腺药豇豆 xian yao jiang dou

Phaseolus adenanthus G. Meyer, Prim. Fl. Esseq. 239. 1818.

Perennial herbs, twining. Stipules truncate at base and not produced below point of insertion, lanceolate, 3-5 mm; petiole 3.5-5(-9) cm; terminal leaflet rhomboid-ovate, 7-8 × 5-6.5 cm, nearly glabrous, base obtuse, apex acute; lateral leaflets some­what oblique. Racemes axillary, 9-17 cm including peduncle; pedicels 2-3 mm. Bracteoles ovate, ca. 4 mm, caducous. Calyx lobes acuminate. Corolla purple, 1.8-3 cm; standard orbicular; wings oblong, inconspicuously auriculate; keel spirally incurved for ca. 3 turns. Ovary glabrous. Legumes linear, 9-14 × 0.8-1.4 cm, glabrous, 11-15-seeded. Seeds dark brown, reniform, ca. 7 × 5 mm.

At roadsides. Taiwan [pantropical].