Trees. Leaves spiral, simple, entire, with a slightly thickened, marginal nerve, often papillose beneath, (long) petioled. Inflorescences axillary and terminal, paniculate. Flowers ♂ (usually dominant and numerous) and bisexual (plants polygamo-andromonoecious), or bisexual only. Calyx 5-lobed. Floral axis between calyx and stamens elongated and gynandrophore-like in 2 spp. Petals 5, imbricate, persistent, accrescent, usually much enlarged and reflexed in fruit, partly or wholly puberulous on both surfaces, glabrescent. Disk extrastaminal, consisting of 5 gland-like lobes, confluent with the base of filaments or alternating with them, glabrous. Stamens 5; filaments filiform or subulate, glabrous; anthers dorsifixed. Ovary 1-celled, sparsely hairy, abortive in (♂; style distinct, cylindric; stigma capitellate or rarely slightly thicker than the style. Abortive pistil in ♂ very small, hairy. Drupe 1-celled, supported by the 5 usually much enlarged, reflexed, wing-like petals; endocarp coriaceous. Seed with testa adherent to the endocarp; embryo straight, cotyledons free, plano-convex.
Lowland and hill forest, sometimes in swamp or peat-swamp forest, up to c. 750 m, only S. robinsonii montane (1050-1650 m).
Home