Includes all flowering plants, conifers, ferns and fern-allies.
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378 common names
Show only taxa with photos
Index to common names:
Pacific,
paint,
paintbrush,
paiuteweed,
pampas grass,
panicgrass,
panicum,
pansy,
parnassus,
parsely,
parsley,
parsley-piert,
parsnip,
partridgefoot,
pasqueflower,
pathfinder,
pea,
peach,
pear,
pearleaf,
pearlflower,
pearlwort,
peas,
peashrub,
peavine,
pectocarya,
pellitory,
pellitory-of-the-wall,
penny,
pennycress,
pennyroyal,
penstemon,
peony,
pepper,
peppergrass,
peppermint,
pepperweed,
pepperwort,
periwinkle,
phacelia,
pheasant's-eye,
phlox,
pickelweed,
Pickerel-weed,
pickleweed,
pigeonberry,
piggyback-plant,
pigweed,
pillwort,
pimpernel,
pincushion,
pincushion-plant,
pine,
pinedrops,
pinefoot,
pinegrass,
pinesap,
pink,
pinkfairies,
pint,
pitchfork,
plagiobothrys,
plainsmustard,
plane-tree,
plant,
plantain,
plectritis,
plum,
plumeless thistle,
podfern,
poison,
poison ivy,
poison-hemlock,
poison-oak,
pokeberry,
pokeweed,
polemonium,
polypody,
pondweed,
poplar,
poppy,
poque,
potato,
povertyweed,
prairie coneflower,
prairie-clover,
prairie-crocus,
pricklegrass,
prickly-pear,
primrose,
primrose-willow,
prince's-pine,
princess tree,
princess-feather,
privet,
professor-weed,
puccoon,
puddingberry,
puffs,
puncturebract,
purples,
purslane,
pussypaws,
pussytoes,
pygmyflower,
pygmyleaf,
pygmyweed,
pyrola
(Rubus ursinus)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia south to California, east to Idaho.
Habitat: Open to fairly dense woodlands, sea level to mid-elevations in the mountains; common in logged areas.
Origin: Native
Flowers: April-August
(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
(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
(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
(Castilleja chambersii)
Distribution: Known only from Pacific County in Washington; Pacific County, WA south to Clatsop County, OR.
Habitat: Forest openings, embankments, and rock outcroppings typically where moist.
Origin: Native
Flowers: June-July
(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
(Castilleja litoralis)
Origin: Native
(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
(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
(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
(Hieracium aurantiacum)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east across southern Canada and northern U.S; widely distributed throughout eastern U.S.
Habitat: Moist sites from lowlands to mid-elevations in the mountains, typically where disturbed.
Origin: Introduced from Europe
Flowers: June-August
(Castilleja elmeri)
Distribution: Wenatchee Mountains and the east slope of the Cascades, Kittitas County, Washington; north into British Columbia.
Habitat: Moist, open slopes at mid-elevations in the mountains.
Origin: Native
Flowers: June-August
(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
(Castilleja hispida)
Distribution: Both sides of the Cascades, British Columbia to Oregon, east to Montana
Habitat: Grassy slopes and forest openings, from sea level to moderate elevations in the mountains
Origin: Native
Flowers: Late April - August
(Castilleja cryptantha)
Distribution: Endemic to Mt. Rainier National Park and immediate vicinity, Washington.
Habitat: Moist subalpine meadows.
Origin: Native
Flowers: July-August
(Castilleja litoralis)
Origin: Native
(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
(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
(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
(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
(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
(Castilleja victoriae)
Distribution: San Juan Islands in WA; Victoria, B.C.
Habitat: Seasonally moist balds.
Origin: Native
Flowers: May-June
(Castilleja lutescens)
Distribution: Eastern Washington; east to northwestern Montana and south through Idaho to northeastern Oregon.
Habitat: Low, dry grasslands and woodlands, occasionally to high elevations in the mountains.
Origin: Native
Flowers: May-August
(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
(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
(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
(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
(Panicum dichotomiflorum)
Distribution: Native in most of central and eastern United States; occasionally introduced in Washington.
Habitat: Waste ground.
Origin: Introduced
Flowers: May - September
(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
(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
(Petroselinum crispum)
Distribution: Occurring west of the Cascades crest in Washington at low elevations;
Origin: Introduced from Europe
(Lomatium dissectum)
Distribution: Chiefly west of the east base of the Cascades, British Columbia to California
Habitat: Open areas from the foothills to moderate elevations in the mountains
Origin: Native
Flowers: April - June
(Lomatium multifidum)
Distribution: East of the Cascades, British Columbia to Oregon, east to Wyoming
Habitat: Open, often rocky slopes and dry meadows, low to mid-elevations
Origin: Native
Flowers: April - June
(Lomatium utriculatum)
Distribution: West of the Cascades in Washington;British Columbia south to California.
Habitat: Low elevations; somewhat moist, open, often rocky areas.
Origin: Native
Flowers: April-June
(Aphanes arvensis)
Distribution: Southern British Columbia south east of the Cascades to California; common in eastern United States.
Habitat: Weed of open fields and wooded slopes.
Origin: Introduced
Flowers: April - May
(Aphanes occidentalis)
Origin: Native
(Aphanes australis)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to Washington, also in southeastern U.S.
Habitat: Disturbed, open areas at low elevations.
Origin: Introduced
Flowers: March-May
(Pastinaca sativa)
Distribution: Introduced and widely naturalized in North America; found in scattered locations in the Pacific Northwest.
Habitat: Roadsides, ditchbanks and other disturbed sites.
Origin: Introduced; native to Europe
Flowers: May - July
(Heracleum maximum)
Distribution: Widely distributed throughout Washington; occurring throughout North America except for southeastern and lower Midwest of U.S.
Habitat: Moist areas, low to mid-elevations.
Origin: Native
Flowers: June-August
(Lomatium nudicaule)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho and Utah.
Habitat: Dry, open areas; common in shrub-steppe, but found in mountain meadows.
Origin: Native
Flowers: April-June
(Sium suave)
Distribution: Southern British Columbia to central California, east to Newfoundland and Virginia.
Habitat: Swampy places and shallow water, in the valleys and foothills.
Origin: Native
Flowers: July - August
(Pastinaca sativa)
Distribution: Introduced and widely naturalized in North America; found in scattered locations in the Pacific Northwest.
Habitat: Roadsides, ditchbanks and other disturbed sites.
Origin: Introduced; native to Europe
Flowers: May - July
(Luetkea pectinata)
Distribution: Occurring in the Olympics and Cascades mountains in Washington; Alaska south to California, and in the Rocky Mountains.
Habitat: Usually on sandy soil in moist or shady places, subalpine to alpine.
Origin: Native
Flowers: June-August
(Anemone patens)
Distribution: East of the Cascades crest in Washington; Alaska south to the Wenatchee Mountains of Washington, east to the Rocky Mountains and northern Great Plains.
Habitat: Prairies to mountain slopes, mostly on well-drained soil.
Origin: Native
Flowers: May-August
(Anemone occidentalis)
Distribution: In the Olympic and the Cascade mountains in Washington; British Columbia south to California, east to Montana and the Wallowa Mountains of Oregon.
Habitat: Mountain slopes and meadows at mid- to high elevations.
Origin: Native
Flowers: May-August
(Adenocaulon bicolor)
Distribution: Both sides of the Cascades in Washington; British Columbia south to California, east through the Rockies to Wisconsin and Ontario.
Habitat: Moist, shady woods at low to mid-elevations.
Origin: Native
Flowers: June-September
(Lathyrus japonicus)
Distribution: Coastal in Washington; Alaska south to California; also along the Atlantic Coast.
Habitat: Sandy beaches, dunes, and headlands along the coast.
Origin: Native
Flowers: May-September
(Lathyrus ochroleucus)
Distribution: Occurring east of the Cascades crest along the northern border in Washington; Alaska south 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
(Lathyrus tuberosus)
Origin: Introduced
Flowers: May - July
(Pisum sativum)
Origin: Introduced
(Lathyrus sphaericus)
Origin: Introduced
Flowers: May - June
(Ladeania lanceolata)
Distribution: East of the Cascades in Washington, mostly in the central and southcentral areas of the state; Washington south to California, east to the central regions of Canada and the U.S.
Habitat: Sagebrush steppe habitat in dry areas, often where sandy.
Origin: Native
Flowers: May-June
(Lathyrus polyphyllus)
Distribution: Occurring west of the Cascades crest in lowland Washington, and east up the Columbia River Gorge; Washington south to California.
Habitat: Prairies and open areas of low mountains.
Origin: Native
Flowers: May-July
(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
(Lathyrus sylvestris)
Distribution: Occurring chiefly west of the Cascades in Washington.
Habitat: Roadsides and waste places at low elevations.
Origin: Introduced
Flowers: May-July
(Lathyrus torreyi)
Distribution: Occurring west of the Cascades crest in Washington; Washington south to California.
Habitat: Open prairies and clearings in the woods at low elevations.
Origin: Native
Flowers: May-July
(Prunus persica)
Origin: Introduced
(Pyrus calleryana)
Distribution: Occurring in scattered locations in lowland western Washington; occurring in eastern and southeastern U.S.
Habitat: Forest edges where previously disturbed.
Origin: Introduced
Flowers: April-May
(Opuntia columbiana)
Distribution: Occurring east of the Cascades in Washington; southern British Columbia south to eastern Oregon.
Habitat: Plains and foothills to the lower mountains.
Origin: Native
Flowers: May-June
(Pyrus communis)
Origin: Introduced
(Pyrus nivalis)
Origin: Introduced
(Leptarrhena pyrolifolia)
Distribution: Alaska to Oregon, east to Alberta and Montana; in the Olympics and Cascades of Washington
Habitat: Streambanks, seeps and wet meadows, mid- to high elevations in the mountains
Origin: Native
Flowers: June - August
(Heterocodon rariflorus)
Distribution: East of the Cascades in Washington; southern British Columbia south to California, east to Idaho and Nevada.
Habitat: Moist, open places in the foothills and valleys to moderate elevations in the mountains.
Origin: Native
Flowers: June-August
(Sagina saginoides)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska south 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 mid elevations to the alpine.
Origin: Native
Flowers: May-September.
(Sagina apetala)
Distribution: Occurring in the lowlands west of the Cascades crest in Washington; British Columbia south to California; Kansas.
Habitat: Waste ground.
Origin: Introduced from Europe
Flowers: May-June
(Sagina procumbens)
Distribution: Introduced west of the Cascades, British Columbia to California
Habitat: Moist areas, especially gardens
Origin: Introduced from Europe
Flowers: May - October
(Sagina maxima)
Distribution: Occurring in counties along the coast in Washington; distinctly coastal, Alaska south to Monterey County, California.
Habitat: Moist sand or rocks.
Origin: Native
Flowers: June-September
(Sagina decumbens)
Distribution: Chiefly west of the Cascades in Washington; British Columbia south to southern California.
Habitat: Moist soil at low elevations, but not typically coastal.
Origin: Native
Flowers: May-August
(Vicia cracca)
Distribution: Introduced and widely naturalized in eastern United States; occasional in the Rocky Mountains and westward.
Habitat: Waste land, roadsides.
Origin: Introduced
Flowers: May - July
(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
Flowers: April-June
(Lathyrus angulatus)
Origin: Introduced
(Lathyrus littoralis)
Distribution: Occurring in the coastal counties in Washington; British Columbia south to California.
Habitat: Sand dunes and sandy beaches.
Origin: Native
Flowers: May-July
(Lathyrus pauciflorus)
Distribution: Occurring chiefly east of the Cascades crest in Washington;, Washington, south to California, east to Idaho and Arizona.
Habitat: Shrub-steppe to Ponderosa pine and higher open forests.
Origin: Native
Flowers: April-June
(Lathyrus lanszwertii)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington south to California, east to Idaho and Utah.
Habitat: Sagebrush-ponderosa pine woodland to moderate elevations in the mountains.
Origin: Native
Flowers: May-June
(Lathyrus nevadensis)
Distribution: Occurring on both sides of the Cascades crest and in the southeast corner of the State; British Columbia south to California, east to Idaho.
Habitat: Open woods at moderate to mid-elevations.
Origin: Native
Flowers: May-July
(Lathyrus lanszwertii)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Washington south to California, east to Idaho and Utah.
Habitat: Sagebrush-ponderosa pine woodland to moderate elevations in the mountains.
Origin: Native
Flowers: May-June
(Pectocarya penicillata)
Distribution: East of the Cascades, 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
(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
(Parietaria officinalis)
Origin: Introduced from central and southern Europe
(Parietaria judiaca)
Origin: Introduced from Africa and Eurasia
(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
(Noccaea fendleri)
Distribution: Occurring in the mountains throughout Washington; British Columbia south to California, east to Montana and New Mexico.
Habitat: Common in open, rocky areas at mid-elevations in the mountains.
Origin: Native
Flowers: May-August
(Thlaspi arvense)
Distribution: Distributed widely throughout Washington; widely introduced throughout North America.
Habitat: Weed of waste ground, low to moderate elevations.
Origin: Introduced from Europe
Flowers: April-August
(Microthlaspi perfoliatum)
Distribution: Only found along eastern border in Washington; central and eastern U.S.
Habitat: Roadsides, pastures, and other open, disturbed ground.
Origin: Introduced from Europe
Flowers: March-May
(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
(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
(Penstemon ovatus)
Distribution: Occurring on both sides of the Cascades crest in Washington; southern British Columbia south to northern Oregon.
Habitat: Open woods below 3000 feet in elevation.
Origin: Native
Flowers: May-August
(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
(Penstemon serrulatus)
Distribution: Occurring in the Olympics and Cascades mountains in Washington; Alaska south to Oregon.
Habitat: Moist places at mid- to high elevations in the Cascades, but at lower elevations to the west
Origin: Native
Flowers: June-August
(Penstemon eriantherus)
Distribution: Southeast British Columbia, central Washington and central Oregon, east to North Dakota and Nebraska.
Habitat: Dry, open places in the valleys, plains and foothills, sometimes ascending to moderate elevations in the mountains.
Origin: Native
Flowers: May - July
(Penstemon davidsonii)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California and Nevada.
Habitat: Open, rocky areas, mid- to high elevations in the mountains.
Origin: Native
Flowers: June-August
(Penstemon eriantherus)
Distribution: Southeast British Columbia, central Washington and central Oregon, east to North Dakota and Nebraska.
Habitat: Dry, open places in the valleys, plains and foothills, sometimes ascending to moderate elevations in the mountains.
Origin: Native
Flowers: May - July
(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
(Penstemon glandulosus)
Distribution: 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
(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
(Penstemon humilis)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to the Rocky Mountains.
Habitat: Dry, open, often rocky places, frequently with sagebrush, from the plains and foothills to high elevations in the mountains.
Origin: Native
Flowers: May-July
(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
(Penstemon richardsonii)
Distribution: Chiefly east of the Cascades in Washington; southern British Columbia to Oregon.
Habitat: Cliff crevices and other dry, rocky places at low elevations.
Origin: Native
Flowers: June-August
(Penstemon rupicola)
Distribution: In the Cascades of Washington; Washington south to California.
Habitat: Rock cliffs and rocky slopes at mid- to high elevations in the mountains.
Origin: Native
Flowers: May-August
(Penstemon acuminatus)
Distribution: Douglas County south to Klickitat Count, east to Franklin County; Washington south to Wasco County, Oregon, also in southeastern Oregon and adjacent southwestern Idaho.
Habitat: Dry, open, sandy places at low elevations.
Origin: Native
Flowers: April-June
(Penstemon acuminatus)
Distribution: Douglas County south to Klickitat Count, east to Franklin County; Washington south to Wasco County, Oregon, also in southeastern Oregon and adjacent southwestern Idaho.
Habitat: Dry, open, sandy places at low elevations.
Origin: Native
Flowers: April-June
(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
(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
(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
(Penstemon attenuatus)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to Oregon, east to western Montana and southern Idaho.
Habitat: Drier meadows and moist, open to wooded slopes in the mountains and foothills.
Origin: Native
Flowers: June-August
(Penstemon attenuatus)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to Oregon, east to western Montana and southern Idaho.
Habitat: Drier meadows and moist, open to wooded slopes in the mountains and foothills.
Origin: Native
Flowers: June-August
(Paeonia brownii)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Montana, south to Utah.
Habitat: Sagebrush deserts to ponderosa pine forests.
Origin: Native
Flowers: May-June
(Paeonia brownii)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Montana, south to Utah.
Habitat: Sagebrush deserts to ponderosa pine forests.
Origin: Native
Flowers: May-June
(Lomatium gormanii)
Distribution: East of the Cascades in Washington; Washington south to Oregon, east to Idaho.
Habitat: Open slopes and scablands in the foothills, valleys and plains, often with sagebrush.
Origin: Native
Flowers: March-May
(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
(Lepidium dictyotum)
Distribution: Occurring east of the Cascades crest in Washington; Washington south 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
(Lepidium ramosissimum)
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout much of western and northern North America.
Habitat: Sagebrush, ponderosa pine forest openings, roadsides, fields, and other disturbed open areas.
Origin: Native
Flowers: June-August
(Lepidium latifolium)
Distribution: Chiefly east of the Cascades in Washington but also found in the western lowlands; widely distributed throughout central and western North America.
Habitat: Moist areas and irrigated land, but also on drier areas.
Origin: Introduced from Eurasia
Flowers: June-September
(Lepidium perfoliatum)
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout North America.
Habitat: Disturbed areas, such as overgrazed land and waste areas, usually where dry.
Origin: Introduced from Eurasia
Flowers: March-June
(Lepidium densiflorum)
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout North America.
Habitat: Dry, open areas.
Origin: Native
Flowers: April-June
(Lepidium ramosissimum)
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout much of western and northern North America.
Habitat: Sagebrush, ponderosa pine forest openings, roadsides, fields, and other disturbed open areas.
Origin: Native
Flowers: June-August
(Lepidium densiflorum)
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout North America.
Habitat: Dry, open areas.
Origin: Native
Flowers: April-June
(Lepidium densiflorum)
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout North America.
Habitat: Dry, open areas.
Origin: Native
Flowers: April-June
(Lepidium densiflorum)
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout North America.
Habitat: Dry, open areas.
Origin: Native
Flowers: April-June
(Lepidium latifolium)
Distribution: Chiefly east of the Cascades in Washington but also found in the western lowlands; widely distributed throughout central and western North America.
Habitat: Moist areas and irrigated land, but also on drier areas.
Origin: Introduced from Eurasia
Flowers: June-September
(Lepidium densiflorum)
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout North America.
Habitat: Dry, open areas.
Origin: Native
Flowers: April-June
(Lepidium perfoliatum)
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout North America.
Habitat: Disturbed areas, such as overgrazed land and waste areas, usually where dry.
Origin: Introduced from Eurasia
Flowers: March-June
(Lepidium nitidum)
Distribution: Known from Klickitat County in Washington; Washington south to California.
Habitat: Dry, open areas at low elevation.
Origin: Native
Flowers: March-April
(Lepidium strictum)
Origin: Introduced
(Lepidium dictyotum)
Distribution: Occurring east of the Cascades crest in Washington; Washington south 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
(Lepidium perfoliatum)
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout North America.
Habitat: Disturbed areas, such as overgrazed land and waste areas, usually where dry.
Origin: Introduced from Eurasia
Flowers: March-June
(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
(Lepidium virginicum)
Distribution: Throughout the United States, north to Alaska
Habitat: Weedy native of the lowlands
Origin: Native
Flowers: March - June
(Lepidium latifolium)
Distribution: Chiefly east of the Cascades in Washington but also found in the western lowlands; widely distributed throughout central and western North America.
Habitat: Moist areas and irrigated land, but also on drier areas.
Origin: Introduced from Eurasia
Flowers: June-September
(Lepidium perfoliatum)
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout North America.
Habitat: Disturbed areas, such as overgrazed land and waste areas, usually where dry.
Origin: Introduced from Eurasia
Flowers: March-June
(Lepidium campestre)
Distribution: Distributed across Washington in scattered locations; distributed throughout much of North America.
Habitat: Dry, disturbed areas.
Origin: Introduced from Eurasia
Flowers: May-July
(Lepidium oxycarpum)
Distribution: Chiefly in south-central California, rare in the Pacific Northwest.
Habitat: Usually on saline soil.
Origin: Native
Flowers: March - May
(Lepidium sativum)
Origin: Introduced from western Asia
Flowers: April - June
(Lepidium draba)
Distribution: Occurring chiefly east of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: Widespread weed in lowlands.
Origin: Introduced from Eurasia
Flowers: April-August
(Marsilea oligospora)
Origin: Native
(Lepidium campestre)
Distribution: Distributed across Washington in scattered locations; distributed throughout much of North America.
Habitat: Dry, disturbed areas.
Origin: Introduced from Eurasia
Flowers: May-July
(Lepidium perfoliatum)
Distribution: Chiefly east of the Cascades in Washington; widely distributed throughout North America.
Habitat: Disturbed areas, such as overgrazed land and waste areas, usually where dry.
Origin: Introduced from Eurasia
Flowers: March-June
(Lepidium sativum)
Origin: Introduced from western Asia
Flowers: April - June
(Marsilea vestita)
Distribution: Both sides of the Cascades in Washington; British Columbia south to California, east to Minnesota and Louisiana.
Habitat: Ponds, vernal pools, floodplains.
Origin: Native
Spores: Spores produced April-October
(Lepidium oxycarpum)
Distribution: Chiefly in south-central California, rare in the Pacific Northwest.
Habitat: Usually on saline soil.
Origin: Native
Flowers: March - May
(Lepidium heterophyllum)
Distribution: West of the Cascades in Washington; British Columbia south to California; in scattered locations in eastern U.S.
Habitat: Roadsides, pastures, and other disturbed ground.
Origin: Introduced from Europe
Flowers: May-June
(Marsilea vestita)
Distribution: Both sides of the Cascades in Washington; British Columbia south to California, east to Minnesota and Louisiana.
Habitat: Ponds, vernal pools, floodplains.
Origin: Native
Spores: Spores produced April-October
(Vinca major)
Distribution: Occasionally escapes from gardens, west side of the Cascades.
Habitat: Moderately moist soil.
Origin: Introduced from Europe
Flowers: June - August
(Vinca minor)
Distribution: Introduced in scattered locations across Washington, moreso in western lowlands; occurring in much of eastern North America, where it is considered invasive.
Habitat: Somewhat moist disturbed areas.
Origin: Introduced from Europe
Flowers: March-May
(Phacelia bolanderi)
Distribution: Disjunct in Pacific and Wahkiakum counties, 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
(Phacelia ramosissima)
Distribution: East of the Cascades in central Washington, sout to California, east to southwest Idaho and Arizona.
Habitat: Dry, open places in the plains and foothills, commonly on basaltic talus, ledges and cliffs.
Origin: Native
Flowers: May - August
(Phacelia tetramera)
Origin: Native
Flowers: May - June
(Phacelia minutissima)
Distribution: Uncommon; known from the type locality in Idaho, the Wallowa Mountains of Oregon, Elko County, Nevada, and Kittitas County, Washington.
Habitat: Moderate elevations in the mountains.
Origin: Native
Flowers: July
(Phacelia humilis)
Distribution: Okanogan to Yakima counties in central Washington; south through Oregon to east slope of the Sierra in California and Nevada.
Habitat: Moist to moderately dry soil at low to mid-elevations in the mountains.
Origin: Native
Flowers: May-July
(Phacelia nemoralis)
Distribution: Chiefly from the coast to the lower western slopes of the Cascades in Washington; south to California.
Habitat: Thickets and woodlands, usually in fairly dry and shady areas, at low elevations.
Origin: Native
Flowers: April-July
(Phacelia sericea)
Distribution: In the Olympic and Cascade mountains of Washington; Alaska south to California, east to Montana and New Mexico.
Habitat: Open, often rocky areas, mid- to high elevations in the mountains.
Origin: Native
Flowers: June-August
(Phacelia hastata)
Distribution: Both sides of the Cascades in Washington; British Columbia to California, east to the Dakotas and Nebraska.
Habitat: Dry, open, often sandy areas, low to high elevations.
Origin: Native
Flowers: May-August
(Phacelia glandulifera)
Distribution: Occurring east of the Cascades crest in Washington; Washington south to California, east to Idaho, Nevada, Utah, and Wyoming.
Habitat: Open areas in sagebrush-steppe habitat.
Origin: Native
Flowers: June
(Phacelia heterophylla)
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia south to California, east to Montana and New Mexico.
Habitat: Widespread in dry, open places from the foothills to mid-elevations in the mountains.
Origin: Native
Flowers: May-July
(Phacelia heterophylla)
Distribution: Occurring on both sides of the Cascades in Washington; British Columbia south to California, east to Montana and New Mexico.
Habitat: Widespread in dry, open places from the foothills to mid-elevations in the mountains.
Origin: Native
Flowers: May-July
(Phacelia hastata)
Distribution: Both sides of the Cascades in Washington; British Columbia to California, east to the Dakotas and Nebraska.
Habitat: Dry, open, often sandy areas, low to high elevations.
Origin: Native
Flowers: May-August
(Phacelia nemoralis)
Distribution: Chiefly from the coast to the lower western slopes of the Cascades in Washington; south to California.
Habitat: Thickets and woodlands, usually in fairly dry and shady areas, at low elevations.
Origin: Native
Flowers: April-July
(Adonis aestivalis)
Distribution: Introduced and occasionallhy escaping, but marginally persistant; uncommon in the Pacific Northwest.
Habitat: Disturbed areas.
Origin: Introduced from Europe
Flowers: June
(Phlox caespitosa)
Distribution: East of the Cascades, British Columbia to California, east to Colorado
Habitat: Primarily in and near Ponderosa pine forest.
Origin: Native
Flowers: April - June
(Phlox caespitosa)
Distribution: East of the Cascades, British Columbia to California, east to Colorado
Habitat: Primarily in and near Ponderosa pine forest.
Origin: Native
Flowers: April - June
(Phlox hendersonii)
Distribution: In Washington known from the Olympic Mountains and central Cascades east of the crest; Washington south to Oregon.
Habitat: Open, often rocky areas, mid- to high elevations in the mountains.
Origin: Native
Flowers: July-August
(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
(Phlox longifolia)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Dry, open, rocky places, from the lowlands to moderate or occasionally high elevations in the mountains.
Origin: Native
Flowers: April-June
(Phlox multiflora)
Origin: Native
(Linanthus pungens)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to Baja California, east to Montana and New Mexico.
Habitat: Dry, open, sandy or rocky places, from the deserts and plains to moderate elevations in the drier mountains.
Origin: Native
Flowers: May-July
(Phlox speciosa)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to Idaho, Montana, Nevada, Arizona, and New Mexico.
Habitat: Shrub-steppe, often with sagebrush, and in ponderosa pine areas.
Origin: Native
Flowers: April-June
(Microsteris gracilis)
Distribution: Widely distributed throughout Washington; Alaska south to California, east to the Rocky Mountains and the Great Plains in the U.S.
Habitat: Lowlands and foothills in open, dry to moderately moist places.
Origin: Native
Flowers: March-June
(Phlox colubrina)
Origin: Native
Flowers: April - June
(Phlox mollis)
Origin: Native
(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
(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
(Phlox caespitosa)
Distribution: East of the Cascades, British Columbia to California, east to Colorado
Habitat: Primarily in and near Ponderosa pine forest.
Origin: Native
Flowers: April - June
(Phlox caespitosa)
Distribution: East of the Cascades, British Columbia to California, east to Colorado
Habitat: Primarily in and near Ponderosa pine forest.
Origin: Native
Flowers: April - June
(Phlox solivaga)
Origin: Native
(Salicornia perennis)
Distribution: Along the coast in Washington; Alaska south to Baja California, also on Atlantic coast, Europe, and Mediterranean region.
Habitat: Salt marshes and beaches along coast.
Origin: Native
Flowers: June-October
(Pontederia cordata)
Origin: Introduced
(Salicornia perennis)
Distribution: Along the coast in Washington; Alaska south to Baja California, also on Atlantic coast, Europe, and Mediterranean region.
Habitat: Salt marshes and beaches along coast.
Origin: Native
Flowers: June-October
(Phytolacca americana)
Distribution: A few scattered locations across Washington.
Habitat: Roadsides, pastures, clearings, disturbed areas.
Origin: Introduced
Flowers: June-August
(Tolmiea menziesii)
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska south to California.
Habitat: Moist woods and stream banks, low lands and low elevations in the mountains.
Origin: Native
Flowers: May-August
(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
(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
(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
(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
(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
(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
(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
(Cycloloma atriplicifolium)
Origin: Introduced
(Pilularia americana)
Origin: Native
(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
(Lysimachia arvensis)
Distribution: Scattered locations on both sides of the Cascades in Washington; widely distributed throughout North America.
Habitat: Weed of disturbed open areas, waste ground.
Origin: Introduced
Flowers: May-June
(Samolus parviflorus)
Origin: Native
(Chaenactis thompsonii)
Distribution: Occurring primarily in the serpentine slopes of the Wenatchee Mountains in Washington.
Habitat: Open, usually rocky areas, at moderate to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
(Navarretia sinistra)
Origin: Native
(Navarretia tagetina)
Distribution: Klickitat County, Washington, south to California.
Habitat: Dry, open places at low elevations.
Origin: Native
Flowers: May - June
(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
(Pinus ponderosa)
Distribution: Mostly east of the Cascades, British Columbia to Baja California, east to the Dakotas and Texas; in a few localities in the Puget Trough, Washington, and the Willamette Valley Oregon
Habitat: Mostly dry areas in open forests at low to moderate elevations
Origin: Native
Cones: May - June
(Pinus ponderosa)
Distribution: Mostly east of the Cascades, British Columbia to Baja California, east to the Dakotas and Texas; in a few localities in the Puget Trough, Washington, and the Willamette Valley Oregon
Habitat: Mostly dry areas in open forests at low to moderate elevations
Origin: Native
Cones: May - June
(Lycopodium clavatum)
Distribution: Both sides of the Cascades in Washington; British Columbia south to California in western North America; circumboreal.
Habitat: Moist coniferous woods and swamps.
Origin: Native
Spores: Produces spores April-October
(Pinus ponderosa)
Distribution: Mostly east of the Cascades, British Columbia to Baja California, east to the Dakotas and Texas; in a few localities in the Puget Trough, Washington, and the Willamette Valley Oregon
Habitat: Mostly dry areas in open forests at low to moderate elevations
Origin: Native
Cones: May - June
(Lycopodium clavatum)
Distribution: Both sides of the Cascades in Washington; British Columbia south to California in western North America; circumboreal.
Habitat: Moist coniferous woods and swamps.
Origin: Native
Spores: Produces spores April-October
(Pinus monticola)
Distribution: British Columbia to California, east to Utah and Montana; in the Washington Olympics
Habitat: Moist valleys and drier slopes, near sea level to mid-elevations in the mountains
Origin: Native
Cones: May - June
(Pinus ponderosa)
Distribution: Mostly east of the Cascades, British Columbia to Baja California, east to the Dakotas and Texas; in a few localities in the Puget Trough, Washington, and the Willamette Valley Oregon
Habitat: Mostly dry areas in open forests at low to moderate elevations
Origin: Native
Cones: May - June
(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
(Pterospora andromedea)
Distribution: Widely distributed throughout Washington; British Columbia south to California, east to South Dakota and Texas.
Habitat: Common in humas in coniferous forests, especially ponderosa pine forests.
Origin: Native
Flowers: June-August
(Pityopus californicus)
Origin: Native
Flowers: June - July
(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
(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
(Dianthus armeria)
Distribution: Introduced in most of the United States
Habitat: Escaped from gardens
Origin: Introduced from Europe
Flowers: June - August
(Dianthus deltoides)
Origin: Introduced from Europe
Flowers: April - July
(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
(Arum italicum)
Distribution: Limited number of locations in western Washington; south to California; scattered location in central and eastern U.S.
Habitat: Forest understory and disturbed locations near urbanized areas.
Origin: Introduced from Europe
Flowers: April-June
(Bidens frondosa)
Distribution: Widely distributed throughout much of Washington; widely distributed throughout North America except Alaska and northernmost Canada.
Habitat: Wet areas at low elevations.
Origin: Native
Flowers: June-October
(Plagiobothrys figuratus)
Distribution: Occurring chiefly west of the Cascades and in the Columbia River Gorge in Washington; British Columbia south to Oregon.
Habitat: Nonalkaline meadows, low ground, and moist fields.
Origin: Native
Flowers: May-July
(Plagiobothrys hispidulus)
Origin: Native
(Sisymbrium linifolium)
Distribution: East of the Cascades crest in Washington; British Columbia south to Arizona (not including California), east to the Rocky Mountains.
Habitat: Sagebrush-steppe communities, rock crevices.
Origin: Native
Flowers: April-June
(Sisymbrium linifolium)
Distribution: East of the Cascades crest in Washington; British Columbia south to Arizona (not including California), east to the Rocky Mountains.
Habitat: Sagebrush-steppe communities, rock crevices.
Origin: Native
Flowers: April-June
(Platanus occidentalis)
Distribution: Occurring along the shores of the Columbia River in central Washington; common and native east of the Rocky Mountains, often introduced in western United States.
Habitat: Near streams and lakes, in moist ravines.
Origin: Introduced
Flowers: April-May
(Pseudognaphalium stramineum)
Distribution: Widely distributed throughout much of Washington; British Columbia south to California, east to the Great Plains of the U.S.; New York south to South Carolina.
Habitat: Open, usually moist places, often on disturbed soil.
Origin: Native
Flowers: June-October
(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
(Lunaria annua)
Distribution: Distributed in scattered locations across Washington; British Columbia south 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
(Frasera speciosa)
Distribution: Chiefly east of the Cascades in Washington; Washington south to California, east to the Rocky Mountains, Texas and South Dakota.
Habitat: Open areas to open forests, foothills to subalpine slopes.
Origin: Native
Flowers: June-August
(Tragopogon porrifolius)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout most of North America.
Habitat: Roadsides, fields and waste places, usually where moist.
Origin: Introduced from Europe
Flowers: April-August
(Sarracenia leucophylla)
Origin: Introduced from southeast United States
(Peritoma lutea)
Distribution: East of the Cascades in Washington; widely distributed throughout western U.S.
Habitat: Sagebrush desert to Ponderosa pine forests.
Origin: Native
Flowers: June-September
(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
(Plantago macrocarpa)
Distribution: Occurring along the outer coast in Washington; Alaska south to Oregon.
Habitat: Coastal wetlands.
Origin: Native
Flowers: May-June
(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
(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
(Plantago pusilla)
Origin: Introduced from eastern North America
(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
(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
(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
(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
(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
(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
(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
(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
(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
(Plectritis macrocera)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Vernally moist, open areas; common in shrub-steppe
Origin: Native
Flowers: March-June
(Plectritis ciliosa)
Distribution: Klickitat County, Washington, south through western Oregon to California.
Habitat: Vernally moist, open slopes and meadows.
Origin: Native
Flowers: April - May
(Plectritis congesta)
Distribution: In Washington occurring west of the Cascades crest and in the Columbia River Gorge; Vancouver Island south to California.
Habitat: Open, vernally moist meadows and slopes, sea level to moderate elevations in the moutains.
Origin: Native
Flowers: April-June
(Plectritis brachystemon)
Distribution: In Washington occurring west of the Cascades crest and in the Columbia River Gorge; southern British Columbia south to California.
Habitat: Coastal bluffs, lowland prairies, balds at low elevations in the mountains.
Origin: Native
Flowers: April-June
(Plectritis macrocera)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Vernally moist, open areas; common in shrub-steppe
Origin: Native
Flowers: March-June
(Prunus americana)
Distribution: Northeast Canada and United States, occasionally west to Montana and Utah; rare in Washington.
Habitat: Along watercourses, and on open or wooded, moist or dry areas from the plains into the lower mountains.
Origin: Introduced
Flowers: April - May
(Prunus cerasifera)
Distribution: Introduced and escaped, mostly in Western Washington, but also in southeast Washington.
Habitat: Open, disturbed areas.
Origin: Introduced
Flowers: March-April
(Prunus domestica)
Distribution: Occurring on both sides of the Cascades in Washington; Washington south 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
Flowers: March-May
(Prunus americana)
Distribution: Northeast Canada and United States, occasionally west to Montana and Utah; rare in Washington.
Habitat: Along watercourses, and on open or wooded, moist or dry areas from the plains into the lower mountains.
Origin: Introduced
Flowers: April - May
(Carduus pycnocephalus)
Distribution: Known from Clallam County in Washington; 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
(Aspidotis densa)
Distribution: British Columbia to California, east to Idaho and Montana
Habitat: Cliff crevices and moist, rocky slopes, foothills to near timberline, often on serpentine
Origin: Native
(Croton setigerus)
Distribution: East of the Cascades crest in Washington; Washington south to Baja California.
Habitat: Chiefly in semi-desert conditions, but to the coast in California.
Origin: Native
Flowers: June-August
(Toxicodendron radicans)
Distribution: Occurring east of the Cascades crest in Washington; 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
(Conium maculatum)
Distribution: Widely distributed throughout Washington; widely distributed throughout North America
Habitat: Disturbed areas in moist soil.
Origin: Introduced; native to Europe
Flowers: May-August
(Toxicodendron diversilobum)
Distribution: Mainly west of the Cascades in Washington; British Columbia south to California, east to Nevada.
Habitat: Open woods at low elevations.
Origin: Native
Flowers: April-July
(Phytolacca americana)
Distribution: A few scattered locations across Washington.
Habitat: Roadsides, pastures, clearings, disturbed areas.
Origin: Introduced
Flowers: June-August
(Phytolacca americana)
Distribution: A few scattered locations across Washington.
Habitat: Roadsides, pastures, clearings, disturbed areas.
Origin: Introduced
Flowers: June-August
(Polemonium micranthum)
Distribution: Chiefly east of the Cascades, British Columbia to California, east to North Dakota and Utah
Habitat: Common is open plains and foothills, often with sagebrush
Origin: Native
Flowers: March - May
(Polemonium elegans)
Distribution: Occurring in the Olympics and Cascades mountains in Washington; British Columbia south to Washington.
Habitat: Open, often rocky areas, mid- to high elevations in the mountains.
Origin: Native
Flowers: July-September
(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
(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
(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
(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
(Polemonium pectinatum)
Distribution: Known only from North Whitman County and south Spokane County, Washington.
Habitat: Moist bottom lands.
Origin: Native
Flowers: May-June
(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
(Polypodium amorphum)
Origin: Native
(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
(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
(Polypodium hesperium)
Distribution: Chiefly east of the Cascades, British Columbia to California, east to Montana, Colorado and New Mexico
Habitat: Moist cliffs, ledges and rock crevices, lowlands to mid-elevations in the mountains
Origin: Native
(Potamogeton berchtoldii)
Origin: Native
Flowers: Late June - August
(Potamogeton obtusifolius)
Origin: Native
(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
(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
(Potamogeton crispus)
Distribution: Introduced in much of North America; central and western Washington, western Oregon, and California.
Habitat: Ponds and streams, often forming mats.
Origin: Introduced from Eurasia
Flowers: Late June - August
(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
(Stuckenia pectinata)
Distribution: Both sides of the Cascades in Washington; common throughout North America; Eurasia
Habitat: Shallow, fresh to brackish water.
Origin: Native
Flowers: July-September
(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
(Potamogeton fibrillosus)
Origin: Native
Flowers: June - August
(Potamogeton friesii)
Origin: Native
Flowers: July - August
(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
(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
(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
(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
(Zannichellia palustris)
Distribution: Occurring on both sides of the Cascades crest in Washington; widely distributed throughout much of North America.
Habitat: Fresh to brackish, standing to slow-flowing water, sea level to moderate elevations in the mountains.
Origin: Native
Flowers: June-August
(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
(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
(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
(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
(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
(Potamogeton strictifolius)
Origin: Native
(Potamogeton alpinus)
Origin: Native
Flowers: June - August
(Potamogeton alpinus)
Origin: Native
Flowers: June - August
(Potamogeton epihydrus)
Distribution: Alaska south on both sides of the Cascades to California, east to Newfoundland and northeastern United States.
Habitat: Shallow to deep water.
Origin: Native
Flowers: June - July
(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
(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
(Stuckenia pectinata)
Distribution: Both sides of the Cascades in Washington; common throughout North America; Eurasia
Habitat: Shallow, fresh to brackish water.
Origin: Native
Flowers: July-September
(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
(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
(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
(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
(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
(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
(Populus ×canescens)
Origin: Introduced from Europe
(Populus nigra)
Origin: Introduced
(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
(Eschscholzia californica)
Distribution: Occurring in locations on both sides of the Cascades crest in Washington; British Columbia south to California, east to Arizona and New Mexico.
Habitat: Open, often rocky areas, at low elevations.
Origin: Introduced
Flowers: May-September
(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
(Papaver argemone)
Distribution: Introduced from Europe and occasionally escaping, established in scattered localities east of the Cascades in Washington.
Habitat: Disturbed soil.
Origin: Introduced from Europe
Flowers: May - June
(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
(Kopsiopsis hookeri)
Distribution: West of the Cascades crest in Washington along the Puget Sound and outer coasts; British Columbia south 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
(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
(Solanum tuberosum)
Origin: Introduced from Europe
(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
(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
(Ratibida columnifera)
Distribution: Southeast British Columbia and Montana, east to Minnesota and south to Texas.
Habitat: Prairies, plains and waste ground.
Origin: Introduced
Flowers: June-August
(Dalea ornata)
Distribution: Distributed in the central and southeastern counties in Washington; Washington south 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
(Anemone patens)
Distribution: East of the Cascades crest in Washington; Alaska south to the Wenatchee Mountains of Washington, east to the Rocky Mountains and northern Great Plains.
Habitat: Prairies to mountain slopes, mostly on well-drained soil.
Origin: Native
Flowers: May-August
(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
(Crypsis vaginiflora)
Origin: Introduced from the western Mediterranean
(Opuntia fragilis)
Distribution: British Columbia to California, east to Michigan and Texas
Habitat: Dry, open, often sandy soil
Origin: Native
Flowers: May - June
(Opuntia fragilis)
Distribution: British Columbia to California, east to Michigan and Texas
Habitat: Dry, open, often sandy soil
Origin: Native
Flowers: May - June
(Eremothera boothii)
Origin: Native
(Douglasia laevigata)
Distribution: West of the Cascade crest in Washington; Alaska to Oregon, and in the Washington Olympics.
Habitat: Moist coastal bluffs to rocky alpine ridges.
Origin: Native
Flowers: March-August
(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
(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
(Taraxia subacaulis)
Distribution: Occurring east of the Cascades in Washington; Washington south to California, east to Montana and Colorado.
Habitat: Meadows, benchland, and stream banks, from sagbrush plains to moderate elevations in the mountains, usually where dry by late summer.
Origin: Native
Flowers: April-July
(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
(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
(Taraxia tanacetifolia)
Distribution: East of the Cascades, Washington to California, east to Idaho and Nevada
Habitat: Dry, often sandy or gravelly ground, low to moderate elevations
Origin: Native
Flowers: June - August
(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
(Ludwigia peploides)
Origin: Introduced
(Ludwigia palustris)
Distribution: West side of the Cascades and along the Columbia River in Washington; widespread in North America, Africa and Eurasia.
Habitat: Marshes and bogs.
Origin: Native
Flowers: July-September
(Chimaphila umbellata)
Distribution: Widely distributed throughout Washington; Alaska to California, east to Montana and New Mexico, and Minnesota to Maine, south to North Carolina.
Habitat: Wooded areas, mostly coniferous, low to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
(Chimaphila menziesii)
Distribution: Distributed on both sides of the Cascades in Washington; British Columbia to California, east to Montana and Utah.
Habitat: Coniferous forests at moderate to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
(Chimaphila umbellata)
Distribution: Widely distributed throughout Washington; Alaska to California, east to Montana and New Mexico, and Minnesota to Maine, south to North Carolina.
Habitat: Wooded areas, mostly coniferous, low to mid-elevations in the mountains.
Origin: Native
Flowers: June-August
(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
(Persicaria orientalis)
Origin: Introduced
(Ligustrum ovalifolium)
Origin: Introduced
(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
(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.
Origin: Introduced
Flowers: May-July
(Lithospermum ruderale)
Distribution: Common east of the Cascades in southern British Columbia, Washington and Oregon
Habitat: Shrub-steppe to open, dry areas in the mountains at mid-elevations
Origin: Native
Flowers: April - June
(Cornus canadensis)
Origin: Native
(Uropappus lindleyi)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to Idaho, south to Texas.
Habitat: Open hillsides, forest openings, from low to mid-elevations.
Origin: Native
Flowers: March-May
(Oxytheca dendroidea)
Origin: Native
Flowers: June - August
(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
(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
(Calyptridium umbellatum)
Distribution: In Washington occurring throughout the Cascades Mountains; British Columbia south 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
(Calyptridium roseum)
Origin: Native
(Antennaria alpina)
Distribution: Chiefly in the Cascades and Olympic Mountains of Washington; Circumboreal, extending south in the high mountains to California and Colorado.
Habitat: Alpine meadows.
Origin: Native
Flowers: July-August
(Antennaria media)
Distribution: Circumboreal, south at high elevations in the mountains to California and Arizona
Habitat: Uncommon in high mountain meadows
Origin: Native
Flowers: June - September
(Antennaria umbrinella)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Uncommon in openings in the forest at moderate elevations.
Origin: Native
Flowers: May-August
(Antennaria dimorpha)
Distribution: British Columbia to southern California, east to Montana, Nebraska and Colorado; east of the Cascades in central and eastern Washington.
Habitat: Dry, open places in lowlands to foothills.
Origin: Native
Flowers: April - May
(Antennaria microphylla)
Distribution: Alaska to California, east to North Dakota and Arizona, from lower montane to sub-alpine.
Habitat: Moist, open areas, flood plains of streams, margins of alkali depressions.
Origin: Native
Flowers: June - July
(Antennaria microphylla)
Distribution: Alaska to California, east to North Dakota and Arizona, from lower montane to sub-alpine.
Habitat: Moist, open areas, flood plains of streams, margins of alkali depressions.
Origin: Native
Flowers: June - July
(Antennaria flagellaris)
Distribution: East of the Cascades in Washington and Oregon, east to Wyoming
Habitat: Shrub-steppe to dry, open areas at mid-elevations, often in lithosol
Origin: Native
Flowers: April - July
(Antennaria corymbosa)
Origin: Native
Flowers: June - July
(Antennaria geyeri)
Origin: Native
Flowers: July - August
(Antennaria racemosa)
Distribution: Widely distributed throughout the forested and mountainous areas of Washington; British Columbia south to California, east to the northern Rocky Mountains.
Habitat: Open, modertely dry areas from low to mid-elevations in the mountains.
Origin: Native
Flowers: May-August
(Antennaria parvifolia)
Distribution: Eastern base of the Rocky Mountains, extending westward rarely to eastern Washington and British Columbia.
Habitat: Foothills and dry open areas to moderate elevations.
Origin: Native
Flowers: May-July
(Antennaria dimorpha)
Distribution: British Columbia to southern California, east to Montana, Nebraska and Colorado; east of the Cascades in central and eastern Washington.
Habitat: Dry, open places in lowlands to foothills.
Origin: Native
Flowers: April - May
(Antennaria corymbosa)
Origin: Native
Flowers: June - July
(Antennaria stenophylla)
Distribution: East of the Cascades crest in Washington; Washington south to Nevada, east to Idaho.
Habitat: Shrub-steppe, dry meadows and open woods.
Origin: Native
Flowers: April-June
(Antennaria geyeri)
Origin: Native
Flowers: July - August
(Antennaria microphylla)
Distribution: Alaska to California, east to North Dakota and Arizona, from lower montane to sub-alpine.
Habitat: Moist, open areas, flood plains of streams, margins of alkali depressions.
Origin: Native
Flowers: June - July
(Antennaria monocephala)
Origin: Native
(Antennaria racemosa)
Distribution: Widely distributed throughout the forested and mountainous areas of Washington; British Columbia south to California, east to the northern Rocky Mountains.
Habitat: Open, modertely dry areas from low to mid-elevations in the mountains.
Origin: Native
Flowers: May-August
(Antennaria media)
Distribution: Circumboreal, south at high elevations in the mountains to California and Arizona
Habitat: Uncommon in high mountain meadows
Origin: Native
Flowers: June - September
(Antennaria microphylla)
Distribution: Alaska to California, east to North Dakota and Arizona, from lower montane to sub-alpine.
Habitat: Moist, open areas, flood plains of streams, margins of alkali depressions.
Origin: Native
Flowers: June - July
(Antennaria pulcherrima)
Origin: Native
Flowers: May - August
(Antennaria microphylla)
Distribution: Alaska to California, east to North Dakota and Arizona, from lower montane to sub-alpine.
Habitat: Moist, open areas, flood plains of streams, margins of alkali depressions.
Origin: Native
Flowers: June - July
(Antennaria anaphaloides)
Distribution: Chiefly east of the Cascades, British Columbia to Oregon, east to Montana and Colorado.
Habitat: Hillsides and open woods at moderate elevations in the mountains, occasionally on grassy foothills.
Origin: Native
Flowers: June - July
(Antennaria umbrinella)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Uncommon in openings in the forest at moderate elevations.
Origin: Native
Flowers: May-August
(Antennaria flagellaris)
Distribution: East of the Cascades in Washington and Oregon, east to Wyoming
Habitat: Shrub-steppe to dry, open areas at mid-elevations, often in lithosol
Origin: Native
Flowers: April - July
(Antennaria luzuloides)
Distribution: Chiefly east of the Cascades in Washington. British Columbia south to California, east to Colorado and South Dakota.
Habitat: Open, moderately dry areas from foothills to mid-elevations in the mountains.
Origin: Native
Flowers: May-July
(Antennaria lanata)
Distribution: Both sides of the Cascades in Washington; British Columbia south to Oregon, east to Alberta and Wyoming.
Habitat: Mountain meadows near timberline.
Origin: Native
Flowers: July-September
(Androsace septentrionalis)
Distribution: Northern Washington; circumpolar in the arctic, widespread in Canada, pacific coast of the United States east to Dakotas, Minnesota, and Texas.
Habitat: Alpine meadows.
Origin: Native
Flowers: May-August
(Loeflingia squarrosa)
Origin: Native
(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
(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
(Pyrola dentata)
Origin: Native