VI PREFACE. 



a few species collected in the French Congo. Dr. L. Pierre, 

 a set of plants collected by Klaine in Gaboon. 



V. South Central. — Dr. Em. de Wildeman, plants from various 

 collections made in the Congo Free State. 



VI. Mozambique. — R. N. Lyne, plants from Zanzibar and 

 Pemba Island. J. M. Purves, plants from Nyasaland. Sir Alfred 

 Sharpe, K.C.M.G., C.B., plants from Nyasaland. 



I must again record my acknowledgments of the assistance given 

 me by Mr. C. H. Wright in preparing the manuscript for the press and 

 in checking the proofs, and to Mr. N. E. Brown for working out the 

 geographical distribution. 



For the detailed topography the third edition of the "Spezial- 

 karte von Afrika," Gotha : Justus Perthes, 1898, has been chiefly 

 used. 



W. T. T.-D. 



Kew, October 1904. 



