Tree 9–30 m. tall, with straight bole up to 18 m. tall, armed with strong woody conical spines; bark smooth, pale; usually flowering when quite leafless.. Young branchlets pale, at first ferruginous velvety, later glabrous, armed with sparse to fairly dense short straight prickles.. Leaflets elliptic, oblong-elliptic, ovate-elliptic or ovate, the terminal one usually broader, 7–23·5 cm. long, 3·5–16·5 cm. wide, rounded to acuminate at the apex, rounded or truncate at the base, ferruginous velvety when very young, later almost or quite glabrous; main veins sometimes with scattered prickles above; petiole 4–21 cm. long, at first velvety, later glabrous, often prickly; rhachis 2–8·5 cm. long; petiolules 0·6–1·2 cm. long.. Inflorescences rather dense, ± one-sided; rhachis 7–28 cm. long; peduncle 2·3–8 cm. long; pedicels 4–8 mm. long; bracts lanceolate, ± 0·5–1 cm. long, 3 mm. wide, pubescent; bracteoles ± 1 mm. long; all very deciduous.. Calyx vermilion, fusiform, narrowed above; tube 1–2 cm. long, slightly split unilaterally to form a spathe, at first pubescent, later glabrescent, the limb 0·8–2·8 cm. long, divided at its apex into 2 acute teeth, 2–8 mm. long.. Standard vermilion-scarlet, becoming coral-red, very short-clawed, ovate, 2·3–4 cm. long, 1·6–2·6 cm. wide, longitudinally folded, glabrous but with microscopically granular texture; keel somewhat shorter than the wings, both a quarter to a third the length of the standard.. Pods stipitate, woody, curved or contorted, up to 20 cm. long, 1·5–2·3 cm. wide, 1–10-seeded, extremely markedly constricted between some seeds to form subglobose to oblong-ellipsoidal 1–3-seeded compartments 2–4 cm. long and 1·5–2·3 cm. wide, densely brownish-olive tomentellous; valves completely separating, densely rugose-wrinkled outside.. Seeds orange or orange-vermilion, oblong, ellipsoidal or ± irregularly reniform, somewhat angled, longest dimension 1·1–1·6 cm., shorter dimension 0·7–1·1 cm., 0·7–1·0 cm. thick; hilum white, elliptic, 4–6 mm. long.
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Leaflets 7–23.5 × 3.5–16.5, oblong-elliptic to elliptic or ovate, ferruginous velvety when young, later glabrescent; main veins sometimes armed with scattered prickles above; petiole 4–21 cm long, velvety when young, glabrescent, often prickly; rhachis 2–8.5 cm long; petiolules 0.6–1.2 cm long.
Standard scarlet becoming coral-red, 2.2–4 × 1.4–2.6 cm, ovate, longitudinally folded, glabrous; keel and wings one-quarter to one-third the length of the standard, keel three-quarters the length of the wings.
Calyx fusiform in bud, spathe-like, the spathe up to 2 cm long, split one-third to half its length by the emergent corolla, the lobes fused to form a bidentate limb 0.8–2.8 cm with teeth 2–8 mm long.
Inflorescence compact, peduncle 2.3–8 cm long; rhachis 7–28 cm long; pedicels 4–8 mm long; bracts 0.5–1 cm long, lanceolate, deciduous; bracteoles 1 mm long, deciduous.
Pods stipitate, up to 20 × 1.5–2.3 cm, irregularly moniliform, fully dehiscent, densely brown-tomentose, 1–10-seeded.
Tree 9–30 m tall; bark armed with conical spines; usually flowering when leafless.
Seeds orange-red, 11–16 × 7–11 × 7–10 mm; hilum white, 4–6 mm long, elliptic.
Pale bark armed with strong prickles
Flowers red when tree is leafless.
Can be grown by seedlings. Seeds needs soaking.
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