Japan Flora: Glabrous annual; stems branched at base, 8-20 cm. long; leaves oblanceolate to broadly so, 2-4 cm. long, 5-10 mm. wide, ob­tuse or subacute, gradually narrowed to the base, sessile, ob­tusely toothed; racemes loose, terminal, leafy at base, abruptly linear-bracteate in upper part, the pedicels thick and spread­ing, nearly as long as the capsules; calyx 5-6 mm. long, the segments linear, scarious on mar먼n; corolla rose-purple, about 1 cm. long; fertile stamens 2, the anthers without appendages; capsules linear, 2-2.5 times as long as the calyx. Aug.-Oct. Wet places in lowlands.

Honshu, Shikoku, Kyushu. Ryukyus, Formosa, India and Malaysia.