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Leaves pinnate with (1)3–6(8) pairs of leaflets; petiole (0.2)0.3–1.2(2.2) cm long, petiole and rachis together (1)2–6(7) cm long, pubescent like the stem; leaflets (0.5)1–2.7(3.8) × 0.3–0.6(1.0) cm, narrowly elliptic to oblanceolate, 3–5(6) times as long as broad, ± cuneate at the base, obtuse to emarginate at the apex; upper surface glabrous or occasionally sparsely appressed-pubescent, lower surface densely appressed-pubescent with greyish or silvery hairs, sometimes ± silky; stipules 2–4(6) × 0.1–0.3(0.5) mm, ± subulate.
Flowers in terminal and axillary, slender, lax racemes up to 15(19) cm long, sometimes also in the axils of the uppermost foliage leaves; bracts 1–2(4) × 0.3 mm, ± subulate; pedicels 2–3(5 in fruit) mm long.
Calyx 3–4 mm long, densely pubescent with appressed or ascending brown hairs; lateral teeth equalling or somewhat longer than the tube, upper teeth joined for up to ¼ their length or free to the base.
Seeds (9)10–11(12), 2.2–2.8 × 1.3–1.8 × 0.5–0.8 mm, brown or blackish, asymmetrically ovoid, with a conspicuous whitish aril 0.5–0.8 mm long on the longer side towards the narrower end.
Stems closely appressed-pubescent to occasionally ascending or spreading-pubescent, with usually light brown hairs.
Annual with erect or decumbent-ascending branched stems, (15)30–80(100) cm high.
Pods 32–52 × 3.5–4.5 mm, brown with appressed or ascending brown hairs.
Ovary pubescent; style glabrous, with pencillate.
Petals 6–8 mm long, orange, yellow, red or pink.
Upper stamen free.
