Description: Trees or shrubs.
Leaves alternate and often crowded towards end of branches, venation obscure, petiolate.
Inflorescences axillary, triads or dichasia. Flowers 5-merous, yellow. Sepals persistent. Petals ± circular, free. Stamens usually numerous, fused into fascicles opposite the petals, inflexed. Ovary half-inferior, usually 3-locular; ovules usually pendent from the top of the axis; stigma capitate.
Fruit a loculicidal capsule, strongly exserted from the hypanthium, 3-valved, only splitting as far as the hypanthium; seeds mostly winged.
Distribution and occurrence: World: c. 40 species, Australia, New Caledonia, Malesia to Burma & Thailand. Australia: 3 species (endemic), Qld, N.S.W., Vic.
Text by Peter G. Wilson
Taxon concept:
| | Key to the species | |
| 1 | Leaves oblanceolate, apex obtuse to acute; lower surface of lamina pilose; oil glands scattered | Tristaniopsis laurina |
| Leaves narrow-elliptic, apex acuminate; lower surface of lamina glabrous; oil glands numerous, dense | Tristaniopsis collina |
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