Article from Bean's Trees and Shrubs Hardy in the British Isles
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'Berberidopsis' from the website Trees and Shrubs Online (treesandshrubsonline.
A monotypic genus which owes its name to the character of the flower, in which the numerous perianth segments, as in Berberis, are not differentiated into distinct whorls of sepals and petals. In fact, the two genera are in no way related. Berberidopsis, at one time placed in the family Bixaceae, then Flacourtiaceae, is now placed in Berberidopsidaceae, which contains only one other genus (Streptothamnus). Berberidopsis consists of three species, one from eastern Australian and two from Chile, only one of which is in cultivation.