Symphyotrichum
aster
20 species
4 subspecies and varieties
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Symphyotrichum ×amethystinumamethyst aster, hybrid aster
Origin: Introduced
Symphyotrichum ascendensintermountain aster, long leaved aster, long-leaved aster, western American aster, western aster
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
Symphyotrichum borealenorthern bog aster, rush aster, slender white aster
Distribution: Alaska south to Idaho, east to Minnesota; rare in the Pacific Northwest.
Habitat: Cold bogs.
Origin: Native
Flowers: July - September
Symphyotrichum bracteolatumbracted aster, Eaton's aster, Oregon aster
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
Symphyotrichum campestrewestern meadow aster, Western meadow aster
Origin: Native
Symphyotrichum chilensecommon California aster, Pacific aster
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
Symphyotrichum ciliatumalkali American aster, rayless alkali aster, rayless annual aster
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
Symphyotrichum ×columbianumhybrid aster
Origin: Native
Symphyotrichum ericoidesheath-leaved aster, tufted white prairie aster
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
var. pansum – little gray aster, tufted white prairie aster, white heath aster
Symphyotrichum falcatumrough white prairie aster, western heath aster
Origin: Native
Symphyotrichum foliaceumalpine leafybract aster, Canby's leafybract aster, Cusick's American aster, Cusick's aster, Henderson's aster, Kootenai aster, leafy aster, leafy-bracted aster, Parry's aster
Distribution: Alaska to California, east to Colorado
Habitat: Open, usually moist areas, low to high elevations in the mountains.
Origin: Native
Flowers: July-September
Symphyotrichum frondosumalkali aster, short rayed aster, short-rayed alkali aster
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
Symphyotrichum halliiHall's aster
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
Symphyotrichum jessicaeJessica's aster, Palouse aster
Distribution: The Palouse country of southeast Washington and adjacent Idaho.
Habitat: Streambanks and open places.
Origin: Native
Flowers: July - September
Symphyotrichum laeveGeyer's aster, smooth aster
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
var. geyeri – smooth aster
Symphyotrichum lanceolatummarsh aster, western willow aster
Origin: Native
var. hesperium – lance-leaved aster, panicled aster, white panicled aster
Symphyotrichum novae-angliaeNew England aster
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
Symphyotrichum pilosumhairy aster
Habitat: River cobbles, gravel, disturbed ground, and railroads.
Origin: Introduced
Flowers: August-September
var. pilosum – hairy aster
Symphyotrichum spathulatumwestern aster, western mountain aster, Western mountain aster
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
Symphyotrichum subspicatumDouglas' aster, Douglas's aster
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