- Weak-wooded shubs, herbs, and epiphytes.
- Leaves simple, opposite, entire or serrate.
- Without stipules.
- Leaves at a node often unequal in size.
- Flowers tubular, often reddish, with four joined anthers.
- Fruit a berry or capsule with many small seeds.
Diagnosis: Treelets, without stipules, leaves opposite, pairs often unequal in size, simple, entire, fleshy texture, no inter-petiolar ridge, orange tubular flowers.
Diversity: Total: 20 genera, 61 species. Treelets: 1 genus, 3 species.