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.Hill * '' Exochaenium fernandesianum'' (Paiva and Nogueira) Kissling * '' Exochaenium gracile'' (Welw.) Schinz * '' Exochaenium grande'' (E.Mey.) Griseb. * '' Exochaenium hockii'' (De Wild.) Kissling * '' Exochaenium lineariforme'' (Sileshi) Kissling * '' Exochaenium macropterum'' (Sileshi) Kissling * '' Exochaenium oliganthum'' (Gilg) Kissling * '' Exochaenium perparvum'' (Sileshi) Kissling * '' Exochaenium platypterum'' (Baker) Schinz * '' Exochaenium primulaeflorum'' Welw. * '' Exochaenium pumilum'' (Baker) Hill * '' Exochaenium pygmaeum'' Milne-Redhead * '' Exochaenium rotundifolium'' (Peter) Kissling * '' Exochaenium teucszii'' (Schinz) Schinz * '' Exochaenium wildemanianum'' (Boutique) Kissling

References

{{Taxonbar, from=Q18171581 Gentianaceae genera Gentianaceae