Which natural area of Africa has the greatest plant diversity?

Africa, in general, has a very rich nature, but a fairly large part of this continent is occupied by deserts, and natural diversity is concentrated in the central parts, in the natural zone of equatorial and tropical forests. Thousands of plant species can be found here, many of which are endemic and found only in Africa. In this area, in addition to flowering plants, you can find many tree ferns and gymnosperms that have existed since the days of the dinosaurs.