Woody vines or scrambling shrubs, glabrous. Leaves opposite, simple; stipules minute, deciduous. Inflorescence an axillary cyme or flowers solitary; flowers bisexual, actinomorphic; sepals 4, ± free; petals minute or absent; stamens 8, anthers opening via longitudinal slits; ovary semi-inferior, 4-locular, stamens and perianth attached in lower half of ovary; ovules 1 per locule. Fruit hard and nut-like, 1 seeded, sepals persistent.
1 genus and 2 species, endemic to Australia.
Previously included in Cunoniaceae.