澜沧宿苞豆 lan cang su bao dou

Herbs, 2-4 m. Stems twining, slender, striate, spreading villous. Leaves 3-foliolate; stipules lanceolate, 8-10 mm, per­sistent; petiole 4-7 cm; stipels small, subulate, ciliate; petiolules 3-5 mm, villous; leaflets broadly ovate-rhomboid, 4.5-8.5 × 3-7 cm, papery, both surfaces spreading villous, adaxial surface dark green, lateral veins 3-5 pairs, base cuneate, apex acumi­nate. Raceme axillary, 10-14 cm, 30-50-flowered; nodes 1-4-flowered; peduncle ca. 3 cm. Bracts linear or linear-lanceolate, 6-8 mm; pedicel ca. 3 mm; bracteoles linear, ca. 2 mm, ciliate, per­sistent. Calyx tubular; lobes 4, ovate, 1.5-2 mm, shorter than tube, uppermost longest. Corolla purple, 14-16 mm; standard obovate, with 2 auricles; wings oblong, auriculate; keel as long as wings, auriculate. Ovary villous. Legume oblong, 6-6.5 cm × 3-3.5 mm, compressed, apex beaked. Seeds ca. 11.

● Thickets; ca. 1900 m. Yunnan.

This species is known to us only from the protologue.