Standard elliptic-obovate, pale yellow, with reddish lines and medially puberulous outside, and with red fringed basal patches inside; wings shorter than the keel; keel 4–5 mm long, angular, with a narrow twisted slightly incurved beak.
Racemes 5–25 cm long, laxly many-flowered, with a few other flowers developing in the axils below; bracts 0.5–1.5 mm long, linear to shortly linear-lanceolate; pedicel 2–3(5) mm long, without bracteoles.
Leaves 1-foliolate; leaflets 10–45 × 1–8 mm, linear-oblanceolate above to oblong-elliptic below, upper ones acute, appressed puberulous beneath; petiole 1–3(4) mm long; stipules 0.
Calyx 2.5–3.5 mm long, appressed puberulous with generally brown-based hairs; upper lobes attenuately triangular-lanceolate, 2–2.5 times as long as the tube.
Erect laxly branching annual 0.2–1 m tall; stem slender, appressed puberulous.
Seeds 2–2.7 mm long, oblique-cordiform, smooth, with a small aril.
Pod sessile, 3–3.5 × 3 mm, ovoid-globose, puberulous, 2-seeded.