Trees to 25[-30] m. Stems 1; bark relatively thick, deeply fissured on older trees. Leaves persistent; petiole tapering from blade to insertion point, indistinct from blade, obvious at insertion point; blade elliptic to oblanceolate, coriaceous, base cuneate then long-tapering, margins toothed at least apically, apex acute to obtuse, veins inconspicuous, to 8-15[-17] pairs, midrib elevated abaxially, depressed adaxially. Inflorescence bracts deciduous, 2-4, scattered proximal to calyx. Pedicels terete, (3-)5-7 cm. Flowers 5-7 cm diam.; sepals persistent (deciduous on older fruits), connate proximally, concave, often thick, margins ciliate, apex rounded, sericeous; petals 5, connate proximally, white, unequal, base constricted, margins crenulate, outermost petal incurved, abaxial surface silky-puberulent [stellate-pubescent]; stamens usually (50-)75-125 (-150), [distinct] connate proximally; pistil 5-carpellate; ovules 4(-8) per locule; styles 1 [absent]; stigmas 5-lobed. Capsules brown, ovoid, base rounded, apex acute, dehiscence loculicidal from apex only, sepals adnate to valves proximally; columella persistent. Seeds 10-20[-40], dark brown, ovoid, asymmetric, rough, apical wing prominent. x = 15 or 18.
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