云南相思树 yun nan xiang si shu

Shrubs, 4-5 m tall, pubescent throughout, generally un­armed; old branches with recurved prickles on internodes. Stip­ules deciduous, oblong; petiole with raised, elliptic gland; pin­nae 5-15 pairs, 2-5 cm; leaflets oblong, 4-10 × 1.8-2 mm, midvein close to upper margin, both surfaces sparsely pubes­cent, base obtuse-rounded, apex acute. Racemes 2-5 cm, 2- or 3-fasciculate or arranged in panicle. Calyx ca. 2.5 mm. Corolla ca. 5 mm; lobes ca. 2 mm, densely golden tomentose. Filaments ca. 1.1 cm. Ovary pubescent, with ca. 1 mm stipe; style ca. 3 mm. Legume oblong, ca. 15 × 2-3 cm, base attenuate, stalklike, apex long acuminate, slightly constricted between seeds. Seeds brown, flat. Fl. May.

● Thickets; 1700-2200 m. Sichuan, Yunnan.