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APPENDIX F. 



Tlie most remarkable features of the Temperate vegetation 

 of these West African tropical mountains are : — 



1. Its poverty. 



2. The preponderance of Abyssinian genera and species. 



3. The considerable proportion of European plants. 



4. The paucity of South African genera and species. 



5. The great rarity of new genera. 



6. The absence of St. Helena and Canarian types. 



Upon each of these propositions I have a few general re- 

 marks to offer. 



In the poverty of their Flora the Cameroons range and 

 Peak of Fernando Po seem to partake of the characteristics of 

 the Abyssinian Alps. We know far too little of the physical 

 geography of either of these districts to hazard many conjec- 

 tures upon this point, which must to a certain extent be de- 

 pendent on the arid volcanic nature of the soil and the limited 

 area of the Temperate region. Mr. Mann spent many weeks, 

 and at various seasons, in his explorations, and yet 237 flower- 

 ing plants were all that rewarded his toil. Geological causes 

 have probably had, in the case of the Cameroons Mountains, 



