Exochaenium
The genus ''Exochaenium'' (22 species) is endemic to sub-Saharan Africa, with species occurring in most tropical and sub-tropical regions of the continent, particularly on the Katanga plateau (Angola, Democratic Republic of Congo and Zambia), with many extending to the Sudano-Zambesian and Guineo-Congolian regions. The genus is monophyletic In cladistics for a group of organisms, monophyly is the condition of being a clade—that is, a group of taxa composed only of a common ancestor (or more precisely an ancestral population) and all of its lineal descendants. Monophyletic gro ... and is used to study the variation and evolution of herkogamy. Species * '' Exochaenium alatum'' (Paiva and Nogueira) Kissling * '' Exochaenium baumianum'' (Gilg) Schinz * '' Exochaenium caudatum'' (Paiva and Nogueira) Kissling * '' Exochaenium clavatum'' (Paiva and Nogueira) Kissling * '' Exochaenium debile'' Welw. * '' Exochaenium dimidiatum'' (Sileshi) Kissling * '' Exochaenium exiguum'' A.W ...
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