris gracilis)
Distribution: Occurring on both sides of the Cascades crest in Washington, though more common east of the crest; Alaska to California, east to the Rocky Mountains and Great Plains.
Habitat: Lowlands and foothills in open, dry to moderately moist places.
Origin: Native
Flowers: March-June
Growth Duration: Annual
Snake River phlox (Phlox colubrina)
Distribution: Occurring east of the Cascades crest in the southeastern counties in Washington; southeastern Washington to adjacent northeastern Oregon and western Idaho.
Habitat: Dry, open slopes and cliffs.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Spreading phlox (Phlox diffusa)
Distribution: Widely distributed throughout most of Washington; British Columbia south to California, east to the Rocky Mountains and into the Great Plains in the north.
Habitat: Open, often rocky areas, mid- to high elevations in the mountains.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Sticky phlox (Phlox viscida)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to Arizona, east to Idaho, Utah, and New Mexico.
Habitat: Open areas in grasslands and ponderosa pine forest.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Stiff phlox (Phlox caespitosa)
Distribution: Occurring east of the Cascades crest in Washington; south-central British Columbia to south-central Washington, east to Idaho and Montana.
Habitat: Primarily in and near Ponderosa pine forest.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Tufted phlox (Phlox caespitosa)
Distribution: Occurring east of the Cascades crest in Washington; south-central British Columbia to south-central Washington, east to Idaho and Montana.
Habitat: Primarily in and near Ponderosa pine forest.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Yeti phlox (Phlox solivaga)
Distribution: Occurring east of the Cascades crest, where endemic to the southeastern counties in Washington.
Habitat: Windswept, rocky soil of montane to subalpine ridgelines.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Pickerel-weed (Pontederia cordata)
Origin: Introduced
Pickleweed (Salicornia pacifica)
Distribution: Along the coast in Washington; Alaska to Baja California.
Habitat: Salt marshes and beaches along coast.
Origin: Native
Flowers: June-October
Growth Duration: Perennial
Pigeonberry (Phytolacca americana)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Roadsides, pastures, clearings, wastelots, and other disturbed areas.
Origin: Introduced
Flowers: June-August
Growth Duration: Perennial
Piggyback-plant (Tolmiea menziesii)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California.
Habitat: Moist woods and stream banks, from low to middle elevations in the mountains.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Green pigweed (Amaranthus hybridus)
Distribution: Found in much of the United States, but uncommon in the Pacific Northwest; collected in Whitman County
Habitat: Dry areas, disturbed sites, agricultural fields.
Origin: Introduced from riparian zones in eastern North America
Flowers: July - September
Growth Duration: Annual
Pigweed (Chenopodium album)
Distribution: Widely distributed throughout Washington; widely distributed throughout much of temperate North America.
Habitat: Widespread weed of disturbed areas, including gardens, roadsides, and waste lots.
Origin: Introduced from Europe, but some populations in the mid-west may be native to North America, according to FNA
Flowers: June-September
Growth Duration: Annual
Prostrate pigweed (Amaranthus blitoides)
Distribution: Introduced in the Pacific Northwest; more common east of the Cascades
Habitat: Dry, disturbed areas
Origin: Introduced from central United States
Flowers: June - September
Growth Duration: Annual
Redroot pigweed (Amaranthus retroflexus)
Distribution: In scattered locations throughout Washington, but more commonly east of the Cascade crest; widely distributed throughout much of North America.
Habitat: Disturbed areas.
Origin: Introduced from eastern and central North America
Flowers: July-October
Growth Duration: Annual
Rough pigweed (Amaranthus retroflexus)
Distribution: In scattered locations throughout Washington, but more commonly east of the Cascade crest; widely distributed throughout much of North America.
Habitat: Disturbed areas.
Origin: Introduced from eastern and central North America
Flowers: July-October
Growth Duration: Annual
Smooth pigweed (Amaranthus hybridus)
Distribution: Found in much of the United States, but uncommon in the Pacific Northwest; collected in Whitman County
Habitat: Dry areas, disturbed sites, agricultural fields.
Origin: Introduced from riparian zones in eastern North America
Flowers: July - September
Growth Duration: Annual
White pigweed (Amaranthus albus)
Distribution: Occurring east of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: Dry, disturbed areas.
Origin: Introduced from tropical America
Flowers: June-September
Growth Duration: Annual
Winged pigweed (Cycloloma atriplicifolium)
Origin: Introduced
American pillwort (Pilularia americana)
Distribution: Occurring east of the Cascades in far eastern Washington; disjunct in eastern Washington, otherwise Oregon to California, also in the central and southeastern U.S.
Habitat: Shallow ponds, vernal pools, and reservoir margins.
Origin: Native
Spores: June-October
Growth Duration: Perennial
False pimpernel (Lindernia dubia)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout North America.
Habitat: Disturbed, open soil, often where moist near ponds, lakes, and streams, from low to middle elevations.
Origin: Native
Flowers: May-October
Growth Duration: Annual
Scarlet pimpernel (Lysimachia arvensis)
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California, east across much of North America to the Atlantic Coast.
Habitat: Roadsides, fields, wastelots, and other disturbed, open areas.
Origin: Introduced from Eurasia
Flowers: May-June
Growth Duration: Annual, Biennial
Water pimpernel (Samolus parviflorus)
Distribution: Occurring west of the Cascades crest along the Lower Columbia River in southwestern Washington; southwestern Washington to adjacent northwestern Oregon, otherwise in California, east across the southern U.S. to eastern North America.
Habitat: Freshwater intertidal zone.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Thompson's pincushion (Chaenactis thompsonii)
Distribution: Occurring east of the Cascades crest in Washington, where endemic to the Wenatchee Mountains.
Habitat: Open, usually rocky areas, at middle elevations.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Alva Day's pincushion-plant (Navarretia sinistra)
Distribution: Occurring east of the Cascades crest in central Washington; north-central Washington to California, east to southern Idaho, Utah, and Colorado.
Habitat: Meadows and open or lightly wooded slopes, from the foothills to middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Annual
Divaricate pincushion-plant (Navarretia divaricata)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to Montana and Nevada.
Habitat: Dry, open places from the foothills to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Annual
Marigold pincushion-plant (Navarretia tagetina)
Distribution: Klickitat County, Washington, south to California.
Habitat: Dry, open places at low elevations.
Origin: Native
Flowers: May - June
Growth Duration: Annual
Mountain pincushion-plant (Navarretia divaricata)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to Montana and Nevada.
Habitat: Dry, open places from the foothills to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Annual
Yellow pincushion-plant (Navarretia breweri)
Distribution: East of the Cascades, Douglas County, Washington, south to California, east to Wyoming and Arizona
Habitat: Dry, open areas and meadows, from the foothills to moderate elevations in the mountains
Origin: Native
Flowers: May - July
Growth Duration: Annual
Lodgepole pine (Pinus contorta)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains and South Dakota.
Habitat: Dry montane forests, rocky balds, coastal bluffs and sand dunes, and sphagnum bogs.
Origin: Native
Cones: April-June
Growth Duration: Perennial
Ponderosa pine (Pinus ponderosa)
Distribution: Occurring mostly east of the Cascades crest in Washington; British Columbia to Baja California, east to the Great Plains.
Habitat: Mostly dry areas in open forests at low to middle elevations.
Origin: Native
Cones: May-June
Growth Duration: Perennial
Western white pine (Pinus monticola)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Alberta, Montana, and Wyoming.
Habitat: Moist valleys and drier slopes, near sea level to middle elevations in the mountains.
Origin: Native
Cones: May-June
Growth Duration: Perennial
Western yellow pine (Pinus ponderosa)
Distribution: Occurring mostly east of the Cascades crest in Washington; British Columbia to Baja California, east to the Great Plains.
Habitat: Mostly dry areas in open forests at low to middle elevations.
Origin: Native
Cones: May-June
Growth Duration: Perennial
White-bark pine (Pinus albicaulis)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Wyoming and Montana.
Habitat: Generally near timberline, preferring south-facing slopes.
Origin: Native
Cones: June-July
Growth Duration: Perennial
California pine-foot (Pityopus californicus)
Distribution: Occurring west of the Cascades crest in Washington; disjunct in west-central Washington, otherwise Lane County, Oregon to northern California.
Habitat: Old-growth coniferous forest.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Woodland pinedrops (Pterospora andromedea)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Great Plains and northeastern North America
Habitat: Common in coniferous forests, especially where ponderosa is dominant.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Pinegrass (Calamagrostis rubescens)
Distribution: British Columbia to California, east to Alberta, Montana and Colorado
Habitat: Dry to moist areas, open sagebrush flats to timbered slopes, moderate to mid-elevations in the mountains
Origin: Native
Flowers: Late June - August
Growth Duration: Perennial
Fringed pinesap (Pleuricospora fimbriolata)
Distribution: Western slope of the Cascades and the Olympic Mountains in Washington; Washington south to California.
Habitat: Uncommon in coniferous forests at mid-elevations.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Deptford pink (Dianthus armeria)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Roadsides, fields, forest edge, wastelots, and other disturbed areas at low elevation.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Annual, Biennial
Maiden pink (Dianthus deltoides)
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains, east across Canada and from the midwestern U.S. to the Atlantic Coast.
Habitat: Roadsides, fields, wastelots, and other disturbed open areas.
Origin: Introduced from Europe
Flowers: April-July
Growth Duration: Perennial
Windmill pink (Silene gallica)
Distribution: Occurring west of the Cascades crest in lowland western Washington; British Columbia to California, east to the Rocky Mountains; also in eastern North America.
Habitat: Weed of disturbed soil and wasteland.
Origin: Introduced from Europe
Flowers: May-July
Growth Duration: Annual
Pinkfairies (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
Growth Duration: Annual
Common Pipsissewa (Chimaphila umbellata)
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, northern Great Plains, Great Lakes region, and eastern North America.
Habitat: Wooded areas, mostly coniferous forest, low to middle elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Little pipsissewa (Chimaphila menziesii)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Montana and Utah.
Habitat: Coniferous forests from low to middle elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Devil's pitchfork (Bidens frondosa)
Distribution: Occurring on both sides of the Cascades crest in Washington; southern British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Shores of ponds, lakes, backwater channels, and other wetland areas at low elevations, often where disturbed.
Origin: Native
Flowers: June-October
Growth Duration: Annual
Flax-leaved plainsmustard (Sisymbrium linifolium)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Arizona (not including California), east to the Rocky Mountains.
Habitat: Sagebrush-steppe communities, rock crevices.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Salmon River plainsmustard (Sisymbrium linifolium)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to Arizona (not including California), east to the Rocky Mountains.
Habitat: Sagebrush-steppe communities, rock crevices.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
American plane-tree (Platanus occidentalis)
Distribution: Occurring along the shores of the Columbia River in central and south-central Washington; common and native in central and eastern North America.
Habitat: Near streams, lakes, and moist ravines, often where disturbed.
Origin: Introduced
Flowers: April-May
Growth Duration: Perennial
Gopher plant (Euphorbia lathyris)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia south to California and Arizona, widely distributed in eastern North America.
Habitat: Disturbed soil and wasteland.
Origin: Introduced from Eurasia
Flowers: April-May
Growth Duration: Annual
Money plant (Lunaria annua)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California and Utah; also distributed throughout eastern North America.
Habitat: Escaping from cultivation to urban forests, roadsides, and other disturbed areas.
Origin: Introduced from southeast Europe
Flowers: March-June
Growth Duration: Annual
Monument plant (Frasera speciosa)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington to California, east to the Great Plains.
Habitat: Slopes, forest openings, and meadows from middle elevations to the subalpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Oyster plant (Tragopogon porrifolius)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Roadsides, fields and waste places, usually where moist.
Origin: Introduced from Europe
Flowers: April-August
Growth Duration: Biennial
White-topped pitcher plant (Sarracenia leucophylla)
Origin: Introduced from southeast United States
Growth Duration: Perennial
Yellow pitcher plant (Sarracenia flava)
Distribution: Native in southeastern United States; introduced in western Washington.
Habitat: Swamps, bogs and seeps.
Origin: Introduced from southeast United States
Flowers: May - June
Growth Duration: Perennial
Alaska plantain (Plantago macrocarpa)
Distribution: Occurring along the outer coast in Washington; Alaska south to Oregon.
Habitat: Coastal wetlands.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Buck-horn plantain (Plantago coronopus)
Distribution: West of the Cascades along the coast in Washington; British Columbia south to California; scattered locations in central and eastern North America.
Habitat: Occasional at low elevations along the coast in sandy or disturbed areas.
Origin: Introduced
Flowers: May-October
Growth Duration: Annual, Biennial
Common plantain (Plantago major)
Distribution: Widely distributed throughout Washington; a cosmopolitan weed widely distributed throughout North America.
Habitat: Roadsides, fields and other disturbed, open areas.
Origin: Introduced from Europe
Flowers: April-August
Growth Duration: Perennial
Dwarf plantain (Plantago pusilla)
Origin: Introduced from eastern North America
Growth Duration: Annual
English plantain (Plantago lanceolata)
Distribution: Widely distributed throughout Washington; a cosmopolitan weed distributed widely throughout North America.
Habitat: Roadsides, fields and other disturbed, open areas.
Origin: Introduced from Europe
Flowers: April-August
Growth Duration: Perennial
Great plantain (Plantago major)
Distribution: Widely distributed throughout Washington; a cosmopolitan weed widely distributed throughout North America.
Habitat: Roadsides, fields and other disturbed, open areas.
Origin: Introduced from Europe
Flowers: April-August
Growth Duration: Perennial
Mexican plantain (Plantago subnuda)
Distribution: West of the Cascades in Washington in the southwestern portion of the state; Washington south to California.
Habitat: Tidal flats and coastal bluffs.
Origin: Native
Flowers: May-September
Growth Duration: Perennial
Sand plantain (Plantago arenaria)
Distribution: Scattered locations west of the Cascades in Washington; British Columbia south to California; upper central and eastern North America.
Habitat: A weed of waste places, sandy areas, roadsides, and along railroad tracks.
Origin: Introduced
Flowers: June-October
Growth Duration: Annual
Sea plantain (Plantago maritima)
Distribution: West of the Cascades in Washington along the coast; British Columbia south to California.
Habitat: Salt marshes, bluffs and cliffs along the coast.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Seaside plantain (Plantago maritima)
Distribution: West of the Cascades in Washington along the coast; British Columbia south to California.
Habitat: Salt marshes, bluffs and cliffs along the coast.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Slender plantain (Plantago elongata)
Distribution: West of the Cascades in Washington, often along the coast; British Columbia south to California, east to Minnesota and Texas.
Habitat: Moist, somewhat saline areas.
Origin: Native
Flowers: April-June
Growth Duration: Annual
Tall coastal plantain (Plantago subnuda)
Distribution: West of the Cascades in Washington in the southwestern portion of the state; Washington south to California.
Habitat: Tidal flats and coastal bluffs.
Origin: Native
Flowers: May-September
Growth Duration: Perennial
Woolly plantain (Plantago patagonica)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to Texas.
Habitat: Dry, open places in the foothills and plains.
Origin: Native
Flowers: April-June
Growth Duration: Annual
Long-horn plectritis (Plectritis macrocera)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Vernally moist, open areas; common in shrub-steppe
Origin: Native
Flowers: March-June
Growth Duration: Annual
Long-spurred plectritis (Plectritis ciliosa)
Distribution: Occurring east of the Cascades crest in Skamania and Klickitat counties in Washington; south-central Washington to California.
Habitat: Vernally moist, open slopes and meadows.
Origin: Native
Flowers: April-May
Growth Duration: Annual
Rosy plectritis (Plectritis congesta)
Distribution: Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; southwestern British Columbia to California.
Habitat: Open, vernally moist balds, prairies, meadows and slopes, from sea level to middle elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: Annual
Shortspur white plectritis (Plectritis brachystemon)
Distribution: Occurring west of the Cascades crest and in the Columbia River Gorge in Washington; southern British Columbia to California.
Habitat: Coastal bluffs, lowland prairies, and balds at low elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: Annual
White plectritis (Plectritis macrocera)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Vernally moist, open areas; common in shrub-steppe
Origin: Native
Flowers: March-June
Growth Duration: Annual
American plum (Prunus americana)
Distribution: Occurring east of the Cascades crest in southcentral and southeastern Washington; Washington to Oregon, east to the Rocky Mountains, and further east across North America to the Atlantic Coast.
Habitat: Along watercourses, and on open or wooded, moist or dry areas from the plains into the lower mountains.
Origin: Native and introduced from further east of Washington
Flowers: April-May
Growth Duration: Perennial
Cherry plum (Prunus cerasifera)
Distribution: Occurring chiefly west of the Cascades crest and in the Columbia River Gorge in Washington, but also in southeastern Washington; British Columbia to California, east to Idaho; also in northeastern North America.
Habitat: Open, disturbed areas typically at low elevations.
Origin: Introduced
Flowers: March-April
Growth Duration: Perennial
Cultivated plum (Prunus domestica)
Distribution: Occurring chiefly west of the Cascades crest in Washington; Washington to California, east to Idaho and Utah; in scattered locations of central and northeastern U.S.
Habitat: Fields, roadsides, forest openings, abandoned homesteads, and other disturbed areas.
Origin: Introduced from Eurasia
Flowers: March-May
Growth Duration: Perennial
Indian plum (Oemleria cerasiformis)
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California.
Habitat: Moist to dry, open forest, forest edge, and stream bank thickets at low elevation.
Origin: Native
Flowers: February-April
Growth Duration: Perennial
Wild plum (Prunus americana)
Distribution: Occurring east of the Cascades crest in southcentral and southeastern Washington; Washington to Oregon, east to the Rocky Mountains, and further east across North America to the Atlantic Coast.
Habitat: Along watercourses, and on open or wooded, moist or dry areas from the plains into the lower mountains.
Origin: Native and introduced from further east of Washington
Flowers: April-May
Growth Duration: Perennial
Italian plumeless thistle (Carduus pycnocephalus)
Distribution: Occurring west of the Cascades crest in Washington, where known only from Clallam County; Washington to California and Idaho, also in central and eastern U.S.
Habitat: Disturbed, open areas at low elevation.
Origin: Introduced from Europe
Flowers: June-July
Growth Duration: Annual
Podfern (Aspidotis densa)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Idaho and Montana.
Habitat: Cliff crevices and moist, rocky slopes, foothills to near timberline, often on serpentine
Origin: Native
Growth Duration: Perennial
Fish poison (Croton setigerus)
Distribution: Occurring east of the Cascades crest in Washington; Washington to Baja California, east to western Idaho and Nevada.
Habitat: Dry, often sandy or rocky areas.
Origin: Native
Flowers: June-August
Growth Duration: Annual
Poison hemlock (Conium maculatum)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout North America.
Habitat: Roadsides, fields, wastelots, and other disturbed open areas, often where soil is moist.
Origin: Introduced from Europe
Flowers: April-August
Growth Duration: Biennial
Western poison ivy (Toxicodendron radicans)
Distribution: Occurring east of the Cascades crest in Washington; occurring throughout much of North America, except Alaska, California, southeastern U.S. and northeastern Canada.
Habitat: Generally in the lowlands and foothills and into the lower mountains in open areas or forest edges.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
Pacific poison-oak (Toxicodendron diversilobum)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east to Nevada.
Habitat: Open woods at low elevations.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
Pokeberry (Phytolacca americana)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Roadsides, pastures, clearings, wastelots, and other disturbed areas.
Origin: Introduced
Flowers: June-August
Growth Duration: Perennial
Pokeweed (Phytolacca americana)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east across most of North America to the Atlantic Coast.
Habitat: Roadsides, pastures, clearings, wastelots, and other disturbed areas.
Origin: Introduced
Flowers: June-August
Growth Duration: Perennial
Annual polemonium (Polemonium micranthum)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Common is open plains and foothills, often with sagebrush.
Origin: Native
Flowers: March-May
Growth Duration: Annual
Elegant polemonium (Polemonium elegans)
Distribution: Occurring in the Olympics and Cascades mountains in Washington; British Columbia to Washington.
Habitat: Open, often rocky areas, middle to high elevations in the mountains.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Great polemonium (Polemonium carneum)
Distribution: Olympic and Grays Harbor region of Washington, and Skamania County in Washington south through the Cascades to the Klamath region of Oregon and adjacent California.
Habitat: Thickets, woodlands and forest openings, from near sea level to moderate elevations in the mountains.
Origin: Native
Flowers: May - July
Growth Duration: Perennial
Salmon polemonium (Polemonium carneum)
Distribution: Olympic and Grays Harbor region of Washington, and Skamania County in Washington south through the Cascades to the Klamath region of Oregon and adjacent California.
Habitat: Thickets, woodlands and forest openings, from near sea level to moderate elevations in the mountains.
Origin: Native
Flowers: May - July
Growth Duration: Perennial
Showy polemonium (Polemonium pulcherrimum)
Distribution: Widely distributed in Washington; Alaska south to the Sierra Nevada of California, east to Wyoming.
Habitat: High elevations in the mountains, often in open areas above timberline.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Sticky polemonium (Polemonium viscosum)
Distribution: Know only from Okanogan County, Washington in Washington; British Columbia south to Oregon and Nevada, east to the Rocky Mountains.
Habitat: Open rocky places at high elevations in the mountains, commonly above timberline.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Washington polemonium (Polemonium pectinatum)
Distribution: Occurring east of the Cascades crest, where endemic to central and eastern Washington.
Habitat: Moist bottom lands.
Origin: Native
Flowers: May-June
Growth Duration: Perennial
Western polemonium (Polemonium occidentale)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to Montana and Colorado.
Habitat: Very wet places at mid-elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Coast polypody (Polypodium scouleri)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south along the coast to California.
Habitat: Cliffs and rocky outcroppings along the coast.
Origin: Native
Growth Duration: Perennial
Irregular polypody (Polypodium amorphum)
Distribution: Occurring on both sides of the Cascades crest in Washington; southern British Columbia to northern Oregon.
Habitat: Cliff crevices, mostly montane to subalpine.
Origin: Native
Growth Duration: Perennial
Leathery polypody (Polypodium scouleri)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south along the coast to California.
Habitat: Cliffs and rocky outcroppings along the coast.
Origin: Native
Growth Duration: Perennial
Scouler's polypody (Polypodium scouleri)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south along the coast to California.
Habitat: Cliffs and rocky outcroppings along the coast.
Origin: Native
Growth Duration: Perennial
Western polypody (Polypodium hesperium)
Distribution: Occurring chiefly east of the Cascades crest in Washington, but fairly common in the Cascades west of the crest; British Columbia to California, east to the Rocky Mountains.
Habitat: Moist cliffs, ledges and rock crevices, lowlands to middle elevations in the mountains
Origin: Native
Growth Duration: Perennial
Berchtold's pondweed (Potamogeton berchtoldii)
Origin: Native
Flowers: Late June - August
Growth Duration: Perennial
Blunt-leaved pondweed (Potamogeton obtusifolius)
Origin: Native
Growth Duration: Perennial
Broad-leaved pondweed (Potamogeton amplifolius)
Distribution: British Columbia to Newfoundland, south to California in the west and Alabama in the eastern United States, but absent from Nevada to Texas; common west of the Cascades in Washington
Habitat: Generally in fairly deep water
Origin: Native
Flowers: June - August
Growth Duration: Perennial
Clasping-leaved pondweed (Potamogeton richardsonii)
Distribution: Alaska to Maine, south to California and New Mexico in the west and Illimois in eastern United states; more common west of the Cascades in Washington
Habitat: Standing or slow-moving water
Origin: Native
Flowers: June - August
Growth Duration: Perennial
Curly pondweed (Potamogeton crispus)
Distribution: Widely dsitributed on both sides of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Slow-moving rivers and streams, lakes, ponds, and backwater channels, generally at low elevations.
Origin: Introduced from Eurasia
Flowers: June-August
Growth Duration: Perennial
Eel-grass pondweed (Potamogeton zosteriformis)
Distribution: British Columbia south on both sides of the Cascades to California, east to Idaho and Montana, and much of north central and northeast United States and adjacent Canada.
Habitat: Lakes, ponds and streams.
Origin: Native
Flowers: July - August
Growth Duration: Perennial
Fennel-leaved pondweed (Stuckenia pectinata)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Shallow, fresh to brackish water.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Fern pondweed (Potamogeton robbinsii)
Distribution: Alaska to California, east to Montana and Colorado; Minnesota to Maine, south to Virginia in eastern United States
Habitat: Quiet water, mostly in lakes
Origin: Native
Flowers: August - September
Growth Duration: Perennial
Fibrous-stipuled pondweed (Potamogeton fibrillosus)
Origin: Native
Flowers: June - August
Growth Duration: Perennial
Flat-stalked pondweed (Potamogeton friesii)
Origin: Native
Flowers: July - August
Growth Duration: Perennial
Flat-stem pondweed (Potamogeton zosteriformis)
Distribution: British Columbia south on both sides of the Cascades to California, east to Idaho and Montana, and much of north central and northeast United States and adjacent Canada.
Habitat: Lakes, ponds and streams.
Origin: Native
Flowers: July - August
Growth Duration: Perennial
Floating pondweed (Potamogeton natans)
Distribution: Alaska south on both sides of the Cascades to California, east to Arizona and northeast United States.
Habitat: In rather shallow, standing water, often where brackish.
Origin: Native
Flowers: May - August
Growth Duration: Perennial
Floating-leaved pondweed (Potamogeton natans)
Distribution: Alaska south on both sides of the Cascades to California, east to Arizona and northeast United States.
Habitat: In rather shallow, standing water, often where brackish.
Origin: Native
Flowers: May - August
Growth Duration: Perennial
Grassy pondweed (Potamogeton gramineus)
Distribution: Alaska to Maine, south to California and New Mexico in the west and West Virginia in eastern United states
Habitat: Standing or running water
Origin: Native
Flowers: June - August
Growth Duration: Perennial
Horned pondweed (Zannichellia palustris)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Fresh to brackish, standing to slow-flowing water, sea level to moderate elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Illinois pondweed (Potamogeton illinoensis)
Distribution: Occurring on both sides of the Cascades crest in Washington; Northwest Territories south to California, east across North America in scattered locations to the Atlantic Coast.
Habitat: Ponds and lakes, usually in rather deep, quiet water.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Large-leaved pondweed (Potamogeton amplifolius)
Distribution: British Columbia to Newfoundland, south to California in the west and Alabama in the eastern United States, but absent from Nevada to Texas; common west of the Cascades in Washington
Habitat: Generally in fairly deep water
Origin: Native
Flowers: June - August
Growth Duration: Perennial
Leafy pondweed (Potamogeton foliosus)
Distribution: British Columbia to Newfoundland, south on both sides of the Cascades to Mexico.
Habitat: Standing to moving, shallow water.
Origin: Native
Flowers: Late June - August
Growth Duration: Perennial
Loddon's pondweed (Potamogeton nodosus)
Distribution: British Columbia south on both sides of the Cascades to Mexico; east over most of the United States.
Habitat: Shallow to rather deep water.
Origin: Native
Flowers: June - August
Growth Duration: Perennial
Long-leaved pondweed (Potamogeton nodosus)
Distribution: British Columbia south on both sides of the Cascades to Mexico; east over most of the United States.
Habitat: Shallow to rather deep water.
Origin: Native
Flowers: June - August
Growth Duration: Perennial
Narrowleaf pondweed (Potamogeton strictifolius)
Origin: Native
Northern pondweed (Potamogeton alpinus)
Origin: Native
Flowers: June - August
Growth Duration: Perennial
Reddish pondweed (Potamogeton alpinus)
Origin: Native
Flowers: June - August
Growth Duration: Perennial
Ribbon-leaved pondweed (Potamogeton epihydrus)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, scattered eastward to the Rocky Mountains, Great Lakes region, and northeastern North America.
Habitat: Shallow to deep water in ponds and lakes.
Origin: Native
Flowers: June July
Growth Duration: Perennial
Richardson's pondweed (Potamogeton richardsonii)
Distribution: Alaska to Maine, south to California and New Mexico in the west and Illimois in eastern United states; more common west of the Cascades in Washington
Habitat: Standing or slow-moving water
Origin: Native
Flowers: June - August
Growth Duration: Perennial
Robbin's pondweed (Potamogeton robbinsii)
Distribution: Alaska to California, east to Montana and Colorado; Minnesota to Maine, south to Virginia in eastern United States
Habitat: Quiet water, mostly in lakes
Origin: Native
Flowers: August - September
Growth Duration: Perennial
Sago pondweed (Stuckenia pectinata)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Shallow, fresh to brackish water.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Slender-leaved pondweed (Stuckenia filiformis)
Distribution: Only known from Whatcom County in Washington; Alaska south to California, east to the Rocky Mountains; east across Canada to the Atlantic Coast and Greenland.
Habitat: Lakes, ponds, slow moving waters.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Small pondweed (Potamogeton pusillus)
Distribution: British Columbia south on both sides of the Cascades to California, east to the Atlantic.
Habitat: Shallow ponds and streams.
Origin: Native
Flowers: July - August
Growth Duration: Perennial
Variable pondweed (Potamogeton gramineus)
Distribution: Alaska to Maine, south to California and New Mexico in the west and West Virginia in eastern United states
Habitat: Standing or running water
Origin: Native
Flowers: June - August
Growth Duration: Perennial
Western pondweed (Stuckenia filiformis)
Distribution: Only known from Whatcom County in Washington; Alaska south to California, east to the Rocky Mountains; east across Canada to the Atlantic Coast and Greenland.
Habitat: Lakes, ponds, slow moving waters.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
White-stalked pondweed (Potamogeton praelongus)
Distribution: Alaska south on both sides of the Cascades to California, east through Canada to Newfoundland, south to New York and Indiana.
Habitat: In the Pacific Northwest, mostly in deep water of lakes.
Origin: Native
Flowers: May - July
Growth Duration: Perennial
Whitestem pondweed (Potamogeton praelongus)
Distribution: Alaska south on both sides of the Cascades to California, east through Canada to Newfoundland, south to New York and Indiana.
Habitat: In the Pacific Northwest, mostly in deep water of lakes.
Origin: Native
Flowers: May - July
Growth Duration: Perennial
Alkali popcorn-flower (Plagiobothrys leptocladus)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington to Baja California, east to the Rocky Mountains and northern Great Plains.
Habitat: Moist clay flats and beds of drying pools; tolerant of alkali.
Origin: Native
Flowers: April-July
Growth Duration: Annual
Cognate popcorn-flower (Plagiobothrys cognatus)
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to the Rocky Mountains.
Habitat: Wet areas in grasslands, sagebrush, and forest openings.
Origin: Native
Flowers: April-July
Growth Duration: Annual
Fragrant popcorn-flower (Plagiobothrys figuratus)
Distribution: Occurring chiefly west of the Cascades and in the Columbia River Gorge in Washington; British Columbia to Oregon.
Habitat: Nonalkaline meadows, low ground, and moist fields.
Origin: Native
Flowers: May-July
Growth Duration: Annual
Harsh popcorn-flower (Plagiobothrys hispidulus)
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to Wyoming, Utah, and Nevada.
Habitat: Moist to dry open areas at low to middle elevations.
Origin: Native
Flowers: May-July
Growth Duration: Annual
Matted popcorn-flower (Plagiobothrys cusickii)
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to Idaho and Nevada.
Habitat: Wet areas and mudflats in sagebrush, grassland, and forest openings.
Origin: Native
Flowers: May-July
Growth Duration: Annual
Pacific popcorn-flower (Plagiobothrys tenellus)
Distribution: Occurring chiefly east of the Cascades crest in Washington; southern British Columbia to Baja California, east to Idaho and Nevada.
Habitat: Dry, open places at low elevations.
Origin: Native
Flowers: April-June
Growth Duration: Annual
Rusty popcorn-flower (Plagiobothrys nothofulvus)
Distribution: Common in the east end of the Columbia River Gorge in Washington; Oregon to northern Baja California, east to Nevada.
Habitat: Open slopes, fields and roadsides.
Origin: Native
Flowers: March-May
Growth Duration: Annual
Slender popcorn-flower (Plagiobothrys tenellus)
Distribution: Occurring chiefly east of the Cascades crest in Washington; southern British Columbia to Baja California, east to Idaho and Nevada.
Habitat: Dry, open places at low elevations.
Origin: Native
Flowers: April-June
Growth Duration: Annual
Slender-branched popcorn-flower (Plagiobothrys leptocladus)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington to Baja California, east to the Rocky Mountains and northern Great Plains.
Habitat: Moist clay flats and beds of drying pools; tolerant of alkali.
Origin: Native
Flowers: April-July
Growth Duration: Annual
Gray poplar (Populus ×canescens)
Origin: Introduced from Europe
Growth Duration: Perennial
Lombardy poplar (Populus nigra)
Origin: Introduced
Growth Duration: Perennial
White poplar (Populus alba)
Distribution: Distributed on both sides of the Cascades in Washington; widely distributed throughout North America.
Habitat: Disturbed areas often associated with urban and suburban areas, riparian zones.
Origin: Introduced from Europe
Flowers: March-May
Growth Duration: Perennial
California poppy (Eschscholzia californica)
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; British Columbia to California, east to Idaho, Arizona and New Mexico.
Habitat: Roadsides, fields, ditches, balds, prairies, parks, wastelots, and other disturbed, open areas at low elevations.
Origin: Introduced from Oregon
Flowers: May-September
Growth Duration: Annual, Perennial
Corn poppy (Papaver rhoeas)
Distribution: Widely introduced and often escaping in scattered locations in the Pacific Northwest.
Habitat: Disturbed ground, old fields.
Origin: Introduced from Europe
Flowers: June - July
Growth Duration: Annual
Long prickly-head poppy (Papaver argemone)
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; occurring occurring in scattered locations across North America.
Habitat: Disturbed areas at low elevations, where escaping from cultivation.
Origin: Introduced from Europe
Flowers: May-June
Growth Duration: Annual
Long-headed poppy (Papaver dubium)
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; occurring in scattered locations across North America, where escaping from cultivation.
Habitat: Fields, dunes, marshy areas, roadsides, disturbed sites.
Origin: Introduced
Flowers: May-July
Growth Duration: Annual
Opium poppy (Papaver somniferum)
Distribution: Introduced and often escaping from cultivation, persisting for a short time.
Habitat: Waste areas, roadsides.
Origin: Introduced from Eurasia
Flowers: June - July
Growth Duration: Annual
Poque (Kopsiopsis hookeri)
Distribution: Occurring west of the Cascades crest along the Puget Sound and outer coast in Washington; British Columbia to California.
Habitat: Myco-heterotrophic on Gaultheria shallon, which occurs primarily in forest understories, along forest edges, and in forest and meadow openings at low to moderate elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Duck potato (Sagittaria latifolia)
Distribution: Occurring on both sides of the Cascades in Washington; Vancouver Island, British Columbia south to central California; primary distribution in central and eastern North America.
Habitat: Ditches, ponds, lakes, swampy areas.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Irish potato (Solanum tuberosum)
Origin: Introduced from Europe
Growth Duration: Perennial
Nuttall's povertyweed (Blitum nuttallianum)
Distribution: East of the Cascades, southern British Columbia south to southern California, east to Manitoba, Missouri and New Mexico.
Habitat: Dry to moist, saline or alkaline soil, from the desert plains to mid-elevations in he mountains.
Origin: Native
Flowers: May - July
Growth Duration: Annual
Red povertyweed (Micromonolepis pusilla)
Distribution: Occurring in central Washington; disjunct in central Washington, otherwise from southern Oregon to California, Nevada, Utah, Wyoming, and Colorado.
Habitat: Sagebrush-steppe desert, often where alkaline.
Origin: Native
Flowers: May-June
Bulbiferous prairie star (Lithophragma glabrum)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Grasslands and sagebrush desert to ponderosa pine and Douglas-fir forest openings.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Slender prairie star (Lithophragma tenellum)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Sagebrush desert and ponderosa pine forests openings.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Small-flower prairie star (Lithophragma parviflorum)
Distribution: Widely distributed on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and Great Plains.
Habitat: Prairies, balds, sagebrush desert, and forest openings, sea level to mid-elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Blue Mountain prairie-clover (Dalea ornata)
Distribution: Occurring east of the Cascades crest in central and southeastern Washington\' Washington to California, east to Idaho and Nevada.
Habitat: Dry, rocky or sandy areas, often in sagebrush, low to moderate elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Prairie-crocus (Anemone patens)
Distribution: Occurring east of the Cascades crest in the Wenatchee Mountains in Washington, where disjunct; 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
Growth Duration: Perennial
Foxtail pricklegrass (Crypsis alopecuroides)
Distribution: Occurring in the south-central areas of Washington;
Habitat: Sandy soils around drying lake margins and other seasonally moist, disturbed, open areas.
Origin: Introduced from n. Africa and Eurasia
Flowers: April-July
Growth Duration: Annual
Modest pricklegrass (Crypsis vaginiflora)
Origin: Introduced from the western Mediterranean
Brittle prickly-pear (Opuntia fragilis)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east the Rocky Mountains, Great Plains, and Great Lakes region.
Habitat: Dry, open, often sandy soil.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Columbia prickly-pear (Opuntia columbiana)
Distribution: Occurring east of the Cascades crest in Washington; south-central British Columbia to eastern Oregon, east to western and southern Idaho.
Habitat: From sagebrush plains and foothills to lower elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Little prickly-pear (Opuntia fragilis)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California, east the Rocky Mountains, Great Plains, and Great Lakes region.
Habitat: Dry, open, often sandy soil.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Common evening primrose (Oenothera biennis)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: Meadows and stream banks, from the plains to the lower mountains, typically where disturbed.
Origin: Introduced from Europe
Flowers: June-August
Growth Duration: Biennial
Hooker's evening primrose (Oenothera elata)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington south to California, east to the Rocky Mountains and southern Great Plains in the U.S.
Habitat: Sagebrush hills to mid elevations in the mountains, generally where moist.
Origin: Native
Flowers: June-September
Growth Duration: Biennial, Perennial
Long-tubed evening primrose (Oenothera flava)
Distribution: Known historically in Washington from south-central part of the state; Saskatchewan to Mexico, west to Idaho and California.
Habitat: Hard-packed soil in swales or around vernal pools in the plains and lower foothills.
Origin: Native
Flowers: July-August
Growth Duration: Perennial
Small-flowered evening primrose (Eremothera minor)
Distribution: East of the Cascades in Washington; Washington south to California, east to Montana and Colorado.
Habitat: Sagebrush desert, often where vernally moist
Origin: Native
Flowers: April-June
Growth Duration: Annual
Water primrose (Ludwigia hexapetala)
Distribution: Scattered locations throughout Washington; along Columbia River near Portland, OR, introduced in much of North America.
Habitat: Swamps, lakes, and streams.
Origin: Introduced from South America
Flowers: June-August
Growth Duration: Perennial
Floating primrose-willow (Ludwigia peploides)
Distribution: Documented west of the Cascades crest in King County in Washington; central Oregon to California, east across the southwestern U.S. and southern Great Plains to eastern North America.
Habitat: Noxious; ponds, slow streams, and sloughs.
Origin: Introduced
Flowers: June-September
Growth Duration: Perennial
Marsh primrose-willow (Ludwigia palustris)
Distribution: Occurring west of the Cascades crest and along the Columbia River in Washington; southern British Columbia to California, east to Idaho, east across the southwestern U.S. and southern Great Plains to eastern North America; also occurring in New World Tropics and Eurasia.
Habitat: Lakes, marshes, peatlands, shores, and wet meadows.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Little prince's-pine (Chimaphila menziesii)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Montana and Utah.
Habitat: Coniferous forests from low to middle elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Prince's-pine (Chimaphila umbellata)
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, northern Great Plains, Great Lakes region, and eastern North America.
Habitat: Wooded areas, mostly coniferous forest, low to middle elevations in the mountains.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Princess tree (Paulownia tomentosa)
Distribution: Known from King and Skamania counties in Washington; occurring from the Great Lakes region south to Texas, east to the Atlantic Coast.
Habitat: Disturbed, open areas often relatively close to sites where trees are being cultivated.
Origin: Introduced
Flowers: May-June
Growth Duration: Perennial
California privet (Ligustrum ovalifolium)
Origin: Introduced
Common privet (Ligustrum vulgare)
Distribution: Occurring west of the Cascades in Washington; British Columbia south to Texas, east to the Atlantic Coast
Habitat: At low elevations in forest understory, forest and prairie edges, and disturbed areas.
Origin: Introduced
Flowers: April-May
Growth Duration: Perennial
Professor-weed (Galega officinalis)
Distribution: Occurring west of the Cascades crest in Washington; occurring in scattered locations throughout North America, though not along the southern border.
Habitat: Disturbed areas including wastelots, roadsides, and fields; noxious.
Origin: Introduced from Eurasia
Flowers: May-July
Growth Duration: Perennial
Columbian puccoon (Lithospermum ruderale)
Distribution: Occurring east of the Cascades crest in Washington; southern British Columbia to California, east to the Sasketchewan and the Rocky Mountains.
Habitat: Sagebrush desert to ponderosa pine forest openings, from low to middle elevations in the mountains.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Puddingberry (Cornus canadensis)
Distribution: Occurring east of the Cascades crest in northeastern Washington; northeastern Washington to the Great Lakes region and northeastern North America; Greenland.
Habitat: Moist forest understory.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Treelike puncturebract (Oxytheca dendroidea)
Origin: Native
Flowers: June - August
Long purples (Lythrum salicaria)
Distribution: Widely distributed throughout Washington; widely distributed throughout North America.
Habitat: Noxious weed of standing water and wet ground.
Origin: Introduced from Europe
Flowers: July-September
Growth Duration: Perennial
Common purslane (Portulaca oleracea)
Distribution: Introduced from southern Europe and widely distributed in the United States.
Habitat: Gardens, disturbed soil
Origin: Introduced from Europe
Flowers: June - Frost
Growth Duration: Annual
Sea purslane (Honckenya peploides)
Distribution: Occuring west of the Cascades crest in the coastal counties in Washington; Alaska to northern Oregon, east across Canada to coastal northeastern North America; Greenland and arctic Eurasia.
Habitat: Coastal beaches, strands, and sand dunes.
Origin: Native
Flowers: May-September
Growth Duration: Perennial
Pussypaws (Calyptridium umbellatum)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to Baja California, east to Montana, Wyoming and Utah.
Habitat: Ponderosa pine woods, to subalpine sandy flats and knolls, to the alpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Rosy pussypaws (Calyptridium roseum)
Distribution: Occurring east of the Cascades crest in Benton County, Washington, where disjunct from the main range of the species; central Oregon to California, east to southern Idaho and Utah; disjunct in south-central Washington.
Habitat: Sagebrush desert to montane forest openings.
Origin: Native
Flowers: May-July
Growth Duration: Annual
Alpine pussytoes (Antennaria alpina)
Distribution: Occurring in the North Cascades Mountains in Washington; Alaska to Washington, Montana, and Wyoming, east across Canada; circumboreal.
Habitat: Alpine meadows.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Alpine pussytoes (Antennaria media)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains; circumboreal
Habitat: On rocky slopes and ridges, and in talus and pumice, from subalpine to alpine meadows.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Brown-bract pussytoes (Antennaria umbrinella)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Saskatchewan, Montana, Wyoming, and Colorado.
Habitat: Forest openings at middle elevations to subalpine meadows.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Cushion pussytoes (Antennaria dimorpha)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and Nebraska.
Habitat: Dry, open places in sagebrush desert to ponderosa pine forest openings, often on lithosol.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
Flat topped pussytoes (Antennaria corymbosa)
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to the Rocky Mountains.
Habitat: Streamsides, willow thickets and moist meadows in subalpine and alpine areas.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Geyer's pussytoes (Antennaria geyeri)
Distribution: Occurring east of the Cascades crest in southern Washington; southern Washington to California, east to Nevada.
Habitat: Rocky slopes with ash, sand, or pumice soils, lithosols, and open forest.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Hooker's pussytoes (Antennaria racemosa)
Distribution: Widely distributed in mountainous areas on both sides of the Cascades crest in Washington; British Columbia to California, east to Alberta, Montana, and Wyoming.
Habitat: Dry to damp rocky slopes, forest openings, and ledges from low to elevations to the alpine.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Howell's pussytoes (Antennaria howellii)
Distribution: Occurring on both sides of the Cascades crest in Washington; Yukon Territory to California, east to the Rocky Mountains, northern Great Plains, Great Lakes region, and northeastern North America.
Habitat: Rocky or sandy slopes, dry to moist grasslands, and forest openings at low to middle elevations.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Little-leaf pussytoes (Antennaria microphylla)
Distribution: Occurring on both sides of the Cascades crest in Washington, but more common east of the crest; Alaska to California, east to the Rocky Mountains and northern Great Plains, Great Lakes region, and eastern Canada.
Habitat: Dry to moist habitats, including meadows, ponderosa pine forest openings, rocky slopes, and floodplains from the lowlands to the alpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Little-leaf pussytoes (Antennaria parvifolia)
Distribution: Occurring east of the Cascades crest in northeastern Washington; British Columbia to Oregon, east to the Rocky Mountains, Great Plains, and Great Lakes region.
Habitat: Meadows, open forest, gravelly slopes, and sandy flats from the lowlands middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Low pussytoes (Antennaria dimorpha)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and Nebraska.
Habitat: Dry, open places in sagebrush desert to ponderosa pine forest openings, often on lithosol.
Origin: Native
Flowers: April-May
Growth Duration: Perennial
Meadow pussytoes (Antennaria corymbosa)
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to the Rocky Mountains.
Habitat: Streamsides, willow thickets and moist meadows in subalpine and alpine areas.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Narrowleaved pussytoes (Antennaria stenophylla)
Distribution: Occurring east of the Cascades crest in Washington; Washington to Nevada, east to central Idaho.
Habitat: Rocky slopes, flats, lithosol areas, and dry grasslands in sagebrush desert.
Origin: Native
Flowers: April-June
Growth Duration: Perennial
Nuttall's pussytoes (Antennaria parvifolia)
Distribution: Occurring east of the Cascades crest in northeastern Washington; British Columbia to Oregon, east to the Rocky Mountains, Great Plains, and Great Lakes region.
Habitat: Meadows, open forest, gravelly slopes, and sandy flats from the lowlands middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Pinewoods pussytoes (Antennaria geyeri)
Distribution: Occurring east of the Cascades crest in southern Washington; southern Washington to California, east to Nevada.
Habitat: Rocky slopes with ash, sand, or pumice soils, lithosols, and open forest.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Pygmy pussytoes (Antennaria monocephala)
Distribution: Reported from the North Cascades in Washington; Alaska to British Columbia, east to Alberta, Montana, and Wyoming; also in the Russian Far East.
Habitat: Alpine meadows, ridges, and rocky outcroppings.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Raceme pussytoes (Antennaria racemosa)
Distribution: Widely distributed in mountainous areas on both sides of the Cascades crest in Washington; British Columbia to California, east to Alberta, Montana, and Wyoming.
Habitat: Dry to damp rocky slopes, forest openings, and ledges from low to elevations to the alpine.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Rocky Mountain pussytoes (Antennaria media)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains; circumboreal
Habitat: On rocky slopes and ridges, and in talus and pumice, from subalpine to alpine meadows.
Origin: Native
Flowers: June-September
Growth Duration: Perennial
Rosy pussytoes (Antennaria microphylla)
Distribution: Occurring on both sides of the Cascades crest in Washington, but more common east of the crest; Alaska to California, east to the Rocky Mountains and northern Great Plains, Great Lakes region, and eastern Canada.
Habitat: Dry to moist habitats, including meadows, ponderosa pine forest openings, rocky slopes, and floodplains from the lowlands to the alpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Showy pussytoes (Antennaria pulcherrima)
Distribution: Occurring east of the Cascades crest in Washington; Alaska to Washington, east to the Rocky Mountains, east across Canada to the Atlantic Coast.
Habitat: Streams, wet thickets and meadows, and peatlands from middle elevations to the alpine.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Silvery-brown pussytoes (Antennaria luzuloides)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and South Dakota.
Habitat: Sagebrush grasslands at low elevations to dry, rocky slopes at middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Single-headed pussytoes (Antennaria monocephala)
Distribution: Reported from the North Cascades in Washington; Alaska to British Columbia, east to Alberta, Montana, and Wyoming; also in the Russian Far East.
Habitat: Alpine meadows, ridges, and rocky outcroppings.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Stoloniferous pussytoes (Antennaria flagellaris)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Idaho, Wyoming, South Dakota, and Nevada.
Habitat: Sagebrush desert to dry, open areas at middle elevations, often in lithosol.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
Tall pussytoes (Antennaria anaphaloides)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia, including southern Vancouver Island, to Oregon, east to Sasketchewan, Montana, Colorado, and Nevada.
Habitat: Grassy hillsides, open woodlands, and ponderosa pine forest openings from the foothills to middle elevations in the mountains.
Origin: Native
Flowers: June-July
Growth Duration: Perennial
Umber pussytoes (Antennaria umbrinella)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Saskatchewan, Montana, Wyoming, and Colorado.
Habitat: Forest openings at middle elevations to subalpine meadows.
Origin: Native
Flowers: May-August
Growth Duration: Perennial
Whip pussytoes (Antennaria flagellaris)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Idaho, Wyoming, South Dakota, and Nevada.
Habitat: Sagebrush desert to dry, open areas at middle elevations, often in lithosol.
Origin: Native
Flowers: April-July
Growth Duration: Perennial
White pussytoes (Antennaria microphylla)
Distribution: Occurring on both sides of the Cascades crest in Washington, but more common east of the crest; Alaska to California, east to the Rocky Mountains and northern Great Plains, Great Lakes region, and eastern Canada.
Habitat: Dry to moist habitats, including meadows, ponderosa pine forest openings, rocky slopes, and floodplains from the lowlands to the alpine.
Origin: Native
Flowers: June-August
Growth Duration: Perennial
Woodrush pussytoes (Antennaria luzuloides)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and South Dakota.
Habitat: Sagebrush grasslands at low elevations to dry, rocky slopes at middle elevations in the mountains.
Origin: Native
Flowers: May-July
Growth Duration: Perennial
Woolly pussytoes (Antennaria lanata)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Alberta, Wyoming, and Utah.
Habitat: Dry or moist subalpine to alpine meadows, rocky slopes, and ridges.
Origin: Native
Flowers: July-September
Growth Duration: Perennial
Pygmyflower (Androsace septentrionalis)
Distribution: Occurring east of the Cascades crest in north-central Washington; Alaska to California, east to the Great Plains, Great Lakes regiona, and eastern Canada.
Habitat: Alpine meadows.
Origin: Native
Flowers: May-August
Growth Duration: Annual
Spreading pygmyleaf (Loeflingia squarrosa)
Distribution: Occurring east of the Cascades crest in Washington, where disjunct in Benton County. southeastern Oregon to California, east to the southern Rocky Mountains and southern Great Plains.
Habitat: Dry, sandy, or gravelly desert areas.
Origin: Native
Flowers: May-June
Growth Duration: Annual
Wrinkle-seed pygmyweed (Crassula aquatica)
Distribution: Occurring in scattered localities across Washington; Alaska south to California, east to the Rocky Mountains, and in the southeastern and northeastern regions of North America.
Habitat: Mud flats and vernal pools.
Origin: Native
Flowers: April-August
Growth Duration: Annual
One-sided pyrola (Orthilia secunda)
Distribution: Alaska to California, east to New Mexico in the west, and across the northern half of the United States to the Atlantic
Habitat: Common in coniferous woods at moderate to mid-elevationn in the mountains
Origin: Native
Flowers: June - August
Growth Duration: Perennial
Toothleaf pyrola (Pyrola dentata)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Montana and Wyoming.
Habitat: Montane coniferous forest understory.
Origin: Native
Flowers: June-August
Growth Duration: Perennial