32. Crotalaria yunnanensis Franchet, Pl. Delavay. 151. 1889.
云南猪屎豆 yun nan zhu shi dou
Herbs, perennial, erect, 15-70 cm tall. Stems few branched, coarsely spreading pilose. Stipules absent. Leaves simple; petiole ca. 1.5 mm; leaf blade oblong to elliptic, 2-6 × 0.5-2.5 cm, both surfaces sparsely brown pilose but abaxially more densely so on midvein, veins abaxially raised, base slightly cuneate, apex obtuse to acuminate and mucronate. Racemes terminal, 5-20 cm, 5-30-flowered; bracts linear, 2-9 mm. Pedicel ± as long as or shorter than bract; bracteoles inserted at base of calyx tube, pilose. Calyx 2-lipped, 5-10 mm, densely brown pilose; lobes lanceolate. Corolla yellow; standard suborbicular, 0.9-1.1 cm in diam., base with 2 appendages; wings obovate-oblong, 7-10 mm; keel ± as long as wings, rounded, narrowed apically from middle and extended into a long twisted beak. Legume cylindric, ca. 1 cm, glabrous. Fl. May-Aug, fr. Aug-Oct.
● Open grasslands, thickets, Pinus-Quercus forests; 100-3000 m. Sichuan, Yunnan.