Japan Flora: Dioecious perennial; rhizomes creeping, fleshy, 4-7 mm. in diameter; stems relatively stout, 7- to 11-leaved, glabrous or scattered pilose above; leaves oblong, rounded at the base, short-petioled, 7-20 cm. long, 2.5-8 cm. wide, glabrous above, scattered pilose beneath; staminate inflorescence a many-flowered panicle, the pistillate a simple raceme or with 1 or 2 short branches below, the axis often glabrous and angled; tepals twice as long as the stamens, greenish in anthesis, in the pistillate flowers changing to purple-brown in fruit; style very short, the stigma-lobes lanceolate, recurved and appressed to the ovaryJune-July. Damp coniferous woods;

Honshu (centr. and n. distr,), also reported from Hokkaido.