长果猪屎豆 chang guo zhu shi dou

Herbs, 50-100 cm tall. Branches terete, pilose when young but glabrescent. Stipules absent. Leaves 3-foliolate; peti­ole 3-6 cm; petiolules 1-2 mm; leaflet blades linear to linear-lanceolate, 5-9(-12) × 0.5-1 cm, both surfaces sparsely pilose or glabrous, base cuneate, apex acuminate and mucronate. Ra­cemes terminal, to 20 cm, 10-40-flowered; bracts subulate to filiform, 0.5-3 mm, expanded at base. Pedicel 3-5 mm; brac­teoles normally inserted at base of calyx or rarely on pedicel, narrow, 0.3-1 mm. Calyx subcampanulate, ca. 3 mm, 5-lobed, pubescent; lobes triangular, shorter than tube. Corolla yellow, exserted beyond calyx; standard broadly elliptic to orbicular, ca. 1 cm in diam., base with 2 appendages; wings oblong, ca. 1 cm, marginally pilose at base; keel ± as long as wings, apical half rounded, marginally pubescent at base, beak long. Ovary sub­sessile. Legume oblong, 2-3 × 0.5-1 cm, many seeded, gla­brous. Seeds obliquely cordate. Fl. Jun-Aug, fr. Sep-Nov.

Grasslands, along trails; to ca. 900 m. Cultivated or naturalized in Fujian, Taiwan, and Yunnan [native to Africa and Madagascar].

This species is adventive in North and South America.