Japan Flora: Leaves lanceo­late to oblanceolate, 20-30 cm. long, 3-5 cm. wide, obtuse or subacute, pinnately parted to cleft; scapes usually longer, rarely shorter than the leaves at anthesis, glabrous, white-pubescent under the head; heads 3.5-4.5 cm. across; involucres 17-20 mm. long at anthesis, the outer bracts narrowly ovate-oblong, ascending, prominently corniculate; achenes narrowly obovoid- oblong, pale yellow-brown, with spinelike tubercles on upper part and warty tubercles below except at the base, slightly flattened, about 4 mm. long.  

Honshu (Kanto, Tokaido, Kinki, and Chugoku Distr.), Shikoku, Kyushu.

f. sulphureum (H. Koidz.) Kitam. Corollas pale yellow. Honshu (Chugokn Distr.), Kyushu.