大托叶山黧豆 da tuo ye shan li dou

Herbs perennial, to 2 m tall. Stem erect, glabrous, winged. Leaves with branched tendril at apex; stipules large, ovate or elliptic, 35-65 mm, glabrous, often with dentate basal lobe; leaflets 3-5-paired, narrowly ovate, ovate-lanceolate, or elliptic-lanceolate, 55-90 × 20-30 mm, glabrous, with subparallel veins. Raceme 8-14-flowered. Calyx campanulate, ca. 12 mm, gla­brous, unequally toothed. Corolla red-purple; standard ca. 13 mm, retuse at apex, often with darker venation; wings auricu­late at base; keels ca. 12 mm. Ovary linear, glabrous. Legume dark brown, ca. 4.5 × 5.5 mm. Seeds light yellow, oblate-spherical, smooth. Fl. May-Jun, fr. Jul-Aug.

Forests, valleys, riverbanks; 1100-1500 m. Xinjiang [Russia; C and E Europe].