Japan Flora: Green or yellow-green annual with pale white glandular-hairs, not farinose; stems much-branched, ascending, 60-80 cm. long; leaves narrowly ovate to lanceolate, 2-5 cm. long, 5-15 mm. wide, acute to obtuse, undulate to sinuate, short-petioled; spikes leafy, short or elongate; flowers small; sepals usually 3, about 0.8 mm. long, green; seeds horizontal or vertical, shining, thick-lenticular, about 0.6 mm. across. July-Nov. Naturalized in Honshu, Shikoku, Kyushu; common in waste ground and along roadsides；

Tropical America.