Slender twining vine; stems pilose with long weak yellowish hairs, drying grooved. Leaves pinnate trifoliolate; leaflets narrowly ovate to oblong lanceolate, mostly 5-8 cm long, 1-3 cm wide, apically acute or slightly and gradually acu-minate, mucronate, basally rounded, glabrate but mostly ciliolate on the margins and costa; petiolules ca. 2 mm long, densely pilose; petioles shorter than the leaves, drying angled, pilose as the stems; stipels ovate, glabrous, ca. 2 mm long; stipules acute, ca. 6 mm long, produced ca. 3 mm below the point of insertion, ciliate. Inflorescences contracted pseudoracemes on elongate, erect axillary pe-duncles, peduncles 3-20 cm long, sparingly long pilose, drying angled; bracteoles and bracts subulate, caducous; pedicels shorter than the calyx in flower, some-what longer in fruit. Flowers yellow; calyx campanulate, sparingly pilose with white hairs, 3-4 mm long, the lobes rounded; standard deeply emarginate, the keel apically recurved and bent to one side. Pod oblong, compressed, 3-4 cm long, 7-8 mm wide, maturing black with shaggy tawny hairs, non septate; seeds compressed globose, 3-4 mm long, shiny black with a white hilum.
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