Tropical Africa and Islands. 97 



IV. AFRICA. 



1. TEOPICAL AFRICA AND ISLANDS. 



2. CAPE COLONY, NATAL, TRISTAN D'AOUNHA. 



denotes the only hitherto known localities. 



1. TROPICAL AFRICA AJSTD ISLANDS, INCLUDING 

 ABTSSESnA AND ARABIA. 



Gleicbenia. 



G. polypodioides, Sm. Hab. : Tropical Africa, north to Angola. 



G. Boryi, Kze. Hab. : Bourbon. $. 



G. flagellaris, Spreng. Hab. : Bourbon, Mauritius, Madagascar. 



G. dichotoma, Willd. Hab. : Bourbon, Mauritius, Seychelle 

 Islands, Madagascar, Comoro Isles, Mayotta ; Fernando Po (long 

 narrow segm.). Island of St. Thomas, Sierra Leone; Cameroon 

 Mountains, Congo. 

 Cyatbea. 



C. Manniana, Hook. Hab. : Fernando Po, and Cameroon Moun- 

 tains, alt. 3-4,000 feet. $. 



C. Welwitschii, Hook. Hab. : W. Africa, Island of St. Thomas, 

 in the Bight of Biafra, alt. 3-7,000 feet ; Fernando Po, Angola, i. 



C. Camerooniana, Hook. Hab. : Cameroon Moimtains, alt. 3- 

 4,000 feet. $. 



C. Angolensis, Weho. Hab. : Benguela, district of Huilla, Tro- 

 pical W. Africa, alt. 3,500-5,550 feet ; very rare. Welwitsch. $. 



C. Kirkii, Hook. Hab. : Comoro Isles, Johanna Island, alt. 2,000 

 feet. Dr. Kirk. $. 



C. Seychellarum, Mett. Hab. : Seychelles. $. 



C. excelsa, Svjz. Hab. : Bourbon and Mauritius. $. 



C. canaliculata, Willd. Hab.: Bourbon and Mauritius, Mada- 

 gascar. $. 



C. glauca, Bory. Hab. : Bourbon. 

 Hemltella. 



H. Capensis, M. Br. Hab. : Mauritius, Comoro Isles. Kuhn. 



H. .Junghuniana, Mett. Hab. : Antananarivo, Madagascar {T). 

 Alsopbila. 



A. ^thiopica, Welw. MS. Hook. Hab. : Tropical Africa, S. of 

 the Line ; Angola ; Golungo alto, alt. 1-2,400 feet. — Welwitsch. 

 Comoro Isles, Johanna Island. 



A. obtusiloba, Hook. Hab. ; Sierra del Crystal, Tropical Africa. 



