Tree 12–30 m. tall, with grey bole armed with conical corky-based spines; bark smooth; usually flowering when leafless.. Young branchlets grey-brown, prominently ridged and covered with leaf-scars, at first ferruginous tomentose, later glabrescent, sparsely to moderately densely covered with short straight black prickles.. Leaflets elliptic, ovate or ovate-lanceolate, (2·5–)4–11(–19·5) cm. long, (0·6–)2–10 cm. wide, acuminate or subobtuse at the apex, obtuse or rounded at the base, ferruginous tomentose when young, later glabrescent above and with scattered tomentum beneath; main veins not prickly; petiole 3–5(–11) cm. long, at first velvety, later glabrescent; rhachis 1–3·5 cm. long; petiolules 0·4–1·2 cm. long; stipels limited to lateral leaflets, well developed.. Inflorescences rather dense; rhachis 3–20 cm. long; peduncle 4·5–12 cm. long; pedicels 3–5 mm. long; bracts elliptic, 7–8 mm. long, 4 mm. wide, tomentose; bracteoles linear-lanceolate, 6–8 mm. long, 1 mm. wide, tomentose; all soon deciduous.. Calyx at first fusiform, tomentose; tube 1–1·8 cm. long, narrowed above, at length splitting to form a spathe; limb in 2–3 parts forming 2 lips, the lower linear or narrowly oblanceolate, 1–3 cm. long, 1–3 mm. wide, entire or denticulate, the upper ± fan-shaped, 1·2–3 cm. long, usually deeply divided for a third to half its length into 2 diverging lobes, each 3–4 mm. wide, crenulate to 3-toothed or rarely entire with erose or denticulate apex, 4–10 mm. wide.. Standard pink, usually with darker red spots, short-clawed, oblanceolate, 2·2–3·4 cm. long, 0·5–1·2 cm. wide; keel-petals joined, slightly shorter than the wings, both a quarter to a third the length of the standard.. Pods shortly stipitate, somewhat woody, curved, 5–12 cm. long, 2·5–3 cm. wide, (1–)2–4-seeded, very constricted between the seeds to form globose or oblong-ovoid compartments 2–3 cm. long and 1·7–3 cm. wide, densely ferruginous tomentose; valves completely separating, smooth.. Seeds orange, longest dimension 2 cm., shorter dimension 1 cm.; hilum white.
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Flowers usually in threes, corolla and calyx limb pink, in copious softly tomentose panicles, appearing when the tree is leafless.
A tall tree, 60–100 ft. or more high, buttressed at the base
Prickles on the trunk and branches
Can be grown by cuttings or seedlings. Seeds needs soaking.