skos:historyNote |
O. cumana was previously treated as a subspecies of O. cernua, in accordance with many botanical authorities, including Beck-Mennagetta (1930), Chater and Webb (1972) and The Plant List (2013). There is now, however, well supported evidence for a clear distinction between the typical O. cernua and the form now known as O. cumana Wallr. (CABI 2019)
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