Included here is a chain of African mountains stretching in an arc from the Kenya border across much of Tanzania.
Of the endemic vascular plants so far recorded there are about 166 species in 82 genera and 43 families.
Skarbek, C. 2008. A Review of Endemic Species in the Eastern Arc AfromontaneRegion: Importance, Inferences, and Conservation. Macalester Review in Biogeography Issue 1.