Trees or small trees, to 30 m tall. Branches grayish to deep brown. Spines robust, terete, conical, to 16 cm, often branched. Leaves pinnate, 10-18(-26) cm; petiolules 1-2(-5) mm, puberulent; leaflets (2 or)3-9 pairs, ovate-lanceolate to oblong, 2-8.5(-12.5) × 1-4(-6) cm, papery, abaxially slightly pubescent on midvein, adaxially puberulent, reticulate veinlets conspicuously raised on both surfaces, base rounded or cuneate, sometimes slightly oblique, margin serrate, apex acute or acuminate, tip rounded, mucronate. Flowers polygamous, yellowish white, in axillary or terminal, puberulent racemes 5-14 cm. Male flowers: 9-10 mm in diam.; pedicels 2-8(-10) mm; receptacle deep brown, 2.5-3 mm, outside pubescent; sepals 4, triangular-lanceolate, ca. 3 mm, both sides pubescent; petals 4, oblong, 4-5 mm, puberulent; stamens (6-)8; rudimentary pistil ca. 2.5 mm. Bisexual flowers: 10-12 mm in diam.; pedicels 2-5 mm; sepals and petals similar to those of male flowers but longer; stamens 8; ovary hairy at base and on sutures; ovules numerous; stigma 2-lobed. Legume brown or reddish brown, curved, strap-shaped, 12-37 × 2-4 cm, straight or twisted, with slightly thick pulp, swollen on both surfaces, some legumes shorter and smaller, ± terete, 5-13 × 1-1.5 cm, without seeds; stipe 1-3.5 cm; valves leathery, often farinose. Seeds numerous, brown, shiny, oblong or elliptic, 11-13 × 8-9 mm. Fl. Mar-May, fr. May-Dec. 2n = 28*.
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A tree. It loses its leaves. It grows 12-30 m tall. It has large branched thorns. The leaves are yellowish-green. The leaves have leaflets along the stalks. The fruit are pods. They are purplish-brown and thick and woody. They can be 25 cm long. There are many small brown seeds. They are oblong and 11-13 mm long by 8-9 mm wide.
Can be grown by seedlings. Seeds needs soaking.
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