38 
Transactions of the Boyal Society of South Africa. 
ing genera Acaena Yahl., Grielum L. have western and north-western dis- 
tribution, Potentilla L. is only found on the Orange Eiver, while all the 
others are eastern or north-eastern, though Geum L. is already found near 
Grahamstown, Leucosidea E. and Z. near Cathcart, and Pygeiim Graertn. at 
Fort Cuninghame. 
Leguminosae. 
Suborder Mimosaceae. 
The genus Acacia only is recorded from the Uit. and P. E. divs. It 
radiates from tropical Africa into temperate South Africa. Two species are 
still found near Uitenhage, one of which extends also further west, but is 
only doubtfully native on the Cape Peninsula. All other genera are found 
in regions adjoining the Tropics, Elephantorrhiza Benth. penetrating to the 
Cradock district. 
Suborder Caesalpiniaceae. 
These have a similar distribution as the Mimosaceae. The genera 
Cassia L. and Schotia Jacq. are found in the Uit. div., neither of which 
appear to be recorded west of our districts ; Schotia speciosa occurs, howeYer,. 
at Mossel Bay. 
Suborder Papilionaceae. 
These show to a certain extent a similar distribution to the two preceding 
suborders, and consequently there are a large number of genera only found 
in regions adjoining the Tropics or penetrating more or less in a south- 
westerly direction ; but, in addition, there is a fairly large number of genera^ 
some represented by an enormous number of species found in all South 
African floral regions, and, lastly, there are a number of endemic genera, 
especially in the south-west coast region, some of which are not even 
nearly related to tropical Africa genera. All genera distributed widely in 
South Africa are recorded from the Uit. and P. E. divs., some of them — e.g. 
Lotononis Benth., Aspalathus L., Argyrolohium E. and Z., Psoralea L.^ 
Indigofera L., Lessertia L., Uhynchosia Lour. — with more or less numerous 
species. 
Amongst the genera which penetrate westward from Natal Buchenroe- 
dera E. and Z., Eriosema E. Mey., Erythrina L., and Calpurnia E. Mey. find 
their western limit in our districts. Lotus L., and Bichilus DC. penetrate 
to near their eastern borders and may yet be found in them, while Crota- 
laria L. and Vigna Lavi penetrate much further west, the former reaching 
the Cape Peninsula with one species. 
Dealing now with the genera of essentially south-western distribution, 
we find that Liparia L., Euchlora E. and Z., Walpersia Harv., Hypocalyptus 
Thunb., Loddigesia Sims, Vihorgia Thunb., Fagelia Neck, are absent. 
