Trees evergreen, to 28 m tall, to 50 cm d.b.h. Branches with lenticels; branchlets glabrous, 4-5 mm in diam. Petiole 2-6 cm, glabrous; leaf blade ovate-lanceolate or ovate-oblong, 10-17 × 4-7 cm, leathery, glabrous, lateral veins 6 or 7 per side, lowermost pair very strong, prominently raised abaxially, conspicuous adaxially, veinlets prominent abaxially, inconspicuous adaxially, base rounded, margin entire, apex acuminate. Flowers axillary in upper twigs. Pedicel 2-4 cm, puberulent. Sepals, petals, and stamens unknown. Ovary conical, brown pubescent; style 5-7 mm, pubescent. Capsule globose, 3-4 cm in diam., 3-or 4-valved; valves 3-3.5 cm, 4-5 mm thick; prickles 6-8 mm. Seeds 1.5-2 cm. Fl. Mar-Apr, fr. Sep-Dec.
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