Trees; branches slender, glabrous, sparsely spiny; thorns slender, 1.2-2.5 cm. Petiole 5-8 mm; leaf blade lanceolate, 6.5-8[-11] × 2-3.5 cm, subleathery, abaxially pale, adaxially green, base cuneate, margin serrate, apex acuminate; lateral veins 7-9 pairs, obvious on both surfaces. Cymes fascicled at axils, dichotomous; peduncle slender, 2-4.5 cm, with several conglomerate bracts at base, bracts reddish brown, lanceolate, 2-3 mm; pedicel tenuous, 5-8 mm when fruiting. Flowers not seen, purportedly 3-4 mm in diam. Capsule obtriangular, 0.6-1 cm, purplish, 3-valved. Seeds black. Fl. Jun.
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