Annual, with a short erect stem, up to 3(–6) dm. tall, and long procumbent lower branches.. Branches sparsely clothed with rather bristly hairs.. Leaves 1-foliolate; leaflets ovate-lanceolate or ovate, up to 20–80 mm. long and 15–24 mm. wide, sparsely hirsute on both surfaces; petiole up to 4–7 mm. long.. Stipules filiform, up to 4(–6) mm. long.. Racemes pedunculate, up to 4–8 cm. long, with ± 12–20(–33) closely arranged flowers towards the top; bracts filiform, up to 4 mm. long; bracteoles inserted at the base of the calyx, similar to the bract.. Calyx becoming basally truncate and deflexed against the pedicel, 3–4 mm. long, sparsely hirsute; lobes acuminate-triangular, a little longer than the tube.. Standard suborbicular, cream, with fine purplish veins, glabrous outside; wings longer than the keel; keel strongly rounded about the middle, with a short blunt incurved untwisted beak, 3–4 mm. long.. Pod sessile, subglobose, 5–6 mm. long, densely hairy with two storeys of long hairs, rather thick-walled and tardily dehiscent, 1–2-seeded.. Seeds oblique-cordiform, 2·5–3 mm. long, wrinkled, brown.
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