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Standard elliptic, pale yellow, later flushed pink; wings much shorter than the keel; keel 11–12 mm long, angular, with a long straight narrow twisted beak.
Pod with a stipe 3–4 mm long, 8–11 (including stipe) × 5–6 mm, rounded ellipsoid, many-seeded (ovules 40).
Leaves subsessile, 1-foliolate; leaflets 5–13 × 0.7–1.5 mm, linear-oblanceolate, acute; stipules 0.
Calyx 3–4 mm long; upper lobes attenuate-triangular, 2–2.5 times as long as the tube.
Slender erect annual 30–60 cm tall, branching above, glabrous.
Seeds 1 mm in diameter.
