PT ИЧРЕ EO REN: ЫС УА IR EE NRI ge Се 
ON CENTRAL-AFRICAN PLANTS. 15 
Cyperus margaritaceus, Vahl. South Kalahari, Transvaal, South-African Gold-fields, Upper Guinea, 
| and Damaraland. 
Panicum gossypinum, A. Rich. South Kalahari, Natal, and Abyssinia. 
P. nigropedatum, Munro. South Kalahari and South-African Gold-fields. 
P. insigne, Steud. South Africa and Abyssinia. 
Schmidtia quinqueseta, Benth. South Kalahari, Transvaal, Upper Guinea, Nileland, and Mozambique 
district of Tropical Africa. 
Eragrostis elata, Munro. South Kalahari, Orange Free State, Transvaal, Delagoa Bay, and South- 
African Diamond-fields, also Mozambique district of Tropical Africa and Angola. 
Andropogon eucomus, Nees ab Esenb. South-western districts of Cape Colony, Natal, Mozambique 
district of Tropical Africa, Upper Nileland, and Lower Guinea. 
For the purpose of these lists, the South-African Gold-fields, where no precise 
locality is given, are considered to belong to the south-central distriet of Tropical Africa. 
Moreover the Tropical Africa spoken of means that part of Africa contained between 
the tropics of Cancer and Capricorn ; and in this sense it is taken in Professor Oliver's 
‘Flora of Tropical Africa ;’ and it is not used to denote the botanical region of ** Tropical 
Africa and Natal” according to Grisebach, which includes part of the Transvaal, also 
Zululand and Natal, in addition to the part of Africa which is tropical in a geographical 
sense, with the omission, however, of a portion which belongs to the Kalahari region. 
On taking the general indications about the geographical affinities of the flora of this 
point of the upper Zambesi system which the first two lists above given supply, we may 
observe that, whereas only 4 species of the enumeration are peculiar to Tropical Africa 
(in the geographical sense), the various principal districts of that large area being mostly 
represented, with a slight preponderance in favour of Angola, so many as 15 species 
occur in Extratropical South Africa, and not again in Tropical Africa; of these 15 species 
7 oceur in the Transvaal, 7 in Cape Colony, 6 in South Kalahari, 4 in Zululand, and 3 
in Natal. Thus, such a limited view would make it appear that the flora of the upper 
course of the river Ninda is allied to that of Extratropical South Africa rather than to 
that of the greater part of Tropical Africa; and this alliance is illustrated in the collec- 
tion by the larger representation of Compositee as compared with Rubiaceze. On the other 
hand the high proportional number of Leguminose over that of the former of the other 
two natural orders points to a peculiarity of the flora of Tropical Africa as contrasted 
with that of Extratropical South Africa. 
From the third list it is found that of the species which are limited to Africa, but 
which occur both in Tropical Africa and in Extratropical South Africa, 7 species of the 
enumeration occur in the Transvaal, 7 in Nileland, 6 in South Kalahari, 6 in Natal, 4 in 
Lower Guinea, 4 in Cape Colony, 4 in South Central Tropical Africa otherwise than 
in this collection, 4 in the Mozambique district of Tropical Africa, 3 in Upper Guinea, 
2 at Delagoa Bay, 1 in Damaraland, 1 in the Orange Free State, and 1 in the South- 
African Diamond-fields. 
Three species of the enumeration occur both in Africa and Asia, but not in Australia, 
America, or Europe; 3 species occur both in Africa, Asia, and Australia, but not in 
America or Europe; 1 species occurs in Africa, Asia, and America, but not in Australia 
or Europe; 5 species occur both in Africa, Asia, Australia, and America, but not in 
Europe; 3 species occur both in Africa, Asia, Australia, America, and Europe; 1 species 
