Distribution: The Palouse country of southeast Washington and adjacent Idaho.
Habitat: Streambanks and open places.
Flowers: July - September
Conservation Status: Endangered in Washington (WANHP)
Stout perennial from a rhizome, 4-12 dm. tall, the herbage densely soft-pubescent.
Leaves ample, the lower abruptly petiolate, often deciduous; other leaves broadly lanceolate or ovate, sessile, 6-13 cm. long and 1.5-3.5 cm. wide.
Inflorescence a panicle, the heads numerous; involucre 7-10 mm. high, the bracts pubescent, imbricate; disk flowers numerous, yellow; rays 18-30, bluish, 12-20 mm. long; pappus of numerous tawny, capillary bristles.