Large trees, ultimate shoots not divaricate. Stipules to 7 mm long, foliaceous, persistent, lanceolate to ovate. Leaves glabrous on both surfaces with minute papillae on veins giving a beaded appearance. Petioles eglandular. Inflorescence an unbranched or little-branched terminal or axillary raceme with shortly stalked congested cymules proximally and singly inserted flowers distally. Bracts and bracteoles small, suborbicular, persistent, eglandular, not enclosing groups of flower buds. Flowers hermaphrodite, strongly zygomorphic. Receptacle broadly obconic-campanulate, shorter than calyx lobes, asymmetric, hollow, hairy on both surfaces, but throat not blocked by retrorse hairs; calyx lobes 5, markedly unequal, suborbicular to Ungulate, strongly imbricate. Petals 5, unequal in size and shape, the 2 posterior larger than the others, markedly ungulate and enclosing stamens in bud. Stamens 8-30, inserted unilaterally on margin of disk; filaments united for half to three quarters of length into a strap; staminodes 5-8, inserted opposite stamens. Ovary inserted laterally at mouth of receptacle; unilocular with 2 ovules. Fruit large, hard; epicarp glabrous, crustaceous-verrucose; endocarp hard, thick, glabrous within, breaking irregularly on germination. Cotyledons slightly ruminate.
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