Leaves 3-foliolate, estipulate; leaflets mostly 3–6.5 × 0.4–1.2 cm, linear-lanceolate to oblong-lanceolate, thinly appressed puberulous beneath; petiole much shorter than the leaflets.
Racemes 5–15 cm long, often long-pedunculate, with numerous flowers crowded above; bracts 0.5–2 mm long, subulate or triangular-caudate; bracteoles at the base of the calyx, smaller.
Standard oblate, pale yellow, veined reddish-brown or purple; wings longer than the keel; keel 4–5 mm long, rounded about the middle, with a very short blunt slightly incurved beak.
Calyx 1.5–2.5 mm long, becoming basally truncate and deflexed against the pedicel, appressed puberulous; lobes triangular, slightly acuminate, shorter than the tube.
Erect laxly branched annual 20–70(100) cm tall; branches thinly appressed puberulous, glabrescent.
Pod subsessile, 2–2.5 × 0.6–0.8 cm, ellipsoid-cylindrical, puberulous, 20–40-seeded.
Seeds 2–2.5 mm long, oblong-reniform, smooth, mauve, pale brown or orange-red.