杂性治疝草 za xing zhi shan cao

Plants annual, pubescent. Stems spreading, 3--15 cm. Petiole short; leaf blade oblong-elliptic, 3--10 × 1--3 mm, base attenuate, apex obtuse. Glomerules leaf-opposed, (6--)10--12- or more flowered. Flowers 4-merous, 1.4--1.5(--1.7) mm. Sepals lanceolate, ca. 1.5 × 0.5 mm, abaxially hairy, apex apiculate. Stamens 4, shorter than sepals. Style (0.3--)0.5 mm, often longer than sepals at maturity, divided for ca. 1/3 length. Achene ovoid, subequaling calyx. Fl. Jul--Aug, fr. Aug--Sep.

Steppes, riverside grasslands; ca. 500 m. Xinjiang [Russia; E Europe].