托叶黄檀 tuo ye huang tan

Woody climbers, large, sometimes small trees. Bark brown; branches spreading. Leaves 15-20 cm; stipules early caducous, ovate-lanceolate to lanceolate, membranous; leaflets 17-21; petiolules 1.5-2 mm; blades oblong to obovate-oblong, 2.8-3.5 × 1-1.2(-2) cm, lowest sometimes elliptic, 1.2-1.5 × ca. 1 cm, thinly papery, abaxially sparsely appressed puberu­lent, adaxially glabrous, base broadly cuneate or rounded, apex acute, ultimately rounded or obtuse, sometimes emarginate. Panicles in axils of leaves, which at apex of branchlets rise among clustered, scalelike, early-deciduous bracts; peduncle, rachis, branches, and bracts appressed brown pubescent, lower part of inflorescence with many scattered, ovate, membranous, empty bracts. Bracts of flowers smaller than inflorescence bracts; bracteoles obovate, enclosing ca. 2/3 of calyx. Calyx campanulate, puberulent; teeth ovate, shorter than tube except lowest ca. as long as tube. Corolla pale blue or pale purplish red; petals distinctly clawed; standard orbicular, slightly emar­ginate; wings with downward auricles on upper side below. Stamens 10, diadelphous (5+5). Ovary glabrous except for pubescent long stipe, 1(or 2)-ovuled; style slender; stigma small. Legume broadly ligulate to ovoid or elliptic, (6.5-)9-11 × 3.2(-4) cm, firmly leathery, glabrous, not veined except sometimes opposite seed where mesocarp is much thickened, base cuneate or rounded, apex obtuse or rounded, 1-seeded, very rarely 2-seeded. Seeds reniform, ca. 15 × 8 mm. Fl. Apr-May, fr. Aug-Jan.

Open forests, ravines to mountain summits; 700-1700 m. Yunnan [Cambodia, NE India, Laos, Malaysia, Myanmar, Thailand, Vietnam].