- Leaves simple, alternate, entire or toothed.
- Leaves bunched at twig tips.
- Narrow, free stipules.
- Flowers without petals, male flowers in catkins.
- Fruit an acorn.
Diagnosis: Trees, with slender free stipules, leaves alternate, simple, crenate or entire, often with stellate hairs, petiole short with swollen base.
Diversity: Total: 1 genus, 4 species. Trees: 1 genus, 4 species.