PREFACE. IX 



Reference has also been made to the specimens contained in the 

 Herbarium of the British Museum, collected by Afzelius, Smeath- 

 mann, Dr. Daniell, and others, at Sierra Leone, and by Leprieur 

 and Perrottet in Senegambia. 



From North Central our material is exceedingly scanty, being 

 almost limited to specimens collected by Dr. Edward Vogel in 

 crossing the Sahara, by way of Aghadem, and in Bornu and 

 adjacent provinces. A few plants are cited from this region, on 

 tlie authority of Robert Brown's ' Essay on the Plants of Oudney, 

 Denham, and Clapperton ' : the specimens collected by these 

 travellers are lost. 



From Nile Land, there are at Kew excellent sets of : — 



1. Dr. Schimper's Abyssinian collections, distributed by the 

 ' Unio Itineraria ' of Wiirtemberg. 



2. Dr. Kotschy's Kordofan and Nubian plants. 



3. Abyssinian plants, collected b}^ Dr. Roth in 1841-42, 

 presented by the East India Company. 



4. Abyssinian plants of Dillon, Petit, and others, communi- 

 cated by Count Franqueville, from the Richardian Herbarium in 

 his possession. 



5. Upper Nile plants, collected by Mr. Petherick and Dr. Murie, 

 communicated to Sir W. J. Hooker by the former distinguished 

 traveller. 



6. Nubian plants, collected by Dr. Bromfield. 



7. Captain Grant's valuable herbarium, with his original notes, 

 formed in company with Captain Speke on their celebrated 

 expedition to the Victoria Nyanza. 



8. A set of Dr. Schweinfurth's Nubian and Gallabat plants. 



9. Specimens of a few resin-affording trees, from the Somali 

 country, communicated by Colonel Playfair. 



We have also had the opportunity of examining the plants, 

 collected by Mr. Salt in Abyssinia, which were determined by 

 Mr. Brown, and enumerated in the Appendix to his travels, 

 contained in the Herbarium of the British Museum. 



