大龙骨野豌豆 da long gu ye wan dou

Ervum megalotropis (Ledebour) Trautvetter; Vicia humilis Rong He (1994), not Kunth (1824); V. megalotropis f. steno­phylla Franchet.

Herbs perennial, erect, 50-80 cm tall. Leaves paripinnate; stipules lanceolate or semihastate, 5-8 mm, margin 1- or 2-toothed proximally; leaflets 7-12-paired, linear to lanceolate, 20-35(-40) × 1.5-4(-6) mm, appressed hairy, apex obtuse or acute; lateral veins dense; tendril branched, 1-3 cm. Raceme subequaling leaf, densely 10-20-flowered. Calyx campanulate; lower tooth longer. Corolla purple-red, 12-15 mm; standard longer than wings and keel. Legume rhomboid or oblong, 20-25 × ca. 5 mm. Seeds 3-6. Fl. and fr. Mar-Jul. 2n = 14.

Rocky or sandy land; 600-1000 m. Gansu, Hebei, Shaanxi, Si­chuan, Xinjiang [Kazakhstan, Mongolia, Russia (Siberia)].