- Leaves simple, opposite, entire, without stipules.
- With latex white, clear, or often yellow to orange.
- Petioles of apical leaf pair often pressed together, protecting the terminal bud.
- Leaves often thick and succulent with inconspicuous secondary veins.
- Flowers unisexual, with free petals, large stigma, and numerous stamens.
- Fruits are drupes, berries, or capsules with arillate seeds.
Diagnosis: Trees or hemi-epiphytes, clear, white, yellow, or orange latex, without stipules, leaves simple, opposite, entire, petioles of terminal leaves often appressed together to protect the apical bud, secondary veins often obscure ,and leaf texture often rubbery.
Local distribution: Widespread.
|Apocynaceae||: petioles at twig tip pressed together only at base, only white latex, lateral veins conspicuous.
|Asteraceae||: interpetiolar ridge, pith in stem, usually pubescent.
Diversity: Total: 8 genera, 21 species. Trees: 7 genera, 12 species.