KEY TO THE GENERA

1Trees. Flowers red, pink or white. Leaves without red or black glands. Stamen fascicles alternating with hypogynous scales. Capsule loculicidally 3-valved. Seeds winged.
1'Herbs or shrubs. Flowers yellow, often tinged red. Leaves with translucent glands and sometimes with black or red glands. Hypogynous scales (in Mal.) absent. Capsule (in Mal.) septicidal. Seeds (in Mal.) not or scarcely winged.