Japan Flora: Nearly glabrous perennial with soft white ascending rhizomes and subterranean slender naked stolons; stems simple or branched, 50-100 cm. long, erect; radical leaves few, linearJanceolate, 15-50 cm. long, 1-3 cm. wide, acuminate, loosely toothed or mucronate-toothed, glaucous beneath; cauline leaves similar, narrow, elongate, ses­sile, the upper filiform-linear, small; peduncles 3.5-10 cm. long; heads loosely arranged, 3-3.5 cm. across, yellow, 10-30- flowered； involucres about 12 mm. long, the outer bracts lance­olate to narrowly deltoid, acute; achenes linear, 4-angled, 7.5-9 mm. long, about  mm. wide; pappus about 6 mm. long, pale brown. Oct.-Nov. Wet boggy places.

Honshu (Tokaidd, Kinki Distr. and westw.), Shikoku, Kyushu.