Oncostylus is a genus of flowering plants in the family Rosaceae. It includes nine species with a disjunct distribution across the temperate and subantarctic Southern Hemisphere, including the Antipodean Islands, southern Argentina, southern Brazil, southern Chile, New Zealand, and Tasmania.
Species Nine species are accepted. Oncostylus albiflorus Oncostylus cockaynei Oncostylus divergens Oncostylus involucratus Oncostylus lechlerianus Oncostylus leiospermus Oncostylus pusillus Oncostylus renifolius Oncostylus uniflorus
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