Leaves 3-foliolate; leaflets 24–58 × 8–34 mm, elliptic, the lateral leaflets sometimes oblique, all leaflets appressed pubescent on both surfaces; petiole 0.8–5.6 cm long; rhachis 2 mm long; petiolules 2–3 mm long; stipules 5–7 mm long, ovate, striate; stipels 2–3 mm long, narrowly ovate.
Flowers axillary, solitary, in pairs or in 3–4-flowered fascicles; pedicels 1–2 mm long; bracts 5–8 mm long, triangular, acuminate, striate; bracteoles 4–5 mm long, narrowly triangular, acuminate.
Standard yellowish-cream, green or white, purple veined, 9–16 × 6–9 mm, oblong-obovate, emarginate, with 5–6 mm long lamelliform appendages; wings 8–11 mm long; keel 8–12 mm long.
Pods 2.8–4.7 cm × 5–8 mm, linear-oblong, sparsely hirsute, 3–6-seeded; beak 3–5 mm long.
Calyx pubescent; tube 1–2 mm long; lobes 5–12 mm long, narrowly triangular, acuminate.
Annual or perennial herb, climbing or trailing, up to 70 cm long.
Ovary 8–11 mm long, fusiform, sericeous; style to 6 mm long.
Seeds reddish-brown mottled black, 5 × 3 × 1 mm, smooth.
Stems slender, villous.