Standard obovate, yellow, with darker red-fringed marks at the base inside, brown lined and subdensely pubescent to tomentellous outside; wings nearly as long as the keel; keel 4.5–5.5 mm long, angular, with a nearly straight twisted beak.
Erect annual or short-lived perennial 0.6–1 m tall, developing numerous ascending flowering branches above, and sometimes a few long ones from near the base; stem densely silvery subappressed pubescent.
Leaves 3-foliolate; leaflets 8–20 × 1–3 mm, linear-oblanceolate to oblong-oblanceolate, thinly pilose above, subdensely so beneath; petiole 3–7 mm long; stipules 0.
Racemes sessile, 3–14 cm long, densely many-flowered; bracts 2–3.5 mm long, linear-subulate; pedicel 1–2.5 mm long, without bracteoles.
Calyx 3.5–4 mm long, silvery tomentose; upper lobes narrowly attenuate-triangular, 2–3 times as long as the tube.
Seeds 2–2.5 mm long, ovate-cordiform, smooth, with a prominent aril.
Pod sessile, 4–5 × 3–3.5 mm, ovoid-globose, pubescent, 2-seeded.