Leaves mostly 3-foliolate, uppermost often 1-foliolate; leaflets 8–30 × 2–8 mm, linear-oblanceolate to oblong-oblanceolate, appressed pubescent beneath; petiole 0–2 mm; stipules 0.
Standard oblate, yellow, lined brown, tomentellous outside; wings longer than the keel; keel 7–9 mm long, subangular with a twisted beak incurved at the tip.
Calyx (4)6–7 mm long, densely appressed pubescent; upper lobes broadly triangular-lanceolate, acuminate, ± twice as long as the tube.
Erect annual herb, (10)20–60 cm tall, with 0–numerous ascending branches, appressed pubescent.
Pod sessile, 7–9 × 5–7 mm, ovoid-globose, appressed pubescent, 6–12-seeded.
Seeds 1.5–2.5 mm long, oblique-cordiform, smooth.