Trees 8-45 m tall, buttressed. Branchets 4-angled, becoming terete with age; ultimate branches pendulous. Leaves shortly petiolate, opposite, oblong to ovate or lanceolate, leathery to papery, glabrous, secondary vein pairs numerous, joined in a series of intramarginal arches, base rounded to cordate, apex acute to acuminate. Inflorescence of few to many flowers in a lax, terminal corymb. Flowers actinomorphic, bisexual, usually 4-or 6-merous, but variably 4-8-merous on same or different individuals. Floral tube obconic or broadly campanulate, persistent in fruit; sepals 4-8, triangular-ovate, thick. Petals 4-8, broad, crinkled, shortly clawed. Stamens 12 or 24-50+; filaments filiform-subulate from a broadened base, long; anthers recurved or replicate over one end of connective. Ovary semi-inferior; ovules numerous; style long-exserted, slender; stigma capitate to slightly 4-lobed. Fruit indurate capsules, partially surrounded by persistent floral tube, oblong to ovoid-globose, loculicidally deeply dehiscent, 4-9-valved. Seeds numerous, filiform, fragile, 2-tailed. 2n = 48.
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Buttressed tall trees with pendulous ultimate branches. Leaves glaucous beneath. Flowers in terminal, 5-to many-flowered corymbs, 4-8-merous. Calyx-tube ob-conical or cupshaped, segments triangular-ovate. Petals shortly clawed, broad, crisped. Stamens 12 or many, filaments long, filiform-subulate from a broadened base; anther recurved or replicate over one end of the connective. Ovary 4-8-celled, stigma thick, lobed. Capsule loculicidally 4-8-valved. Seeds tailed at both ends by the produced testa.