Japan Flora: Stems elongate; leaves thin, deltoid-cordate, or sometimes lanceolate with the basal margins prominendy auriculate, glabrous, 5-10 cm. long, 2.5-7 cm. wide, long-acuminate, sometimes with minute papillae on the nerves beneath, entire, the petioles usually with a small auriclelike appendage at base; inflorescence pendulous, the staminate flowers loose, slenderly pedicelled, the tepals entire, slightly recurved on margin; capsules orbicular, somewhat angular; seeds wing-margined. July-Aug.

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