Distribution: Widely distributed on both sides of the Cascades crest in Washington; Yukon Territory to California, east to the Atlantic Coast.
Habitat: Moist, open forests at low to mid-elevations.
Flowers: April-August
Origin: Native
Growth Duration: Biennial, Perennial
Conservation Status: Not of concern
Pollination: Bees, butterflies, flies, apomixis?
Biennial or short-lived perennial, fibrous rooted, 2-7 dm. tall; herbage usually with long, spreading hairs.
Basal leaves oblanceolate, toothed or lobed to sometimes entire, up to 15 cm. long and 3 cm. wide; cauline leaves becoming sessile, mostly ample and clasping.
Heads 1-many; involucre 4-6 mm. high; rays pistillate, 150-400, 0.2-0.6 mm. wide, 5-10 mm. long, deep pink to white; disk corollas 2.5-3.2 mm. long, yellow; pappus of 20-30 fragile bristles.
Publication: Sp. Pl. 2: 863. 1753.
- var. glaber – smooth Philadelphia fleabane Occurring west of the Cascades crest in Washington along the Lower Columbia River; southwestern British Columbia to northwestern Oregon.
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var. philadelphicus – Philadelphia fleabane
Widely distributed on both sides of the Cascades crest in Washington; Yukon Territory to California, east to the Atlantic Coast.
PNW Herbaria: Specimen records of Erigeron philadelphicus in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Erigeron philadelphicus checklist entry
OregonFlora: Erigeron philadelphicus information
E-Flora BC: Erigeron philadelphicus atlas page
CalPhotos: Erigeron philadelphicus photos
