The fauna and flora of the large island of Madagascar, situated in the eastern Indian Ocean off the coast of East Africa, has been recognised for many years as one of the most peculiar anywhere in the world, and as one of the most endangered. It has a rich orchid flora of about 1000 species.
SummarySix new species: Bulbophyllum caniceps, B. cochinealloides, B. fierenanaense, B. geminiflorum, B. oenanthum and B. rudolphus are described for the first time. The identity and nomenclature of Bulbophyllum cylindrocarpum is discussed and its var. andringitrense is recognised at species rank as B. jeanbosseri. Bulbophyllum aubrevillei and B. kieneri are compared with the latter becoming a synonym. The history and identities of Bulbophyllum pentastichum vs B. quadrifarium are clarified and the necessary taxonomic changes and type selections are made. A new sect. Inversiflora is formally described.
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