Vascular Plants

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

Browse by common name:
A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, W, X, Y, Z
Common names beginning with A:
Absinthe (Artemisia absinthium)
Distribution: Occurring 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, ditches, wastelots, and other disturbed open areas.
Origin: Introduced from Eurasia
Flowers: July-September
White adder's-mouth (Malaxis monophyllos)
Origin: Native
Northern adder's-tongue (Ophioglossum pusillum)
Distribution: Alaska to California, and Montana east to Maine and Virginia
Habitat: Meadows and woods at moderate elevations in the mountains
Origin: Native
Alpine lake agoseris (Nothocalais alpestris)
Distribution: In the Cascades of Washington, mostly from Mt. Rainier south; Washington south to California.
Habitat: Open slopes and meadows from mid- to high elevations in the mountains.
Origin: Native
Flowers: June-August
Annual agoseris (Agoseris heterophylla)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east to Idaho, Montana, Utah, and Arizona.
Habitat: Dry, open areas at low to mid-elevations.
Origin: Native
Flowers: April-July
Field agoseris (Agoseris ×agrestis)
Origin: Native
Large-flowered agoseris (Agoseris grandiflora)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Montana, Idaho and Nevada.
Habitat: Prairies, balds, meadows, and forest openings, often where seasonally dry, from low to middle elevations in the mountains.
Origin: Native
Flowers: May-August
Mountain agoseris (Agoseris monticola)
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Nevada.
Habitat: Mesic meadows in the subalpine and alpine, often in soils of volcanic origin.
Origin: Native
Flowers: July-August
Orange agoseris (Agoseris aurantiaca)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, Great Plains, and Quebec.
Habitat: Meadows and forest openings at from middle elevations to the alpine.
Origin: Native
Flowers: June-August
Pale agoseris (Agoseris glauca)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Yukon Territory to California, east to the Rocky Mountains, northern Great Plains, and Great Lakes region.
Habitat: Open forests and open areas, from low to high elevations in the mountains.
Origin: Native
Flowers: May-August
Seaside agoseris (Agoseris apargioides)
Distribution: Occurring west of the Cascades crest in Washington along the outer coast. Washington to California.
Habitat: Coastal dunes and beach heads.
Origin: Native
Flowers: June-August
Short-beaked agoseris (Agoseris glauca)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Yukon Territory to California, east to the Rocky Mountains, northern Great Plains, and Great Lakes region.
Habitat: Open forests and open areas, from low to high elevations in the mountains.
Origin: Native
Flowers: May-August
Sierra Nevada agoseris (Agoseris monticola)
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Nevada.
Habitat: Mesic meadows in the subalpine and alpine, often in soils of volcanic origin.
Origin: Native
Flowers: July-August
Spear leaved agoseris (Agoseris retrorsa)
Distribution: Occurring east of the Cascades crest in Washington; Washington to California, east to Nevada, Utah, and Arizona.
Habitat: Sagebrush desert, grassy slopes, and ponderosa pine forest openings at low to middle elevations.
Origin: Native
Flowers: May-June
Tall agoseris (Agoseris ×elata)
Distribution: Occurring on both sides of the Cascades crest in Washington; south-central British Columbia to California.
Habitat: Meadows and open woods, from the valleys to middle elevations in the mountains.
Origin: Native
Flowers: June-July
Black alder (Alnus glutinosa)
Distribution: Occurring west of the Cascades crest in King County, where escaping from a wetland restoration planting. Great Lakes region east to the Atlantic Coast.
Habitat: Wetlands at low elevation.
Origin: Introduced from Europe
Flowers: March-May
California alder (Alnus rhombifolia)
Distribution: Chiefly east of the Cascades crest in Washington; Washington south to California and Nevada, east to Idaho.
Habitat: Near streams at low elevations.
Origin: Native
Flowers: January-April
European alder (Alnus glutinosa)
Distribution: Occurring west of the Cascades crest in King County, where escaping from a wetland restoration planting. Great Lakes region east to the Atlantic Coast.
Habitat: Wetlands at low elevation.
Origin: Introduced from Europe
Flowers: March-May
Green alder (Alnus viridis)
Distribution: Widely distributed throughout the mountainous areas of Washington; Alaska south to California, east across the northern half of North America to the Atlantic Coast.
Habitat: Moist areas, low to high elevations.
Origin: Native
Flowers: May-July
Mountain alder (Alnus incana)
Distribution: Occurring east of the Cascades crest in Washington; Alaska south to New Mexico, also in the north-central and northeastern region of North America.
Habitat: Moist places, streamside, low to high elevations.
Origin: Native
Flowers: March-May
Mountain alder (Alnus viridis)
Distribution: Widely distributed throughout the mountainous areas of Washington; Alaska south to California, east across the northern half of North America to the Atlantic Coast.
Habitat: Moist areas, low to high elevations.
Origin: Native
Flowers: May-July
Oregon alder (Alnus rubra)
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, disjunct to the east in northern Idaho.
Habitat: Moist areas at low elevations.
Origin: Native
Flowers: March-April
Red alder (Alnus rubra)
Distribution: Occurring chiefly west of the Cascades crest in Washington; Alaska to California, disjunct to the east in northern Idaho.
Habitat: Moist areas at low elevations.
Origin: Native
Flowers: March-April
White alder (Alnus rhombifolia)
Distribution: Chiefly east of the Cascades crest in Washington; Washington south to California and Nevada, east to Idaho.
Habitat: Near streams at low elevations.
Origin: Native
Flowers: January-April
Heart-leaved Alexanders (Zizia aptera)
Distribution: Occurring east of the Cascades crest in north-central and eastern Washington; Yukon Territory to Nevada, east across much of North America to the Atlantic Coast.
Habitat: Moist or wet meadows, stream banks, and moist low ground; tolerant of alkali.
Origin: Native
Flowers: May-July
Alfalfa (Medicago sativa)
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east to the Atlantic Coast.
Habitat: Roadsides, fields, wastelots, and other disturbed, open areas; often escaping from commercial cultivation.
Origin: Introduced
Flowers: May-October
Sweet alison (Lobularia maritima)
Distribution: Occurring in scattered locations across Washington; British Columbia south to Texas; also occurring throughout central and eastern North America.
Habitat: Escaping from cultivation to roadsides, pastures, and other disturbed areas, often where moist.
Origin: Introduced from the western Mediterranean
Flowers: April-August
Alkali-mallow (Malvella leprosa)
Distribution: Occurring east of the Cascades crest in Washington; north-central Washington to California, east to southern Idaho, the southern Rocky Mountains, and the southern Great Plains.
Habitat: Sagebrush deert, typically in sandy (often alkaline) soil.
Origin: Native
Flowers: June-September
Alkali-sacaton (Sporobolus airoides)
Origin: Native
Flowers: July - August
Coast alkaligrass (Puccinellia maritima)
Origin: Introduced
Weeping alkaligrass (Puccinellia distans)
Distribution: Occurring east of the Cascades in Washington; North-central British Columbia south, chiefly east of the Cascades, to California, east through most of Canada and to the east base of the Rockies.
Habitat: Moist soil, especially where alkaline.
Origin: Introduced
Flowers: June-August
Common alkanet (Anchusa officinalis)
Distribution: Occurring in scattered locations on both sides of the Cascades crest in Washington; British Columbia to California, east to Rocky Mountains and northern Great Plains, also from the Great Lakes region to northeastern North America.
Habitat: Roadsides, fields, ditches, wastelots, and other disturbed, open areas at low elevations.
Origin: Introduced from Mediterranean region
Flowers: May-July
Green alkanet (Pentaglottis sempervirens)
Distribution: Occurring in lowland western Washington; British Columbia south to California.
Habitat: Disturbed soil in shaded areas.
Origin: Introduced from sw Europe
Flowers: April-July
Italian alkanet (Anchusa azurea)
Distribution: Scattered localities in Washington; British Columbia south to California, scattered localities east of the Cascades to the Atlantic Coast.
Habitat: Disturbed soil.
Origin: Introduced from Old World
Flowers: June-August
Allheal (Valeriana officinalis)
Origin: Introduced from Europe
Almond (Prunus dulcis)
Distribution: Escaped from cultivation sporadically in western North America. Native to Asia.
Habitat: Disturbed areas, riparian zones.
Origin: Introduced
Flowers: March-May
Alpine-azalea (Kalmia procumbens)
Distribution: Known in Washington from a single collection in Skagit County; Alaska to Washington, east across Canada and eastern North America to Greenland; also in Europe and Asia.
Habitat: Alpine zone.
Origin: Native
Flowers: July-August
Dwarf alpinegold (Hulsea nana)
Distribution: Known from the Mt. Rainier and Mt. Adams area in Washington; Washington south to California.
Habitat: Generally around volcanic mountains above timberline.
Origin: Native
Flowers: July-September
Alpine alumroot (Heuchera glabra)
Distribution: In the Cascades, Olympics, and Selkirks and m ountains in Washington; Alaska south to Mt. Hood, Oregon.
Habitat: Streambanks and moist rocks, from the coast to above timberline
Origin: Native
Flowers: June-August
Gooseberry-leaved alumroot (Heuchera grossulariifolia)
Distribution: Occurring east of the Cascades crest in the Columbia River Gorge in south-central Washington; Columbia River Gorge to Nevada, east to Idaho and western Montana.
Habitat: Grassy canyons and rocky canyon walls to alpine scree and talus slopes.
Origin: Native
Flowers: May-August
Green-flowered alumroot (Heuchera chlorantha)
Distribution: West of the Cascade summit, Queen Charlotte Island, British Columbia south to Douglas County, Oregon, up the Columbia River Gorge to the east base of the Cascades, then south along the Oregon Cascades to Klamath County, OR.
Habitat: Gravelly prairies and wooded hillsides.
Origin: Native
Flowers: May - August
Lava alumroot (Heuchera cylindrica)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Alberta, Wyoming, and Nevada.
Habitat: Rocky soil, cliffs and talus slopes, foothills to the subalpine.
Origin: Native
Flowers: April-August
Meadow alumroot (Heuchera chlorantha)
Distribution: West of the Cascade summit, Queen Charlotte Island, British Columbia south to Douglas County, Oregon, up the Columbia River Gorge to the east base of the Cascades, then south along the Oregon Cascades to Klamath County, OR.
Habitat: Gravelly prairies and wooded hillsides.
Origin: Native
Flowers: May - August
Poker alumroot (Heuchera cylindrica)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Alberta, Wyoming, and Nevada.
Habitat: Rocky soil, cliffs and talus slopes, foothills to the subalpine.
Origin: Native
Flowers: April-August
Roundleaf alumroot (Heuchera cylindrica)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Alberta, Wyoming, and Nevada.
Habitat: Rocky soil, cliffs and talus slopes, foothills to the subalpine.
Origin: Native
Flowers: April-August
Smallflower alumroot (Heuchera micrantha)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Idaho.
Habitat: Gravelly stream banks, rock crevices and talus slopes, sea level to subalpine.
Origin: Native
Flowers: May-August
Smooth alumroot (Heuchera glabra)
Distribution: In the Cascades, Olympics, and Selkirks and m ountains in Washington; Alaska south to Mt. Hood, Oregon.
Habitat: Streambanks and moist rocks, from the coast to above timberline
Origin: Native
Flowers: June-August
Tall alumroot (Heuchera chlorantha)
Distribution: West of the Cascade summit, Queen Charlotte Island, British Columbia south to Douglas County, Oregon, up the Columbia River Gorge to the east base of the Cascades, then south along the Oregon Cascades to Klamath County, OR.
Habitat: Gravelly prairies and wooded hillsides.
Origin: Native
Flowers: May - August
Desert alyssum (Alyssum desertorum)
Distribution: East of the Cascades in Washington; widely distributed throughout central and western North America.
Habitat: Dry, open ground, often where disturbed.
Origin: Introduced from Eurasia
Flowers: May-June
Hoary alyssum (Berteroa incana)
Distribution: In scattered locations east of the Cascades in Washington; widely distributed throughout much of North America.
Habitat: Uncommon in dry, waste places in most of the Pacific Northwest; common in northeast Washington.
Origin: Introduced from Europe
Flowers: May-August
Small alyssum (Alyssum alyssoides)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia to California, east across North America to the Atlantic Coast.
Habitat: Meadows, forest openings, sagebrush flats, roadsides, fields, and disturbed open areas at low to middle elevations.
Origin: Introduced from Eurasia
Flowers: May-July
Sweet alyssum (Lobularia maritima)
Distribution: Occurring in scattered locations across Washington; British Columbia south to Texas; also occurring throughout central and eastern North America.
Habitat: Escaping from cultivation to roadsides, pastures, and other disturbed areas, often where moist.
Origin: Introduced from the western Mediterranean
Flowers: April-August
Argentina amaranth (Amaranthus deflexus)
Origin: Introduced
Blood amaranth (Amaranthus cruentus)
Origin: Probably introduced from cultivation in Central America
California amaranth (Amaranthus californicus)
Origin: Native
Flowers: July - October
Caterpillar amaranth (Amaranthus cruentus)
Origin: Probably introduced from cultivation in Central America
Green amaranth (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
Green amaranth (Amaranthus powellii)
Distribution: Introduced in much of the United States; common in the Pacific Northwest
Habitat: Disturbed areas
Origin: Introduced from the southwestern United States and Mexico
Flowers: July - October
Hybrid amaranth (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
Livid amaranth (Amaranthus blitum)
Origin: Introduced from the tropics
Pale amaranth (Amaranthus blitum)
Origin: Introduced from the tropics
Powell's amaranth (Amaranthus powellii)
Distribution: Introduced in much of the United States; common in the Pacific Northwest
Habitat: Disturbed areas
Origin: Introduced from the southwestern United States and Mexico
Flowers: July - October
Purple amaranth (Amaranthus cruentus)
Origin: Probably introduced from cultivation in Central America
Smooth amaranth (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
Western ammania (Ammannia robusta)
Distribution: Occurring east of the Cascades crest in Washington chiefly along the Columbia River; British Columbia to California, east to the Great Lakes region and midwestern U.S.
Habitat: Wet places, often where alkaline.
Origin: Native
Flowers: May-June
Seaside amsinckia (Amsinckia spectabilis)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia south to California.
Habitat: Coastal dunes or sandy bluffs.
Origin: Native
Flowers: May-July
Cliff anemone (Anemone multifida)
Distribution: Occurring on both sides of the Cascades crest and in the Olympic Mountains in Washington; Alaska to California, east to the northern Great Plains, Great Lakes region, and northeastern North America.
Habitat: From forest openings in the foothills to alpine meadows.
Origin: Native
Flowers: May-August
Drummond's anemone (Anemone drummondii)
Distribution: Occurring in the Olympic and Cascade Mountains in Washington; Alaska to California, east to Montana and Wyoming.
Habitat: Subalpine to alpine meadows.
Origin: Native
Flowers: June-August
Little mountain anemone (Anemone lyallii)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California.
Habitat: Low elevation prairies to subalpine ridges.
Origin: Native
Flowers: March-July
Lyall's anemone (Anemone lyallii)
Distribution: Occurring chiefly west of the Cascades crest in Washington; British Columbia to California.
Habitat: Low elevation prairies to subalpine ridges.
Origin: Native
Flowers: March-July
Northern anemone (Anemone parviflora)
Distribution: Occurring on both sides of the Cascades crest in the North Cascades in Washington; Alaska to northern Washington, east to Montana and Wyoming, in scattered locations in Utah and Colorado, and also east across northern Canada to the Atlantic Coast.
Habitat: Mountain meadows and subalpine stream banks.
Origin: Native
Flowers: May-August
Oregon anemone (Anemone oregana)
Distribution: Occurring in forested areas on both sides of the Cascades crest in Washington; Washington to northern California.
Habitat: Moist, open woods, low to mid-elevations in the mountains, also in marshes and bogs along the coast.
Origin: Native
Flowers: March-June
Pacific anemone (Anemone multifida)
Distribution: Occurring on both sides of the Cascades crest and in the Olympic Mountains in Washington; Alaska to California, east to the northern Great Plains, Great Lakes region, and northeastern North America.
Habitat: From forest openings in the foothills to alpine meadows.
Origin: Native
Flowers: May-August
Piper's anemone (Anemone piperi)
Distribution: Occurring east of the Cascades crest in Washington in the far eastern part of the state; Washington to northeast Oregon east to Idaho and western Montana.
Habitat: Shady woods at moderate elevations in the mountains.
Origin: Native
Flowers: April-June
Small-flowered anemone (Anemone parviflora)
Distribution: Occurring on both sides of the Cascades crest in the North Cascades in Washington; Alaska to northern Washington, east to Montana and Wyoming, in scattered locations in Utah and Colorado, and also east across northern Canada to the Atlantic Coast.
Habitat: Mountain meadows and subalpine stream banks.
Origin: Native
Flowers: May-August
Threeleaf anemone (Anemone deltoidea)
Distribution: Occurring west of the Cascades crest and east in the Columbia River Gorge in Washington; Washington to California.
Habitat: Dry to moist woodlands at low to middle elevations.
Origin: Native
Flowers: April-May
Canby's angelica (Angelica canbyi)
Distribution: Occurring chiefly east of the Cascades crest in Washington, though disjunct on the Olympic Peninsula; northern Washington to central and northeastern Oregon.
Habitat: Meadows and forest openings, generally where moist, from low to middle elevations in the mountains.
Origin: Native
Flowers: June-September
Henderson's angelica (Angelica hendersonii)
Distribution: Occurring on the outer coast in Washington; northwestern Washington to California.
Habitat: Coastal bluffs and sand dunes.
Origin: Native
Flowers: July-August
Kneeling angelica (Angelica genuflexa)
Distribution: Occurring chiefly west of the Cascades crest and east in the Columbia River Gorge in Washington; Alaska to California, east in British Columbia to the Selkirk Mountains.
Habitat: Stream banks, wet meadows and other moist places, from low to middle elevations in the mountains.
Origin: Native
Flowers: July-September
Lyall's angelica (Angelica arguta)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Alberta and Utah.
Habitat: Stream banks, wet meadows, marshes and bottomlands, from the foothills and valleys to moderate elevations in the mountains.
Origin: Native
Flowers: June-August
Seacoast angelica (Angelica lucida)
Distribution: Occurring west of the Cascades crest in Washington in the coastal counties; Alaska to California, also in eastern North America; Far East Russia.
Habitat: Coastal bluffs, beaches, and estuaries.
Origin: Native
Flowers: July-September
Sharp-tooth angelica (Angelica arguta)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Alberta and Utah.
Habitat: Stream banks, wet meadows, marshes and bottomlands, from the foothills and valleys to moderate elevations in the mountains.
Origin: Native
Flowers: June-August
Woolly angelica (Angelica hendersonii)
Distribution: Occurring on the outer coast in Washington; northwestern Washington to California.
Habitat: Coastal bluffs and sand dunes.
Origin: Native
Flowers: July-August
Rocky Mountain ankle-aster (Ionactis stenomeres)
Distribution: Southeast British Columbia and northeast Washington, and adjacent Idaho and Montana.
Habitat: Open hillsides and forest openings, moderate to fairly high elevations in the mountains.
Origin: Native
Flowers: Late June - Early September
Queen Anne's-lace (Daucus carota)
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to California, east across North America to the Atlantic Coast.
Habitat: Roadsides, fields, ditches, meadows, lawns, and other disturbed open areas.
Origin: Introduced from Europe
Flowers: June-September
Sweet Annie (Artemisia annua)
Distribution: Occurring in scattered locations east of the Cascades crest and in the Columbia River Gorge in Washington; Washington to California, east across most of North America to the Atlantic Coast.
Habitat: Roadsides, fields, ditches, wastelots, and other disturbed open places.
Origin: Introduced from Eurasia
Flowers: August-October
Antelope-brush (Purshia tridentata)
Distribution: Widely distributed east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Sagebrush desert and shrub-steppe to ponderosa pine forests.
Origin: Native
Flowers: April-June
St. Anthony's-turnip (Ranunculus bulbosus)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California, also widespread in eastern North America.
Habitat: Disturbed open areas at low elevation.
Origin: Introduced from Europe
Flowers: May-June
Apargidium (Microseris borealis)
Distribution: Occurring west of the Cascades crest in Washington; southern Alaska south to northern California.
Habitat: Sphagnum bogs and wet meadows in the mountains.
Origin: Native
Flowers: June-August
Apple (Malus domestica)
Origin: Introduced
Cultivated apple (Malus domestica)
Origin: Introduced
Dawson apple (Malus ×dawsoniana)
Distribution: Occurring west of the Cascades crest in Washington; Washington south to Oregon.
Habitat: Fields, roadsides, wastelots, and abandoned homesteads.
Origin: Introduced
Flowers: April-May
Sacred thorn apple (Datura wrightii)
Distribution: Scattered locations across Washington; California east across the U.S. to New England.
Habitat: Disturbed, dry, open areas, roadsides, and waste places.
Origin: Introduced from Mexico
Flowers: June-August
Apple of Peru (Nicandra physalodes)
Origin: Introduced
Apricot (Prunus armeniaca)
Origin: Introduced
Yellow archangel (Lamium galeobdolon)
Distribution: Occurring west of the Cascades crest in Washington; British Columbia to California, also in eastern North America.
Habitat: Lowland forest understory, often where disturbed.
Origin: Introduced from Eurasia
Flowers: April-June
Broad-leaved arnica (Arnica latifolia)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains.
Habitat: Common in forest openings and meadows, and open, rocky areas from middle to high elevations in the mountains.
Origin: Native
Flowers: June-August
Bunch arnica (Arnica sororia)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Alberta, Montana, and Wyoming.
Habitat: From low elevation prairies and grasslands to coniferous forest openings at middle elevations.
Origin: Native
Flowers: May-July
Clasping arnica (Arnica lanceolata)
Distribution: Occurring on both sides of the Cascades crest in Washington, including the Olympic Mountains and the northeastern region; Alaska to California, east to the Rocky Mountains, also in northeastern North America.
Habitat: Streambanks, moist woods and meadows from middle elevations to the subalpine.
Origin: Native
Flowers: June-August
Cordilleran arnica (Arnica mollis)
Distribution: Occurring on both sides of the Cascades crest and in the Olympic Mountains in Washington; Alaska to California, east to the Rocky Mountains.
Habitat: Moist meadows from middle elevations to the alpine.
Origin: Native
Flowers: June-September
Hairy arnica (Arnica mollis)
Distribution: Occurring on both sides of the Cascades crest and in the Olympic Mountains in Washington; Alaska to California, east to the Rocky Mountains.
Habitat: Moist meadows from middle elevations to the alpine.
Origin: Native
Flowers: June-September
Heart-leaf arnica (Arnica cordifolia)
Distribution: Occurring chiefly east of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains, northern Great Plains, and the Great Lakes region.
Habitat: Light forest understory, openings, and edge, from low elevations to the subalpine.
Origin: Native
Flowers: April-July
Hillside arnica (Arnica fulgens)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Meadows and open slopes from the foothills to middle elevations in the mountains
Origin: Native
Flowers: May-July
Leafy arnica (Arnica chamissonis)
Distribution: Occurring both sides of the Cascades, including the northeastern corner of Washington; Alaska to California, east to the Rocky Mountains, east across Canada to the Atlantic Coast.
Habitat: Meadows and wet places from middle elevations to the subalpine.
Origin: Native
Flowers: June-September
Longleaf arnica (Arnica longifolia)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Rocky soil in seeps or springs, cliffs, or riverbanks, from middle elevations to the alpine.
Origin: Native
Flowers: July-September
Meadow arnica (Arnica chamissonis)
Distribution: Occurring both sides of the Cascades, including the northeastern corner of Washington; Alaska to California, east to the Rocky Mountains, east across Canada to the Atlantic Coast.
Habitat: Meadows and wet places from middle elevations to the subalpine.
Origin: Native
Flowers: June-September
Mountain arnica (Arnica latifolia)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to the Rocky Mountains.
Habitat: Common in forest openings and meadows, and open, rocky areas from middle to high elevations in the mountains.
Origin: Native
Flowers: June-August
Narrowleaf arnica (Arnica chamissonis)
Distribution: Occurring both sides of the Cascades, including the northeastern corner of Washington; Alaska to California, east to the Rocky Mountains, east across Canada to the Atlantic Coast.
Habitat: Meadows and wet places from middle elevations to the subalpine.
Origin: Native
Flowers: June-September
Nevada arnica (Arnica nevadensis)
Distribution: Occurring in the Cascades and Olympic mountains in Washington; Washington to California, east to Nevada.
Habitat: Open, rocky slopes and forest openings in the subalpine and alpine.
Origin: Native
Flowers: June-August
Orange arnica (Arnica fulgens)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Meadows and open slopes from the foothills to middle elevations in the mountains
Origin: Native
Flowers: May-July
Parry's arnica (Arnica parryi)
Distribution: Occurring on both sides of the Cascades crest in Washington; Yukon Territory to California, east to the Rocky Mountains.
Habitat: Open woods and meadows, from middle elevations to the alpine.
Origin: Native
Flowers: June-August
Rayless arnica (Arnica discoidea)
Distribution: Occurring in the Cascades Mountains of Klickitat and Skamania counties in Washington; Washington to California, east to Nevada.
Habitat: Forest openings from middle elevations to the subalpine.
Origin: Native
Flowers: June-August
Rydberg's arnica (Arnica rydbergii)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to northern California, east to Alberta and Colorado.
Habitat: Dry meadows and open slopes at high elevations in the mountains.
Origin: Native
Flowers: June-August
Seep spring arnica (Arnica longifolia)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
Habitat: Rocky soil in seeps or springs, cliffs, or riverbanks, from middle elevations to the alpine.
Origin: Native
Flowers: July-September
Sierra arnica (Arnica nevadensis)
Distribution: Occurring in the Cascades and Olympic mountains in Washington; Washington to California, east to Nevada.
Habitat: Open, rocky slopes and forest openings in the subalpine and alpine.
Origin: Native
Flowers: June-August
Silvery arnica (Arnica chamissonis)
Distribution: Occurring both sides of the Cascades, including the northeastern corner of Washington; Alaska to California, east to the Rocky Mountains, east across Canada to the Atlantic Coast.
Habitat: Meadows and wet places from middle elevations to the subalpine.
Origin: Native
Flowers: June-September
Slender arnica (Arnica gracilis)
Distribution: Occurring on both sides of the Cascades crest in the mountainous areas in Washington; British Columbia to Oregon, east to Alberta, Montana, Wyoming, and Utah.
Habitat: Dry, rocky slopes and meadows, from the subalpine to alpine.
Origin: Native
Flowers: June-August
Sticky arnica (Arnica ovata)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Montana and Utah.
Habitat: Rocky places from middle elevations to the subalpine and alpine.
Origin: Native
Flowers: July-September
Sticky-leaf arnica (Arnica ovata)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Montana and Utah.
Habitat: Rocky places from middle elevations to the subalpine and alpine.
Origin: Native
Flowers: July-September
Stream bank arnica (Arnica lanceolata)
Distribution: Occurring on both sides of the Cascades crest in Washington, including the Olympic Mountains and the northeastern region; Alaska to California, east to the Rocky Mountains, also in northeastern North America.
Habitat: Streambanks, moist woods and meadows from middle elevations to the subalpine.
Origin: Native
Flowers: June-August
Subalpine arnica (Arnica rydbergii)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to northern California, east to Alberta and Colorado.
Habitat: Dry meadows and open slopes at high elevations in the mountains.
Origin: Native
Flowers: June-August
Twin arnica (Arnica sororia)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia to California, east to Alberta, Montana, and Wyoming.
Habitat: From low elevation prairies and grasslands to coniferous forest openings at middle elevations.
Origin: Native
Flowers: May-July
Awl-leaf arrow-grass (Triglochin scilloides)
Distribution: Occurring chiefly west of the Cascades crest along the coastal counties in Washington; British Columbia to Baja California, Mexico, east to the Rocky Mountains and northern Great Plains; also in South America.
Habitat: Generally in shallow water, but often stranded in mud at edge of receding ponds, coastal tideflats to interior valleys.
Origin: Native
Flowers: July-September
Graceful arrow-grass (Triglochin concinna)
Origin: Native
Marsh arrow-grass (Triglochin palustris)
Origin: Native
Flowers: June - August
Seaside arrow-grass (Triglochin maritima)
Distribution: Widely distributed throughout much of Washington; Alaska south to California, east to the Rocky Mountains, then mostly across northern U.S. and southern Canada to the Atlantic Coast.
Habitat: Marsh to moist, gravelly areas, mostly were saline or alkaline.
Origin: Native
Flowers: May-August
Arumleaf arrowhead (Sagittaria cuneata)
Distribution: East of the Cascades in Washington; British Columbia south to California, east to New York.
Habitat: Ponds, lake shores and ditches.
Origin: Native
Flowers: June-August
Awl-leaf arrowhead (Sagittaria subulata)
Origin: Introduced from tidewaters in eastern North America
Common arrowhead (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
Delta arrowhead (Sagittaria platyphylla)
Distribution: Known from the Puget Sound lowlands in Washington; south-central U.S., and in scattered locations in central and northeastern U.S.
Habitat: Pond and lake margins.
Origin: Introduced
Flowers: June-August
Grassy arrowhead (Sagittaria graminea)
Distribution: Occurring west of the Cascades in Washington; primary distribution is east of the Mississippi River.
Habitat: Wetlands, ponds, and lakes
Origin: Introduced
Flowers: June-August
Northern arrowhead (Sagittaria cuneata)
Distribution: East of the Cascades in Washington; British Columbia south to California, east to New York.
Habitat: Ponds, lake shores and ditches.
Origin: Native
Flowers: June-August
Sessile-fruited arrowhead (Sagittaria rigida)
Distribution: Occurring in lowland areas west of the Cascades crest in Washington; California; central U.S. and southern Canada east to northeastern U.S. and Canada; scattered locations elsewhere in U.S. and Canada.
Habitat: Pond and lake margins.
Origin: Introduced from eastern North America
Flowers: June-August
Jerusalem artichoke (Helianthus tuberosus)
Distribution: Introdued and widespread in eastern United States; uncommon in the Pacific Northwest.
Habitat: Moist soil and waste places.
Origin: Introduced
Flowers: August - October
Arrow arum (Peltandra virginica)
Distribution: Occurring in scattered locations west of the Cascades crest in Washington; western Washington to northwestern Oregon, otherwise eastern North America where native.
Habitat: Shallow water of slow moving water, ponds, and lake shores at low elevation.
Origin: Introduced from eastern North America
Flowers: June-August
Green ash (Fraxinus pennsylvanica)
Distribution: Occurring chiefly east of the Cascades crest in Washington; widely distributed throughout much of North America except some West Coast states and provinces.
Habitat: Riparian zones where soil is moist but not saturated.
Origin: Introduced
Flowers: April-June
Greene's mountain ash (Sorbus scopulina)
Distribution: Alaska south to California, east to the Dakotas and Colorado.
Habitat: Open areas, from the foothils to sub-alpine.
Origin: Native
Flowers: May - Early July
Oregon ash (Fraxinus latifolia)
Distribution: Occurring chiefly west of the Cascades crest but also east in the Columbia River Gorge in Washington; southwestern British Columbia to California.
Habitat: Forest edge, thickets, prairie margins, and fields, generally where moist.
Origin: Native
Flowers: March-May
Asparagus (Asparagus officinalis)
Distribution: Introduced throughout the United States
Habitat: Garden escape, often of roadsides.
Origin: Introduced from Eurasia
Flowers: July - August
Quaking aspen (Populus tremuloides)
Distribution: Broadly distributed in Washington, but chiefly east of the Cascades in Washington; Alaska to California, east to Labrador and New Jersey.
Habitat: Moist areas, low to fairly high elevations in the mountains
Origin: Native
Flowers: April-June
Alkali American aster (Symphyotrichum ciliatum)
Distribution: Occurring east of the Cascades in northern Washington; British Columbia south to northern Washington, east to Minnesota.
Habitat: Moist, usually saline ground, often along the shores of lakes and ponds.
Origin: Native
Flowers: August-September
Alkali aster (Symphyotrichum frondosum)
Distribution: Eastern Washington, south to California and east to Wyoming and Utah.
Habitat: Moist, usually saline soil, often along the shores of lakes and ponds, or in vernally moist, alkaline bottoms.
Origin: Native
Flowers: August - October
Alpine leafybract aster (Symphyotrichum foliaceum)
Distribution: Alaska to California, east to Colorado
Habitat: Open, usually moist areas, low to high elevations in the mountains.
Origin: Native
Flowers: July-September
Amethyst aster (Symphyotrichum ×amethystinum)
Origin: Introduced
Arctic aster (Eurybia merita)
Origin: Native
Flowers: July - August
Arctic aster (Eurybia sibirica)
Distribution: Circumboreal; found in northern Rocky mountains, Pacific Northwest, and northward through Alberta, British Columbia, Yukon and Northwest Territories, and Alaska.
Habitat: In Washington, this species is found in alpine and subalpine meadows.
Origin: Native
Flowers: July - August
Behring wood aster (Eurybia merita)
Origin: Native
Flowers: July - August
Behring wood aster (Eurybia sibirica)
Distribution: Circumboreal; found in northern Rocky mountains, Pacific Northwest, and northward through Alberta, British Columbia, Yukon and Northwest Territories, and Alaska.
Habitat: In Washington, this species is found in alpine and subalpine meadows.
Origin: Native
Flowers: July - August
Bracted aster (Symphyotrichum bracteolatum)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Sasketchewan and Rocky Mountain states.
Habitat: Moist to wet sunny places, wet thickets, along streams and ditches
Origin: Native
Flowers: July-September
Canby's leafybract aster (Symphyotrichum foliaceum)
Distribution: Alaska to California, east to Colorado
Habitat: Open, usually moist areas, low to high elevations in the mountains.
Origin: Native
Flowers: July-September
Cascade aster (Eucephalus ledophyllus)
Distribution: Cascade Mountains from northern Washington to southern Oregon.
Habitat: Meadows and open woods, mid-elevations up to timberline in the mountains.
Origin: Native
Flowers: July-September
Columbian white-topped aster (Sericocarpus rigidus)
Distribution: West of the Cascades from southern Vancouver Island, BC, to southwest Oregon, but chiefly in Washington.
Habitat: Prairies and open areas at low elevations.
Origin: Native
Flowers: July - August
Columbian whitetop aster (Sericocarpus rigidus)
Distribution: West of the Cascades from southern Vancouver Island, BC, to southwest Oregon, but chiefly in Washington.
Habitat: Prairies and open areas at low elevations.
Origin: Native
Flowers: July - August
Common California aster (Symphyotrichum chilense)
Distribution: Both sides of the Cascades, Washington to California, east to Montana and New Mexico.
Habitat: Dry, open places in the valleys and plains, to moderate elevations in the mountains.
Origin: Native
Flowers: July-October
Cusick's American aster (Symphyotrichum foliaceum)
Distribution: Alaska to California, east to Colorado
Habitat: Open, usually moist areas, low to high elevations in the mountains.
Origin: Native
Flowers: July-September
Cusick's aster (Symphyotrichum foliaceum)
Distribution: Alaska to California, east to Colorado
Habitat: Open, usually moist areas, low to high elevations in the mountains.
Origin: Native
Flowers: July-September
Douglas' aster (Symphyotrichum subspicatum)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Alberta, Montana and Idaho.
Habitat: Moist woods, streambanks and seashores.
Origin: Native
Flowers: July-September
Douglas's aster (Symphyotrichum subspicatum)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia south to California, east to Alberta, Montana and Idaho.
Habitat: Moist woods, streambanks and seashores.
Origin: Native
Flowers: July-September
Eaton's aster (Symphyotrichum bracteolatum)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Sasketchewan and Rocky Mountain states.
Habitat: Moist to wet sunny places, wet thickets, along streams and ditches
Origin: Native
Flowers: July-September
Engelmann's aster (Eucephalus engelmannii)
Distribution: Distributed on both sides of the Cascades in Washington; British Columbia south to Nevada, east to Alberta and south to Colorado.
Habitat: Open woods, foothills to high elevations in the mountains.
Origin: Native
Flowers: June-September
Few-flowered aster (Canadanthus modestus)
Distribution: Widely distributed on both sides of the Cascades crest in the mountainous areas of Washington; Yukon Territory to Oregon, east to the northern Great Plains and Great Lakes region.
Habitat: Streambanks, pond and lake margins, and moist woods at middle-elevations in the mountains.
Origin: Native
Flowers: July-September
Geyer's aster (Symphyotrichum laeve)
Distribution: Eastern British Columbia, eastern Washington and northeast Oregon, east to Maine and Georgia.
Habitat: Open places in the plains and valleys to moderate elevations in the mountains.
Origin: Native
Flowers: July - September
Great northern aster (Canadanthus modestus)
Distribution: Widely distributed on both sides of the Cascades crest in the mountainous areas of Washington; Yukon Territory to Oregon, east to the northern Great Plains and Great Lakes region.
Habitat: Streambanks, pond and lake margins, and moist woods at middle-elevations in the mountains.
Origin: Native
Flowers: July-September
Hairy aster (Symphyotrichum pilosum)
Habitat: River cobbles, gravel, disturbed ground, and railroads.
Origin: Introduced
Flowers: August-September
Hall's aster (Symphyotrichum hallii)
Distribution: West of the Cascades in Washington and, more commonly, in Oregon.
Habitat: Dry, open places in the valleys and plains.
Origin: Native
Flowers: July - October
Heath-leaved aster (Symphyotrichum ericoides)
Distribution: Occurring chiefly east of the Cascades crest in Washington; southern British Columbia and eastern Washington and Montana, south to Utah, Colorado and Nebraska.
Habitat: Open, wet or dry places in the valleys and plains; tolerant of alkali.
Origin: Native
Flowers: July-September
Henderson's aster (Symphyotrichum foliaceum)
Distribution: Alaska to California, east to Colorado
Habitat: Open, usually moist areas, low to high elevations in the mountains.
Origin: Native
Flowers: July-September
Hybrid aster (Symphyotrichum ×amethystinum)
Origin: Introduced
Hybrid aster (Symphyotrichum ×columbianum)
Origin: Native
Intermountain aster (Symphyotrichum ascendens)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Meadows, grasslands, and forest openings, often where moist.
Origin: Native
Flowers: July-October
Jessica's aster (Symphyotrichum jessicae)
Distribution: The Palouse country of southeast Washington and adjacent Idaho.
Habitat: Streambanks and open places.
Origin: Native
Flowers: July - September
Klickitat aster (Eucephalus glaucescens)
Distribution: Occurring on both sides of the Cascades crest in Washington; endemic (only occurring in) Washington.
Habitat: Forest openings and meadows at low to moderate elevations.
Origin: Native
Flowers: July-October
Kootenai aster (Symphyotrichum foliaceum)
Distribution: Alaska to California, east to Colorado
Habitat: Open, usually moist areas, low to high elevations in the mountains.
Origin: Native
Flowers: July-September
Leafy aster (Symphyotrichum foliaceum)
Distribution: Alaska to California, east to Colorado
Habitat: Open, usually moist areas, low to high elevations in the mountains.
Origin: Native
Flowers: July-September
Leafy-bracted aster (Symphyotrichum foliaceum)
Distribution: Alaska to California, east to Colorado
Habitat: Open, usually moist areas, low to high elevations in the mountains.
Origin: Native
Flowers: July-September
Leafybract aster (Symphyotrichum foliaceum)
Distribution: Alaska to California, east to Colorado
Habitat: Open, usually moist areas, low to high elevations in the mountains.
Origin: Native
Flowers: July-September
Long leaved aster (Symphyotrichum ascendens)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Meadows, grasslands, and forest openings, often where moist.
Origin: Native
Flowers: July-October
Long-leaved aster (Symphyotrichum ascendens)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Meadows, grasslands, and forest openings, often where moist.
Origin: Native
Flowers: July-October
Marsh aster (Symphyotrichum lanceolatum)
Origin: Native
New England aster (Symphyotrichum novae-angliae)
Distribution: Native to eastern United States; introduced as an ornamental and occasionally escaping in the Pacific Northwest.
Habitat: Roadsides and disturbed areas where somewhat moist.
Origin: Introduced
Flowers: July-September
Northern bog aster (Symphyotrichum boreale)
Distribution: Alaska south to Idaho, east to Minnesota; rare in the Pacific Northwest.
Habitat: Cold bogs.
Origin: Native
Flowers: July - September
Olympic Mountain aster (Eucephalus paucicapitatus)
Distribution: Olympic Mountains of Washington and Vancouver Island, British Columbia.
Habitat: Open slopes, mid- to high elevations.
Origin: Native
Flowers: July-September
Oregon aster (Symphyotrichum bracteolatum)
Distribution: Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Sasketchewan and Rocky Mountain states.
Habitat: Moist to wet sunny places, wet thickets, along streams and ditches
Origin: Native
Flowers: July-September
Oregon white topped aster (Sericocarpus oregonensis)
Distribution: Occurring in the Columbia River Gorge in Washington; Washington south to California.
Habitat: Grasslands, forest openings, and savanna.
Origin: Native
Flowers: July-September
Pacific aster (Symphyotrichum chilense)
Distribution: Both sides of the Cascades, Washington to California, east to Montana and New Mexico.
Habitat: Dry, open places in the valleys and plains, to moderate elevations in the mountains.
Origin: Native
Flowers: July-October
Palouse aster (Symphyotrichum jessicae)
Distribution: The Palouse country of southeast Washington and adjacent Idaho.
Habitat: Streambanks and open places.
Origin: Native
Flowers: July - September
Parry's aster (Symphyotrichum foliaceum)
Distribution: Alaska to California, east to Colorado
Habitat: Open, usually moist areas, low to high elevations in the mountains.
Origin: Native
Flowers: July-September
Rayless alkali aster (Symphyotrichum ciliatum)
Distribution: Occurring east of the Cascades in northern Washington; British Columbia south to northern Washington, east to Minnesota.
Habitat: Moist, usually saline ground, often along the shores of lakes and ponds.
Origin: Native
Flowers: August-September
Rayless annual aster (Symphyotrichum ciliatum)
Distribution: Occurring east of the Cascades in northern Washington; British Columbia south to northern Washington, east to Minnesota.
Habitat: Moist, usually saline ground, often along the shores of lakes and ponds.
Origin: Native
Flowers: August-September
Rigid white topped aster (Sericocarpus rigidus)
Distribution: West of the Cascades from southern Vancouver Island, BC, to southwest Oregon, but chiefly in Washington.
Habitat: Prairies and open areas at low elevations.
Origin: Native
Flowers: July - August
Rocky Mountain aster (Ionactis stenomeres)
Distribution: Southeast British Columbia and northeast Washington, and adjacent Idaho and Montana.
Habitat: Open hillsides and forest openings, moderate to fairly high elevations in the mountains.
Origin: Native
Flowers: Late June - Early September
Rough leaved aster (Eurybia radulina)
Distribution: Chiefly on the east side of the Cascades in Washington from low to moderate elevations; south to central California.
Habitat: Open woods.
Origin: Native
Flowers: July-September
Rough white prairie aster (Symphyotrichum falcatum)
Origin: Native
Rush aster (Symphyotrichum boreale)
Distribution: Alaska south to Idaho, east to Minnesota; rare in the Pacific Northwest.
Habitat: Cold bogs.
Origin: Native
Flowers: July - September
Short rayed aster (Symphyotrichum frondosum)
Distribution: Eastern Washington, south to California and east to Wyoming and Utah.
Habitat: Moist, usually saline soil, often along the shores of lakes and ponds, or in vernally moist, alkaline bottoms.
Origin: Native
Flowers: August - October
Short-rayed alkali aster (Symphyotrichum frondosum)
Distribution: Eastern Washington, south to California and east to Wyoming and Utah.
Habitat: Moist, usually saline soil, often along the shores of lakes and ponds, or in vernally moist, alkaline bottoms.
Origin: Native
Flowers: August - October
Showy aster (Eurybia conspicua)
Distribution: Northeast Oregon and eastern Washington, east to Wyoming and north to Saskatchewan
Habitat: Open woods, foothills to mid-elevations in the mountains
Origin: Native
Flowers: July - September
Siberian aster (Eurybia merita)
Origin: Native
Flowers: July - August
Siberian aster (Eurybia sibirica)
Distribution: Circumboreal; found in northern Rocky mountains, Pacific Northwest, and northward through Alberta, British Columbia, Yukon and Northwest Territories, and Alaska.
Habitat: In Washington, this species is found in alpine and subalpine meadows.
Origin: Native
Flowers: July - August
Slender white aster (Symphyotrichum boreale)
Distribution: Alaska south to Idaho, east to Minnesota; rare in the Pacific Northwest.
Habitat: Cold bogs.
Origin: Native
Flowers: July - September
Smooth aster (Symphyotrichum laeve)
Distribution: Eastern British Columbia, eastern Washington and northeast Oregon, east to Maine and Georgia.
Habitat: Open places in the plains and valleys to moderate elevations in the mountains.
Origin: Native
Flowers: July - September
Subalpine aster (Eurybia merita)
Origin: Native
Flowers: July - August
Thick stemmed aster (Eurybia integrifolia)
Distribution: Occurring in the northeastern and southeastern regions of Washington; Washington south to California, east to Montana, Wyoming, and Utah.
Habitat: Dry meadows, open coniferous forests, and riparian areas at mid to higher elevations.
Origin: Native
Flowers: June-September
Tufted white prairie aster (Symphyotrichum ericoides)
Distribution: Occurring chiefly east of the Cascades crest in Washington; southern British Columbia and eastern Washington and Montana, south to Utah, Colorado and Nebraska.
Habitat: Open, wet or dry places in the valleys and plains; tolerant of alkali.
Origin: Native
Flowers: July-September
Western American aster (Symphyotrichum ascendens)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Meadows, grasslands, and forest openings, often where moist.
Origin: Native
Flowers: July-October
Western aster (Symphyotrichum ascendens)
Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains and northern Great Plains.
Habitat: Meadows, grasslands, and forest openings, often where moist.
Origin: Native
Flowers: July-October
Western aster (Symphyotrichum spathulatum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Meadows and forest openings, moderate to mid-elevations in the mountains.
Origin: Native
Flowers: July-September
Western heath aster (Symphyotrichum falcatum)
Origin: Native
Western meadow aster (Symphyotrichum campestre)
Origin: Native
Western mountain aster (Symphyotrichum spathulatum)
Distribution: Occurring chiefly east of the Cascades crest in Washington; British Columbia south to California, east to the Rocky Mountains.
Habitat: Meadows and forest openings, moderate to mid-elevations in the mountains.
Origin: Native
Flowers: July-September
Western showy aster (Eurybia conspicua)
Distribution: Northeast Oregon and eastern Washington, east to Wyoming and north to Saskatchewan
Habitat: Open woods, foothills to mid-elevations in the mountains
Origin: Native
Flowers: July - September
Western willow aster (Symphyotrichum lanceolatum)
Origin: Native
White prairie aster (Symphyotrichum falcatum)
Origin: Native
White-topped aster (Sericocarpus rigidus)
Distribution: West of the Cascades from southern Vancouver Island, BC, to southwest Oregon, but chiefly in Washington.
Habitat: Prairies and open areas at low elevations.
Origin: Native
Flowers: July - August
Bigleaf avens (Geum macrophyllum)
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to Baja California, east to the Great Plains and east across Canada to the Atlantic Coast.
Habitat: Common in moist woods and meadows from sea level to subalpine.
Origin: Native
Flowers: April-August
Large-leaved avens (Geum macrophyllum)
Distribution: Widely distributed on both sides of the Cascades crest in Washington; Alaska to Baja California, east to the Great Plains and east across Canada to the Atlantic Coast.
Habitat: Common in moist woods and meadows from sea level to subalpine.
Origin: Native
Flowers: April-August
Purple avens (Geum rivale)
Distribution: Occurring east of the Cascades crest in the northeastern counties in Washington British Columbia to northeastern Washington, east to the Rocky Mountains, northern Great Plains, Great Lakes region and northeastern North America; circumboreal.
Habitat: Stream banks, lake shores, bogs and wet meadows from middle elevations to the subalpine.
Origin: Native
Flowers: June-August
Ross's avens (Geum rossii)
Distribution: Occurring only in the Wenatchee Mountains in Washington; Alaska and northern Canada south in Rocky and Cascades mountains to Nevada, Arizona and New Mexico; also in Far East Russia and Greenland.
Habitat: Arctic tundra, high gravelly meadows and scree slopes.
Origin: Native
Flowers: June- August
Water avens (Geum rivale)
Distribution: Occurring east of the Cascades crest in the northeastern counties in Washington British Columbia to northeastern Washington, east to the Rocky Mountains, northern Great Plains, Great Lakes region and northeastern North America; circumboreal.
Habitat: Stream banks, lake shores, bogs and wet meadows from middle elevations to the subalpine.
Origin: Native
Flowers: June-August
Yellow avens (Geum aleppicum)
Distribution: Occasional east of the Cascades, British Columbia to California, more common east of the Rockies in southern Canada.
Habitat: Along streams and in marshy or damp woods.
Origin: Native
Flowers: June - July
Alpine azalea (Kalmia procumbens)
Distribution: Known in Washington from a single collection in Skagit County; Alaska to Washington, east across Canada and eastern North America to Greenland; also in Europe and Asia.
Habitat: Alpine zone.
Origin: Native
Flowers: July-August
False azalea (Rhododendron menziesii)
Distribution: Occurring on both sides of the Cascades crest in Washington; Alaska to California, east to Alberta, Idaho, Montana, and Wyoming.
Habitat: Forest understory and edges from middle elevations to the subalpine.
Origin: Native
Flowers: April-June
Trailing azalea (Kalmia procumbens)
Distribution: Known in Washington from a single collection in Skagit County; Alaska to Washington, east across Canada and eastern North America to Greenland; also in Europe and Asia.
Habitat: Alpine zone.
Origin: Native
Flowers: July-August