Here are a couple resources I have come across for identifying plants endemic to areas of Africa.
asourceshttp://www.westafricanplants.senckenberg.de/root/index.p
http://www.sud-expert-plantes.ird.f...biodiversity_in_western_africa.pdf?1385983882
asourceshttp://www.westafricanplants.senckenberg.de/root/index.p
http://www.sud-expert-plantes.ird.f...biodiversity_in_western_africa.pdf?1385983882