A family of five genera and 11 species in China, North America and NE Australia; one genus and species occurs naturally in Australia.

Idiospermum - A monotypic genus endemic to Australia. Blake (1972).

Blake, S.T. (1972). Idiospermum (Idiospermaceae), a new genus and family for Calycanthus australiensis. Contributions from the Queensland Herbarium No. 12:1-37.

Jessup, L.W. (2007) Idiospermaceae. Flora of Australia 2: 105.