镰扁豆 lian bian dou

Dolichos falcatus Klein ex Willdenow; D. kosyunensis Hosokawa; D. trilobus var. kosyunensis (Hosokawa) H. Ohashi & Tateishi.

Twining herbs. Stems slender, glabrous or subglabrous. Leaves pinnately 3-foliolate; stipules ovate, ca. 3 mm, veins conspicuous; petiole 2-3 cm; stipels linear; leaflets rhombic or ovate-rhombic, 2-6 × 2-4.5 cm, glabrous or almost so on both surfaces, base broad and obtuse, apex acute or acuminate. Ra­cemes axillary, slender, 1-4-flowered; peduncles equal to or longer than petiole. Bracts and bracteoles with conspicuous veins. Calyx broadly campanulate, ca. 3 mm, glabrous; teeth triangular. Corolla white, 10-20 mm; standard orbicular, base with 2 triangular appendages, without auricles; wings obovate, slightly longer than standard; keel base truncate, clawed. Ovary sessile. Legumes linear-oblong, ca. 6 × 0.8 cm, slightly curved, compressed. Seeds 6 or 7. Fl. Oct-Mar.

Thickets. Hainan, Taiwan [tropical Africa and Asia].