Japan Flora: Glabrous perennial herb; stems erect, usually simple, 60-100 cm. long; leaves lanceolate, 7-12 cm. long, 1-2.5 cm. wide, acuminate, mucronate-toothed, sometimes incised, slightly glaucous beneath, sessile; inflorescence a corymb; heads few to rather many, 3-3.5 cm. across, blue-purple; involucres 12-15 mm. long, the inner bracts about 15, the outer ones unequal; achenes lanceolate, scarcely beaked, ribbed, smooth; pappus white, about 1 cm. long. July-Aug.
Hokkaido. Kuriles, Sakhalin, n. Korea, Siberia, and Europe.