Trees, 8-15 m tall. Trunk to 27 cm d.b.h., bark dark gray-brown. Young branchlets dark brown to black, rusty pubescent, lenticels scattered. Petiole 2-3.5 cm, moderately stout, glabrous or pubescent; leaf blade broadly ovate-orbicular, 6-12.5 × 6.5-10.5 cm, abaxially puberulent especially on principal veins, adaxially glabrous, principal veins 5, raised abaxially, reticulate veins conspicuous on both surfaces, base truncate or shallowly cordate, apex acute, slightly attenuate. Racemes solitary, pendulous, 2-10 cm, 6-20-flowered; peduncle and rachis hairy. Flowers 1-1.2 cm; pedicel 0.8-1 cm, slender. Calyx ca. 5 mm. Petals rose-red; standard tinged with deep reddish spots. Stamens included; filaments hairy at base. Legume slightly curved, compressed, oblong, 5-10 × 1.2-1.8 cm, wing 2-2.5 mm wide, dorsal and ventral sutures subequal in length, basally attenuate, apex acute, with a beak 5-7 mm; stipe 3.5-4 mm; fruiting pedicel 1.3-1.5 cm. Seeds 2-9, compressed. Fl. May, fr. Oct.
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