UW Burke Herbarium species comparison

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Symphyotrichum foliaceum

Symphyotrichum pilosum

alpine 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

hairy aster
Habit Fibrous-rooted perennial from a creeping rhizome, highly variable in size, the herbage glabrous or soft-pubescent.
Leaves

Leaves entire, the lower oblanceolate to obovate, petiolate, often deciduous; other leaves lanceolate to ovate, sessile, 5-12 cm. long and 1-4 cm. wide, 3.5-7 times as long as wide.

Flowers

Heads 1-many in a flat-topped inflorescence;

involucre bracts leafy, imbricate, white-margined at the base;

disk flowers numerous, yellow;

rays 15-60, 1-2 cm. long, pistillate, rose-purple to blue or violet;

pappus of numerous capillary bristles, white or tawny.

Fruits

Fruit an achene.

Symphyotrichum foliaceum

Symphyotrichum pilosum
Flowering time July-September August-October
Habitat Open, usually moist areas, low to high elevations in the mountains. River cobbles, gravel, disturbed ground, and railroads.
Distribution
Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to the Rocky Mountains.
[WildflowerSearch map]
[BONAP county map]
Occurring in scattered locations east of the Cascades crest in Washington; southwestern British Columbia to Washington, otherwise native from the U.S. Great Plains east to the Atlantic Coast.
[WildflowerSearch map]
[BONAP county map]
Origin Native Introduced from central and eastern North America
Conservation status Not of concern Not of concern
Sibling taxa
S. ×amethystinum, S. ascendens, S. boreale, S. bracteolatum, S. campestre, S. chilense, S. ciliatum, S. ×columbianum, S. ericoides, S. frondosum, S. hallii, S. jessicae, S. laeve, S. lanceolatum, S. novae-angliae, S. pilosum, S. spathulatum, S. subspicatum
S. ×amethystinum, S. ascendens, S. boreale, S. bracteolatum, S. campestre, S. chilense, S. ciliatum, S. ×columbianum, S. ericoides, S. foliaceum, S. frondosum, S. hallii, S. jessicae, S. laeve, S. lanceolatum, S. novae-angliae, S. spathulatum, S. subspicatum
Subordinate taxa
S. pilosum var. pilosum
Web links 
Unless otherwise noted, all data comes from the University of Washington's Burke Herbarium.



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