Dillenia, named after John James Dillenius (1684-1747) a physician at Giessen and later a Professor of Botany at Oxford. Trees or shrubs sometimes climbing or scrambling, rarely herbs. Leaves alternate, simple often leathery margins entire or toothed often. Trichomes often present as scales, simple or stellate hairs. Petals 3-5 yellow, often emarginate at the apex, soon deciduous; stamens numerous. Carpels free or fused, styles separate, fruit usually a capsule. Reports of plants twining in both directions!