头序歪头菜 tou xu wai tou cai

Orobus ohwianus (Hosokawa) Stankevicz & Roskov; Vicia unijuga A. Braun var. apoda Maximowicz; V. unijuga var. oh­wiana (Hosokawa) Nakai.

Herbs perennial, ca. 70 cm tall. Stem erect, unbranched or few branched, puberulent. Leaves subsessile, paripinnate; stip­ules ovate-lanceolate, margin entire; leaflets 1-paired, broadly ovate to subrhomboid, 40-70(-100) × 35-50(-170) mm, gla­brous or pilose at margin and along veins, apex acute; tendril absent, replaced by a mucro. Raceme abbreviated to capitate, shorter than leaf, densely flowered. Calyx campanulate, 8-10 mm, villous. Corolla purple, rarely white; standard oblong-obo­vate, 10-14 mm, equaling wings and longer than keel. Legume obliquely oblong, 25-30 × ca. 5 mm, glabrous, apex beaked. Fl. and fr. Jul-Sep. 2n = 12, 24.

Forests, forest margins, bush woods, among shrubs, hill slopes, sunny slopes, grasslands, meadows; below 4000 m. Hebei, Heilong­jiang, Henan, Jilin, Liaoning, Shaanxi, Shandong, Shanxi [Japan, Korea, Russia (Far East, Siberia)].