Japan Flora: Glabrous annual or biennial; stems simple or branched from the base, 4-angled, purplish; radical leaves small, oblanceolate, the cauline linear or broadly so, rarely linear-oblanceolate, 1.5-3.5 cm. long, 1-3 mm. wide, acute or subobtuse, the margins revolute; flowers in dense ter­minal panicles, 5-merous; calyx-segments linear to linear-lance­olate, 1/2-2/3 as long as the corolla; corolla-lobes broadly lanceolate, 12-17 mm. long, white, with purple nerves, the glandular-grooves in pairs, with long fleshy hairs on margin; capsules slightly longer than the corolla, lanceolate; seeds nearly smooth, subglobose. Aug.-Oct. Sunny slopes and thickets in lowlands and hills;

Hokkaido, Honshu, Shikoku, Kyushu; rather common. Korea, and China.