PREFACE. vii 
striking way the immense progress it has made in the interval. ‘“ For 
every three species then known, five species have since been added.” 
There is therefore already room for a supplement to the first three 
volumes of more than equal bulk. It would not be becoming for me to 
lay the burden on Kew. But it may be hoped that if, as may be con- 
fidently expected, it is able to complete the “ Flora of Tropical Africa ” on 
the lines already laid down, substantial encouragement will not be 
wanting from H.M. Government to enable the Kew statf to add further 
to our knowledge of the vegetable resources of a portion of the earth’s 
surface in which as a nation we have so large a stake. 
For the amended definition of the regions into which the area of the 
Flora is divided, reference may be made to the preface to the seventh 
volume. 
The further collections made use of in the present volume and not 
previously acknowledged are as follows: 
I. Upper Guinea.—Aug. Chevalier, French Guinea; C. &. Lane- 
Poole and C. W. Smythe, Sierra Leone; Aug. Chevalier, Ivory Coast ; 
J. Anderson, R. W. Brent, T. F. Chipp, A. E. Evans, A. C. Miles, 
and H. N. Thompson, Guld Coast; R. E. Dennett, H. Dodd, G. C. 
Dudgeon, J. H. J. Farquhar, Dr. Lamborn, J. C. Leslie, T. D. Mait- 
land, Mr. and Mrs, P. A. Talbot, N. W. Thomas, A. H. Unwin, and 
J. L. Williams, Southern Nigeria; Dr. J. M. Dalziel, Col. E. J. 
Lugard, Dr. A. C. Par-ons, B. E. B. Shaw, and C. C. Yates, Northern 
Nigeria. 
II. Norra Cenrrat.—Aug. Chevalier, Chari Region, Darbanda, 
French Congo, &c. 
III. Nite Lanp.—Dr. R. E. Drake-Brockman and R. J. Stordy, 
Southern Abyssinia ; A. F. Broun, Sudan; M.S. Evans. R. Fyffe, and 
C. B. Ussher, Uganda; E. Battiscombe, M. S. Evans, E. E. Galpin, 
D. E. Hutchins, H. Powell, and W. 8. Routledge, British East Africa. 
IV. Lower Guinea.—J. Gossweiler and Dr. F. G. Wellman, Angola ; 
E. E. Galpin, German South-West Africa, 
V. Sourn Cenrrat.—Rev. F. A. Rogers and F. Thonner, Belgian 
Congo. 
VI. Mozampique Distr.—J. T. Last, Zanzibar ; M. T. Dawe, W. H. 
Johnson, and J. Stocks, Portuguese East Africa; J. M. Parves, Nyasa- 
Jand; Mrs, O. Colville, E. E. Galpin, Miss L. S. Gibbs, Rev. Dr. F. C. 
Kolbe, H. G. Mundy, and Rev. F. A. Rogers, Rhodesia. 
The most cordial acknowledgments are due to Professor I. B. Balfour, 
Monsieur G. Beauverd, Professor A. Borzi, Dr. J. Briquet, Monsieur 
