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.
Flowers: May-August
Origin: Native
Growth Duration: Perennial
Conservation Status: Not of concern
Pollination: Bees, flies, beetles
Scapose, stout perennial, 2-7 dm. tall, somewhat hairy when young, the juice milky.
Leaves all basal, oblanceolate to broadly linear, entire to deeply pinnatifid, 10-25 cm. long and 1-3 cm. wide.
Head solitary, large and many-flowered; involucre 1.5-4 cm. high, its outer bracts broad and short, the inner narrower and elongate; corollas all ligulate, yellow.
Achene body 4-7 mm. long, tapering to a slender beak 2-4 times as long.
Publication: Pittonia. 2: 178. 1891.
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var. grandiflora – large flowered agoseris, large flower goat-chicory
Occurring on both sides of the Cascades crest in Washington; British Columbia to California, east to Montana, Idaho and Nevada. -
var. leptophylla – Puget Sound agoseris Occurring chiefly west of the Cascades crest in Washington and in the Columbia River Gorge. British Columbia to California to Idaho.
PNW Herbaria: Specimen records of Agoseris grandiflora in the Consortium of Pacific Northwest Herbaria database
WA Flora Checklist: Agoseris grandiflora checklist entry
OregonFlora: Agoseris grandiflora information
E-Flora BC: Agoseris grandiflora atlas page
CalPhotos: Agoseris grandiflora photos
