A tree, 6—12(—30) m tall, with spreading branches forming a dense rounded crown. Bark almost smooth, grey, young shoots ribbed. Leaves simply paripinnate, oblong-elliptical in outline, 10—35 cm long; stipules subulate, 1 mm long, very early caducous; petiole terete but with a shallow ventral groove, 1.5—3.5 cm long, glandless; rachis 4.5—25 cm long, glandless; petiolule 2—4 mm long; leaflets in 4—16 pairs, subcoriaceous, oblong to ovate-oblong, 3—8 cm x 1—2.5 cm, 2—4 times as long as wide, base unequal-sided rounded to cuneate, apex rounded to retuse or blunt, often mucronate, glossy and glabrous above, dull and rough to delicately puberulous below. Inflorescence an erect, terminal, 10—60-flowered, leafy panicle, 15—60 cm long, composed of numerous dense corymbs up to 10 cm x 5—6 cm; peduncle robust, 5—7 cm long; bracts obovate in lower half, suddenly narrowing into a linear acute top 3—6 mm long, puberulous, early caducous; bracteoles absent; pedicel 2—3.5 cm long; sepals 5, unequal, rounded-ovate, 4—9 mm long, thick, puberulous, repanding-reflexed, long persistent; petals 5, orbicular-obovate, 1—2 cm long, yellow, glabrous, standard with 1—2 mm long claw; stamens 10, 3 lower ones with 6 mm long filaments and 5 mm long anthers, 3 upper ones staminodial, 4 meridian ones with 3—4 mm long filaments and 5 mm long anthers; ovary shortly tomentellous, style 4—5 mm long, stigma punctiform. Pod flattened, 20—30-seeded, 15—30 cm x 12—16 mm, alternately bulging and depressed in the centre, rim thick, glabrescent, dull, finally dehiscent. Seed very flat ovoid, 6.5—8 mm x 6 mm, light brown, glossy; areole oblong-elliptical, 3—4.5 mm x 1 mm. |