46 
Transactions of the Royal Society of South Africa. 
P. E divs. The former extends from Port Elizabeth eastwards to Natal, 
the latter from Van Stadens to the Transkei. The third genus, Guthriea 
Bolus, is absent. It is only known from the Oudeberg near Graaff Reinet. 
Loasaceae. 
This order is represented in Africa only by the endemic genus Kissenia 
R. Br. found in the Western Region. 
Begoniaceae. 
Begonia L. is found in the East and North-East, extending to the mouth 
of the Kei River. 
OPUNTIALES. 
Cactaceae. 
The only native genus, Rhi]jsalis Gaertn., extends from the mouth of the 
S. John's River towards the Tropics. Several species of Opuntia Haw. are 
naturalised and are abundant in the south-eastern parts of the central 
region. 
MYRTIFLORAE. 
Geissolomaceae (endemic in South Africa). 
Geissoloma Lindl. et Kunth, the only genus, which, moreover, is mono- 
typic, occurs only in the Swellendam and Riversdale divs. 
Penaeaceae (endemic in South Africa). 
The occurrence of the Penaeaceae with five species of Penaea L. in the 
Uit. and P. E. divs. is of great interest as they are restricted to the south- 
west coast region." None of them are found east of the Uit. div. The four 
other genera are not found east of Swellendam. 
Oliniaceae. 
The only genus, Olinia Thunb., is represented in the Uit. and P. E. divs. 
by the widely-spread, very variable species which has served as the type for 
the genus. It extends from the Cape Peninsula through the coast districts 
to Natal, the Transvaal, and beyond. 
Thymelaeaceae. 
Arthrosolen C. A. Mey., Passerina L. (endemic), Gniclia L. and Lasio- 
siphon Fresen. have fairly general distribution in South Africa ; the last is 
absent from the western region and the Cape Peninsula. Ohrymococca 
Meisn. (endemic) is found at Simons Bay and in the Van Rhynsdorp div., 
Cryptadenia Meisn. (endemic) in the South-west, extending to the Cold 
Bokkeveld, but not reaching Swellendam, Lachnaea L. (endemic) in the 
South-west extending to the Cold Bokkeveld and eastwards to the P. E. div., 
