长圆叶山黑豆 chang yuan ye shan hei dou

Basionym: Rhynchosia henryi Hemsley, J. Linn. Soc., Bot. 23: 196. 1887; Dumasia oblongifoliolata F. T. Wang & Tang ex Y. T. Wei & S. K. Lee.

Herbs perennial, twining, all parts except leaves densely gray pubescent. Stipules coniform, ca. 2 mm; petiole 1.5-4 cm; stipels coniform, ca. 1 mm; petiolules ca. 1 mm; leaflets papery, oblong or oblong-ovate, 3-5 × 1-2.3 cm, abaxial surface densely gray adpressed hairy, adaxial surface glabrous, lateral veins 4-7 per side, base rounded, sometimes slightly oblique, apex rounded, slightly emarginate, with small mucro. Raceme axillary, 2-4 cm; peduncle densely gray pubescent. Flowers ca. 1.5 cm; bracts and bracteoles extremely short, ca. 1 mm, per­sistent; pedicel ca. 1 mm. Calyx 6-8 mm, densely adpressed pubescent. Corolla yellow; petals subequal; standard broadly oblong to obovate; wings oblong, with claw; keels elliptic, slightly curved. Fl. Oct.

● Hubei, Sichuan.