Author: Jan Scholten
English: Sweetshrubs; Spicebushes.
Region: warm temperate and tropical regions
Genera: 3; 10 species
Calycanthus: 3 species; western and southeastern North America
Chimonanthus; 6 species; eastern Asia.
Idiospermum: 1 species; Queensland, Australia.
Aromatic, deciduous shrubs; ± 3 m tall; Idiospermum is a large evergreen tree; flowers white to red, spirally arranged tepals.
DNA-based phylogenies indicate the Northern Hemisphere Calycanthus and Chimonanthus diverged from each other in the mid-Miocene, while the Australian Idiospermum had already diverged by the Upper Cretaceous and likely represents a remnant of a former Gondwanan distribution of Calycanthaceae
In the Apg4 system of 2016, Calycanthaceae were placed in the Magnoliales order in the magnoliids clade.