Clusia was named after Charles de l’Ecluse of Artois (1526-1609) (Carolus Clusius) botanist, gardener and author. Trees, shrubs or herbs, leaves simple usually opposite, secretary canals present, latex often yellowish, resins also present. Flowers regular, sepals and petals usually 4-5; stamens usually numerous often grouped into bundles, outer whorl often sterile. Ovary superior, fruit usually a capsule or berry, calyx persistent. Chief Australian genera are Calophyllum, Garcinia and Hypericum. Harungana is a serious weed.