VEGETATION OF UGANDA. 585 
From the foregoing, it will be seen that considerable varia- 
tion is found in the formation of various parts of this littoral 
forest, as it stretches from a little north of the Equator to one 
degree south. 
Kokr. 
The district known as Koki lies to the south-west of Buddu ; 
it is exceedingly hilly and averages about 4500 feet altitude. 
Its formation is of grassland, woodland being only occasionally 
found in the deep ravines. The average maximum temperature 
in the shade during my stay in Koki (May) was 76°, aud 
the minimum frequently fell to 55^. In certain parts of Koki 
the soil is calcareous; in other parts, especially the hills, it is 
laterite, and schistose rocks crop up on the surface. 
The natives inhabit the valleys or low-lying parts of Koki, so 
that an overland view from the hills gives an appearance of 
desolation. I am informed by the White Fathers of the Roman 
Catholic Mission that the rainfall is less than that of Buddu, 
which is to be expected, seeing that it is destitute of forest. 
The following are conspicuous shrubs found in Koki :—Seeu- 
ridaca longipedunculata, Parinarium curatellifolium, Euphorbia 
antiquorum, Pappea ugandensis, Carissa edulis, Dichrostachys 
nutans, Gardenia Thunbergia, Erythrina tomentosa, Rhus 
insignis, Olea chrysophylla, Acacia Gerrardi, and two species of 
Dombeya (D. Mukole and D. Dawei). The latter affords a 
useful fibre known as Nkokwa; the former is a small tree also 
common in Chagwe in the Mahira Forest. A new species of 
Bersama, B. ugandensis, is found here; it is a small tree. 
The flora of Koki has a slight affinity to the flora of South 
Africa. Notable examples in my collection are Acacia G'errardi, 
a species from Natal and Zululand, not hitherto recorded 
from Tropical Africa; Pappea ugandensis, a species previously 
coliected by Dr. Bagshawe on the Anglo-German Boundary 
Commission, and allied to P. capensis. 
ANKOLE. 
Ankole lies in the Western Province of Uganda, and the 
portion I passed through has an altitude ranging from about 
4000 to 6000 feet. With the exception of the western parts of 
Ankole, the country is composed of rolling grass-hills and wide 
expanding valleys, while the extreme low-lying parts are usually 
LINN. JOURN.—BOTANY, VOL. XXXVII. 2Q 
