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The Calycanthaceae (sweetshrubs or spicebushes) are a small family of flowering plants in the order Laurales. The family contains three genera and only 10 species, restricted to warm temperate and tropical regions: * ''Calycanthus'' (two species; western and southeastern North America) * ''Chimonanthus'' (six species; eastern Asia) * ''Idiospermum'' (one species; Queensland, Australia) * ''Sinocalycanthus'' (one species; eastern Asia) - morphological and molecular data indicate this is a member of ''Calycanthus''. They are aromatic, deciduous shrubs growing to 2–4 m tall, except for ''Idiospermum'', which is a large evergreen tree. The flowers are white to red, with 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 that included South America, as indicated by the occurrence of Cretaceous Calycanthaceae fossils in Brazil. == References == * (Calycanthaceae ) in (L. Watson and M. J. Dallwitz (1992 onwards). The families of flowering plants. ) * (''Flora of North America'': Calycanthaceae ) * (''Flora of China'' Draft text of Calycanthaceae ) * ("Molecular phylogeny and intra- and intercontinental biogeography of Calycanthaceae" ) 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Calycanthaceae」の詳細全文を読む スポンサード リンク
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