Description from Flora of China
Annuals, ca. 60 cm tall. Stems erect, slender, with white appressed hairs, apically branched. Leaves mostly all deciduous in fruit, sessile, linear-elliptic, 5-15 X 2-4 mm, glabrous, margin callous thickened and with several pointed teeth on each side. Bracts similar to leaves in shape. Pedicel slender, straight or slightly arching, 5-10 mm, slightly more elongated in fruit, with same hairs as stems. Calyx 3-5 mm; lobes ovate-triangular, margin scabrous. Corolla white, 5-6 mm, pubescent externally. Capsule oblong, compressed, as long as calyx, hirsute, apex obtuse. Seeds ellipsoid, ca. 1 mm. Fl. Jun-Sep.
Moist places; 300-400 m. Beijing Shi (Miaofeng Shan), Hebei (Xiaowutai Shan), Heilongjiang, Jilin, Liaoning, E Nei Mongol [Korea, Russia (Far East)].