Small, erect annual herb 30-200 mm high. Stems much branched from base, yellow-brown, strigose, with scattered white hairs. Taproot slender, simple or branched, up to 200 mm long, up to 3 mm thick at base. Stipules paired, obliquely ovate, acute, up to 2.0 mm long, white, strigose along margins. Leaves variable; leaflets usually solitary, terminal, rarely up to 4, in short-stalked, opposite to subopposite pairs, linear, 2.0-12.0(-14.0) x 1.0-1.5 mm, acute or obtuse at apex, obtuse at base, strigose, with white hairs on both surfaces; petioles up to 65 mm long, strigose, with scattered white hairs. Inflorescence few-flowered, pedunculate axillary raceme, bracteate. Bracts broadly ovate, acute, strigose, brown hairs intermixed with white hairs, especially at apex and along margins; bracteoles present, small, up to 0.5 mm long. Flowers small, flower colour not known. Calyx campanulate, 3-4 mm long, subequal. 5-toothed, densely brown, strigose, with a few white hairs intermixed. Vexillum broadly obovate, shallowly bilobed, up to 9 x 6 mm, glabrous. Wing petals narrowly elliptic, shorter than keel, up to 8 x 2 mm, with little sculpturing. Keel petals oblong obtuse, up to 9 x 4 mm, auricle and pocket absent. Staminal sheath up to 8 mm long, persistent in fruit; anthers uniform. Style hooked, with conspicuous tuft of white hairs behind stigma, persistent in fruit. Pods inflated, broadly oblong ovoid. 14-24 x 9-12 mm, yellow-brown, sometimes mottled with purple, glabrous, conspicuously veined. Seeds broadly reniform or ‘U' shaped, yellow-brown, slightly wrinkled, up to ± 17 per pod.
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Annual, non-climbing herb, 0.03-0.2 m high; stems strigose, with scattered white hairs. Leaves variable, 60-70 mm long. Leaflets 2-12 x 1.0-1.5 mm, usually solitary, terminal, rarely up to 4, opposite to subopposite pairs, linear, acute or obtuse at apex, obtuse at base strigose, with white hairs on both surfaces. Stipules up to 2 mm long. Inflorescence 3-5-flowered; peduncles 40-45 mm long; bracts up to 1 mm long. Pedicels up to 2 mm long. Flowers up to 9 mm long. Calyx 3-4 mm long. Gynoecium: ovary glabrous, 17-ovuled; style hairy only around stigma. Flowering time Oct. Pod 18-21 x 11-12 mm, inflated, widely oblong ovoid, yellow-brown, sometimes mottled with purple, conspicuously veined.