UGANDA BOUNDARY COMMISSION. 117 
that by Col. Grant, on the Speke and Grant Expedition of 1860 * 
partly on the north-western shore of the Victoria Nyanza, 
between what was then called the river Kitangule (now called 
Kagera) and M'tesas. Other collectors who have visited this 
region are Mr. G. F. Seott Elliot on his return from his expe- 
dition to Mt. Ruwenzori, and Dr. Stuhlmann on the Emin Pasha 
Expedition. Lieut. Stairs, on the Stanley Expedition in 1890, 
and several others have also collected plants in Uganda. 
In Sir Harry Johnston’s book on Uganda t, Mr. C. H. Wright, 
A.L.S., has given a list of the plants known from the Protectorate. 
Sir Harry Johnston recognises five Botanical Regions in the 
Uganda Protectorate :— 
(1) Somarı Reaion.—Includes the arid country in the basin of 
Lake Rudolf and up the Rift Valley as far as the north 
end of Lake Baringo. 
(2) East ArnicAN Reaion.—A land of grass, Borassus, Hy- 
plene, and wild Date Palms, &c. characteristic of the low- 
lying parts of German, Portuguese, and British East Africa. 
(3) CENTRAL AFRICAN Raarow.—This fertile region presupposes 
an average altitude of 3500 ft. in the equatorial regions of 
Uganda. 
(4) West ArnrcaN Forest Recron. — Characteristic of the 
countries near the shore of the Victoria Nyanza. 
(5) Puareav or ArPrINE RkGroN.— Everywhere between 6500 
and 10,000 ft., with a flora which alternately recalls the 
trees and plants of temperate South Africa and temperate 
Abyssinia. 
The island of Buvüma comes under the West African Forest 
Region, the higher portion of the Ruchigga district and the hill 
Irunga reach the Alpine Region; but much of the country covered 
by the Expedition is in the Central African Region. 
As a whole, the entire country explored lies in the northern 
part of the Central Lake Region, Engler's “ Seengebiet,” repre- 
senting that portion of it which is included in the Nile Land 
District of Oliver’s ‘ Flora of Tropical Africa.’ 
The collection comprises 480 species of Seed-plants, of which 
67 are new to science, and includes 433 Dicotyledons, 46 Mono- 
* Botany, by Prof. D. Oliver, in Trans. Linn. Soc. vol. xxix. (1872-t). 
t Sir Harry Johnston; The Uganda Protectorate, 1902. 
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