PREFACE. 
1+ 
As already explained, the large and constantly increasing mass of 
material having exceeded the space allotted to it, made it necessary to 
divide Volume IV of the “ Flora of Tropical Africa” into two sections, 
which, however, are themselves of equivalent bulk to volumes and 
“might have been numbered as such had not the plan on which it has 
been found advisable to prepare the work made this impracticable. 
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. 
In the prefaces to the first, the preceding section of this and 
succeeding volumes, will be found an enumeration of the materials 
employed up to 1868, and of the most important additions to them 
which have reached Kew since. 
The further collections cited in the present volume are : 
J. Upper Gurnea.—Sir H. H. Johnston, G.C.M.G., K.C.B., and 
H. Reynolds, Liberia; E. W. Foster and N. L. Phillips, Lagos; W. R. 
Elliott, Northern Nigeria; Capt. G. B. Gosling, Norman C. McLeod 
and H. N. Thompson, Southern Nigeria. 
III. Nive Lanp.—Lieut.-Col. A. F. Appleton, Dr. R. E. Drake- 
Brockman and Major D. Thomson, Somaliland; H. Brown, Bahr-el- 
Ghazal; Dr. A. G. Bagshawe, E. Brown and M. T. Dawe, Uganda ; 
Sir Evan James, K.C.I.E., C.S.I., Uganda and British East Africa ; 
C. F. Elliott, A. P. Grenfell, Claude Hollis and Andrew Linton, 
British East Africa. 
IV. Lower Gurnea.—Prof. H. H. W. Pearson, Damaraland. 
V. Sourn Crenrrat.—H. N. Ridley, plants collected by Major F. 
Chaves in the Congo State. 
VI. Mozampique.—J. F. Cunningham and Miss E. Kenyon, 
