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has also been a matter of study and controversy. Six tribes are now recognized. The revised structure has greatly reduced Hamamelideae to a monotypic taxon, which had previously been further divided into subtribes:
* Corylopsideae (1 genus; Corylopsis)
* Dicorypheae (5 genera; Dicoryphe, Trichocladus, Neostrearia, Noahdendron,

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