Japan Flora: Glabrous, smooth or loosely papil lose annual with erect branched stems 10-40 cm. long; leaves broadly linear to linear-lanceolate, 1.5-3 cm. long, 2-4 mm. wide, obtuse or subacute, rather thick, gradually decurrent toward the sessile or short-petioled base; inflorescence rather large, densely flowered while young, more expanded and rather loose in fruit, pale green, the branchlets 2-4 mm. long, short-spinose; sepals oblong, about 0.5 mm. long, obtuse, green on back, rather broadly white-membranous on margin; seeds horizontal, discoid, black, about 0.5 mm. across, the embryo imperfectly annular. July-Aug.

Honshu (centr. distr.) rare. Korea, s. China, and s. Siberia.