Origin of the Angiosjyermotts Flora of South Africa. 329 



in America. The main region of distribution is always within the 

 south temperate zone, and here the most nearly allied genera are 

 found. Ehrharta is restricted almost entirely to South Africa with 

 the exception of one species which probably has spread as a weed as 

 far as India. The nearest relations, Microlcena and Tetrarrhena, 

 little more than dimerous modifications of EJirJiarta, are peculiar 

 to Australasia. Tetrarrhena is restricted to Tasmania and West 

 Australia. Microlcena, on the other hand, extends from Tasmania, 

 through Australia and New Zealand, to the mountains of New 

 Guinea. A further similar case which refers to a sub-tropical 

 type is Potamophila, which has one species in South Africa, one 

 in Madagascar, and one in South-East Australia. 



This relationship amongst Southern Temperate types and their 

 radiation from the South is also plainly shown in various other 

 orders, the distribution of which we will now briefly consider. 



Proteace^ 



(after Engler, in Engler-Prantl, Natiirl. Pflanzenfam.). 



960 species : 591 in Australia, 25 in Tropical East Africa, a few in 

 Angola, 2 in New Zealand, 7 in Chile, 36 in Tropical South America, 

 262 in South- West Cape Colony, 2 in Madagascar, about 5 on the 

 mountains of Tropical Africa. 



I. PersoonioidecB. 



1. Persooniece. 



6 genera in Australasia, 1 in New Caledonia, 1 in Madagascar, 

 1 {Braheium) in South Africa. 



2. FranklandiecB. 



1 genus in West Australia. 



3. ProteecB. 



4 genera in Australia, the others {Sorocephalus , Nivenia, Serrioriay 

 Mimetes, Spatalla, Faurea, Protea, Leucosyermiim, Leucadendro^i^ 

 Aidax) in South Africa {Faurea, Protea, and Leucospermum extending 

 into Tropical Africa). 



4. Conospermece. 



2 genera in Australia. 



II. GrevilloidecB. 



1. GrevillecB. 



10 genera in Australia, 1 in Eastern Tropical Asia, 1 in Tropical 

 America and New Caledonia, 2 in Tropical America, and 1 in 

 Chile. 



2. EmbothriecB. 



1 genus in South- Western America from Chile to the Straits of 



22 



