Japan Flora: Glabrous annual; stems much-branched, erect, 30-50 cm. long; leaves narrowly linear, acute or subacute, 1-3 cm. long; inflorescence in 3- to 5-flowered axillary fascicles, the flowers small, sessile; perianth-segments 5, elliptic, not accrescent in fruit; utricles 1.2-1.5 mm. across, depressed-globose; seeds black, shining, discoid or lenticular, about 1 mm. across. Sept.-Oct. Sandy seashores;
Honshu (Kanto Distr. and westw.), Shikoku, Kyushu. Along sea shores in the N. Hemisphere.