Japan flora: Glaucescent glabrous annual; stems simple or branched at base, quadrangular, 30-50 cm. long; leaves broadly linear to lanceo¬late, 3-5 cm. long, 3-6 mm. wide, acute, auriculate and sessile at base, entire; flowers few, in dense axillary fascicles, the pedicels less than 1 mm. long; calyx about 2.5 mm. long, short-tubulose at anthesis, hemispherical, 3-4 mm. long in fruit, whitish with green nerves, teeth short, green; petals minute, purplish, obovate; stamens slightly exserted; capsules globose, not exserted from the calyx, 3.5-4 mm. across; styles about 1.5 mm. long. Kyushu (Hizen Prov.);

introduced. N. and S. America, Philippines, Micronesia, and Ryukyus.