16. Crotalaria retusa Linnaeus, Sp. Pl. 2: 715. 1753.
吊裙草 diao qun cao
Lupinus cochinchinensis Loureiro.
Herbs, erect, 60-120 cm tall. Branches terete, pubescent. Stipules subulate, ca. 1 mm. Leaves simple; petiole 2-4 mm; leaf blade oblong to oblanceolate, 3-8 × 1-3.5 cm, abaxially slightly pubescent, adaxially glabrous, veins distinct on both surfaces, base cuneate, apex retuse. Racemes terminal, 10-20-flowered; bracts lanceolate, 2-3 mm. Pedicel 3-5 mm; bracteoles inserted on apical part of pedicel, filiform, very minute. Calyx 2-lipped, 1-1.2 cm, sparsely pubescent; lobes broadly lanceolate. Corolla yellow; standard suborbicular to elliptic, 1-1.5 cm, base with 2 appendages; wings oblong, 1-1.5 cm; keel ± as long as wings, narrowed apically from middle and extended into a long twisted beak exserted beyond calyx. Legume oblong, 3-4 × 1-1.8 cm, 10-20-seeded, glabrous; stipe ca. 2 mm. Fl. Oct-Dec, fr. Jan-Apr.
Montane grasslands, seashore sandy areas. Guangdong, Hainan [Bangladesh, Bhutan, Cambodia, India, Laos, Malaysia, Myanmar, Nepal, Pakistan, Philippines, Sri Lanka, Thailand, Vietnam; Africa, tropical America, SW Asia, Pacific islands].
This species is cultivated in Hunan. It is toxic to livestock.