Japan Flora: Deep green perennial herb; stems slender, slightly branched, elongate, creeping prostrate, 10-30 cm. long, minutely puberulous, brownish green; leaves obliquely obovate, auriculate-rounded on outer margin at base, pale green, minutely puberulent on nerves beneath, the petioles very short; staminate glomerules cymose, the peduncles 1-1.5 cm. long, puberulous; pistillate glomerules sessile, densely flowered, small, the perianth-seg-ments linear; achenes elliptic, pale, about 0.7 mm. long, prominently raised punctate. Apr.-June. Woods;

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