Lianas, 1-2 m. Stems dark brown, terete, slender, soft. Branchlets yellow pubescent when young, glabrescent. Leaves 7-foliolate; rachis 10-20 cm, including petiole 2-4 cm; leaflet blades linear-lanceolate, 4-8 × 1-2 cm with terminal one largest, papery, both surfaces slightly shiny and blackened when dry, base rounded to cordate, apex acuminate to caudate. Racemes axillary, 5-7 cm, shorter than subtending leaf, yellow tomentose. Flowers ca. 1.8 cm. Calyx ca. 8 mm, hirsute. Corolla yellow; standard broadly ovate, glabrous, with 2 basal calluses. Ovary stipitate, tomentose, with numerous ovules. Legume linear, 10-12 × ca. 1 cm, flat, brown tomentose, apex cuspidate. Seeds 4-8 per legume, brown, ovoid, ca. 7 × 6 mm, smooth. Fl. Jun-Oct, fr. Oct-Jan.
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