Japan Flora: Stolons subterranean; radical leaves long-petioled, reniform-orbicular, 5-17 mm. long, 5-25 mm. wide, 5- to 9-toothed, slightly whitish beneath; stems erect, 5-12 cm. high, 3- to 4-angled, leafless or 1- to 2- leaved; flowers pale green; sepals spreading, broadly ovate, obtuse; stamens short; ovary inferior, embedded in the disc; capsules convex; seeds 1-ribbed, minutely mammillate. Mar.-May.

Honshu (Kanto Distr. and westw.), Shikoku, Kyushu; rather common.