Japan Flora: Green erect perennial 40-80 cm. high, the stems slightly retrorsely puberulent; leaves petiolate, broadly ovate or orbicular, 8-20 cm. long, 5-15 cm. wide, more or less pilose on both surfaces, the stipules small; staminate inflorescence paniculate, 5-10 cm. long, puberulous, the pisriHate spicate, nearly terminal on the stems, peduncled, 20-30 cm. long, ascending, puberulous, the glomerules rather loosely several-flowered, the 2 lateral perianth-segments obliquely ovate, obtuse, puberulous, nearly as long as the achene, ac-crescent after anthesis; achenes obliquely elliptic, flat，1.7-1.8 mm. long, smooth. Woods in mountains;

Hokkaido, Honshu.