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Leaflets (1)3, paler beneath, 1.8–5(10) × 0.8–1.9(4.2) cm, narrowly elliptic-obovate or elliptic, rounded and mucronulate at the apex, cuneate, pubescent and glandular above, densely grey pubescent and glandular beneath; venation impressed above, raised beneath; petioles 4–5(20) mm long; rhachis 3(18) mm long; petiolules 1.5–2 mm long; stipules 6–14 × 1–3 mm, lanceolate, pubescent or tomentose.
Racemes axillary, scented, the flowering part 2–5.5(7) × c. 2 cm; peduncle 4–7(12.5) cm long, ferruginous pubescent; pedicels 1.5 mm long, strongly deflexed; bracts falling very early, 7–11 × 1–3 mm, lanceolate, aristate, hairy.
Erect pyrophytic herb, 10–45(75) cm tall, with several to many sparsely branched or unbranched stems from a large napiform woody rootstock, 10–20 × 1.7–3 cm, containing red dye.
Standard yellow tinged pink, or dull orange-buff tinged red, 9–15 × 5.5–9 mm, broadly elliptic, densely pubescent and glandular.
Seeds brown with some speckling or black, 5–5.5 × 3.2–3.5 × 1.3–1.5 mm, oblong; rim aril cream-coloured or yellowish.
Pod 1.1–1.5 × 0.9–1.2 cm, orbicular-oblong, apiculate, covered with long ferruginous hairs, short hairs and glands.
Calyx pubescent, ciliate and glandular, 6–10 mm long; lobes lanceolate, acuminate, 2–3 times as long as the tube.
Stems of 3–6 internodes, somewhat flattened, densely, usually appressed, ferruginous pubescent.
