Japan Flora: Perennial; stem terete, erect from long-creeping slender rhizomes, 30-80 cm. long, rather stout; leaves about 10, loosely alternate, flat, nar­rowly oblong to broadly oblanceolate, 20-30 cm. long, 3-6 cm. wide, acute at both ends, scabrous above, sparsely puberulent beneath, the lower ones reduced to a sheath; peduncles erect, 10-30 cm. long, white-puberulent; inflorescence 5-15 cm. long, the pedicels about 4 mm. long, the bracts narrowly ovate, thinly membranous, acute; flowers white, about 7 mm. across, with 6 perfect stamens; fruit about 5 mm. in diameter; Aug.-Sept.

Honshu (Kanto Distr. and westw.), Shikoku, Kyushu. Ryukyus.