斜叶黄檀 xie ye huang tan

Derris pinnata Loureiro, Fl. Cochinch. 2: 432. 1790; Dal­bergia tamarindifolia Roxburgh.

Trees or sometimes shrubby climbers. Branches long, flexuose; young branchlets puberulent. Leaves 12-15 cm; ra­chis and petioles densely puberulent as short petiolules; stipules lanceolate, ca. 5 mm, puberulent; leaflets 21-42, trapezoid-oblong, small, 12-18 × 5-7.5 mm, firmly papery, both surfaces puberulent, at length abaxially glaucous, adaxially glabrescent, base asymmetric, apex rounded, slightly emarginate. Panicles axillary, congested, with corymblike branches, 1.5-5 × 1.2-2.5 cm; peduncles short, as branches and pedicels densely puber­ulent; bracts and bracteoles persistent, ovate, puberulent. Flow­ers small, ca. 6 mm. Calyx campanulate, ca. 3 mm, outside puberulent or glabrescent; teeth ovate, upper 2 subconnate. Corolla white; petals long clawed; standard reflexed, ovate; wings with sagittate base; keel united above, blade hastate on upper side below. Stamens 9 or 10, monadelphous. Ovary stip­itate, glabrous; ovules 2 or 3. Legume brown and shiny when dry, oblong-ligulate, thin, 2.5-6 × 1-1.4 cm, glabrous, uni­formly finely reticulate, base attenuate to long slender stipe, acute, 1-4-seeded. Seeds narrow, ca. 18 × 4 mm. Fl. Jan-Apr, fr. May-Jul.

Dense forests; below 1400 m. Guangxi, Hainan, Xizang, Yunnan [Indonesia (Java), Laos, Malaysia, Myanmar, Philippines, Thailand, Vietnam].