云南羊蹄甲 yun nan yang ti jia

Bauhinia altefissa H. Léveillé, p.p.; B. diptera Collett & Hemsley (1890), not Blume ex Miquel (1850); Lasiobema yunnanensis (Franchet) A. Schmitz.

Lianas, woody, slender, glabrous. Branches angulate or cylindric; tendrils in pairs, subglabrous. Leaves 2-foliolate; stip­ules caducous; petiole 1.5-2.5 cm; leaf blade broadly elliptic, membranous or papery, both surfaces glabrous, primary veins 3 or 4 per lobe, base deeply or shallowly cordate, apex bifid to upper pulvinus with a free mucro; lobes obliquely ovate, 2-4.5 × 1-2.5 cm, apex obtuse or rounded. Inflorescence a raceme, terminal or opposite to leaves, 8-18 cm, 10-20-flowered; bracts caducous; bracteoles inserted at middle of pedicel. Pedicel 2-3 cm. Flower buds narrowly ellipsoid. Receptacle cylindric, 7-8 mm; calyx lobes split into 2 parts upon anthesis, cucullate, elliptic-ovate, with teeth at apex. Petals pinkish, with dark red stripes on veins, spatulate, ca. 17 mm, subglabrous, clawed. Fertile stamens 3; filaments curved, pinkish; anthers ovoid. Staminodes 7, much reduced. Ovary glabrous, prominently stalked; style slender; stigma capitate. Legume linear-oblong, 8-15 × 1.5-2 cm, apex beaked; valves leathery. Seeds broadly elliptic-oblong, compressed, 7-9 mm; testa blackish, shiny. Fl. Aug, fr. Oct.

Thickets on hills; 400-2000 m. Guizhou, Sichuan, Yunnan [Myanmar, N Thailand].