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The distribution of epiphytic orchids in Nigeria in relation to each other and to geographic location and climate, type of vegetation and tree species
- SANFORD, WILLIAM W.
- Biological journal of the Linnean Society 1969 v.1 no.3 pp. 247-285
- Orchidaceae, climate, environmental factors, epiphytes, trees, vegetation types, Nigeria
- The epiphytic orchids of 31 sites in Eastern, Midwestern, Western and Northern Nigeria are enumerated. The distribution of these 109 species of orchids is related to geographic location and to the environmental factors: climate, vegetation type, most common tree species. Distribution is further discussed in relation to variation within species. An hypothesis of a former more or less continuous orchid population fragmented by climatic shifts toward dryness, by erosion and land level sinkage, and by change of vegetation brought about by man, is advanced. It is suggested that, with such fragmentation, the orchids are now in a phase of rapid speciation and evolutionary development.