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Standard yellow with strong purple to reddish veining on the outer face, 1–1.2 × 0.85–1.1 cm, suborbicular, apically emarginate, the appendages small, triangular, divergent and without free tips; wings yellow, 1–1.1 cm × 3.25–4 mm, with an upper basal tooth and with lamellate sculpturing in upper basal half on outer face; keel yellow (slightly paler than wings) with some purple striping on the beak, 1.1–1.2 cm × 4–6 mm, the limb with a ± horizontal acuminate tooth.
Annual herb, up to 2.5 m high, not armed with prickles. Leaves 8-20-foliolate, glabrous, leaflets 9.0 x 2.5 mm. Flowers: in a raceme, 5-7-flowered; axis of inflorescence > 20 mm long, including peduncle of over 5 mm long; corolla with standard up to 15 mm long, yellowish green with continuously dark purple veins; Jan.-Mar. Pods ± 40-60 x 25 mm across seeds, markedly torulose, not winged.
Pod (4.6)6–8.5 cm × 1.5–2.75 mm, linear to slightly falcate, moniliform, rostrate, stipitate, held ± erect, glabrous, 7–12-seeded; septa 5–7 mm apart; valves with reticulate venation in central area above seeds, the margins developing a slightly raised ridge on drying which tapers out towards the septa.
Racemes 1.6–9 cm long, (2)5–7(10)-flowered; peduncle 1.5–3.9 cm long, glabrous; pedicels 4–10 mm long, glabrous; bracts 1.5–3(4) mm long, linear, persistent; bracteoles 1.5–3 mm long, linear, persistent, located below the receptacle.
Calyx 3–4 × 2.5–4 mm; tube glabrous; teeth 0.5–1 mm long, subulate, sparsely woolly on the inner surface and at the tips.
Seeds brown or olive-green mottled blackish, 3 × 1.75 mm, 1.75–2 mm thick; small hilum in central circular pit.
Ovary and style glabrous, 10–13-ovulate, ovules widely spaced.
Erect annual herb or spindly subshrub (0.6)1.5(2) m tall.
Stems glabrous, without prickles.
