Japan Flora: Delicate glabrous annual; stems much-branched, 10-30 cm. long, ascending to diffuse, angled; leaves in verticils of 3-5, slightly lustrous above, lanceolate to oblanceolate, 1.5-3 cm. long, 3-7 mm. wide, obtuse to subacute, acute at base, entire, 1-nerved; inflorescence loosely flowered, the bracts delicate, membranous, the pedicels 1-4 mm. long; sepals 5, elliptic, ob-tuse to rounded, obsoletely 1-nerved, about 1.5 mm. long; capsules globose, about 2 mm. long; seeds rather numerous, dark brown, nearly lusterless, reniform-orbicular, flat, about 0.5 mm. across, minutely warty. July-Oct Waste ground and cultivated fields;

Honshu, Shikoku, Kyushu; common in lowlands and hills. China, Malay Peninsula, and India.