MR. G. BENTHAM ON EUPHORBIACEiE. 



261 



(3) Widely cultivated plants : Phyllanthus distichus, Jatropha 

 Curcas, jRicinus communis, and Hura crepitans. 



2. Representative Genera in the New and the Old World. 

 The following genera are, as it were, representatives of each 

 other in the two continents. Although well distinguished by 

 positive characters, each one is as near as, or generally nearer to, 

 its representative in the other continent than to any other genus 

 in its own region. 



America. 



Amanoa, 5 species, tropical, besides 

 one true Amanoa in Africa. 



Discocarpus, 3 species, tropical. 

 Drypetes, 9 species, tropical and 



northern subtropical. 



H 



ieronyma, 8 to 10 species, tropical. 



Richeria, 3 species, tropical. 



Old World. 



Cleistanthus, 22 species, from Africa 

 to Australia and passing through 

 Bridelia into Phyllanthus. 



Lachnostylis 9 1 species, extratropi- 

 cal South Africa. 



Cyclostemon, 18 species, tropical 

 Africa and Asia ; and Hemicyclia 

 i) species, Indo- Australian region. 



Meesobotrya, 1 tropical African spe- 

 cies, connecting Hieronyma with 

 the Old- World Antidesma and its 



allies. 

 Thecacoris, 4 species, tropical Africa 

 and Madagascar, connecting TW- 



World 



tidesma and its allies. 



World 



All the above appear to be much more isolated in the New 

 than in the Old 

 African origin. 



Genera peculiar to each Continent, without near Representatives 



3. 



in the other. 



(1) America. — In the following enumeration I distinguish as 

 the Brazilian region the whole of tropical South America east of 



Indian includes 



West 



the Andes, including G-uiana; 

 sometimes the maritime districts of Columbia and Central Ame- 

 rica, though the peculiar genera are usually almost limited to 

 Cuba and Jamaica. The peculiar American genera of Eucrotonese 

 and Hippomanea?, and some others already noticed, are not here 



repeated. 



Piranh 



ea. 



1 species 



oocicon. 



P°9onophora. 

 Avellanita. 



I 



species 



1 species, 

 1 species 



Brazilian region. 



Chili. 



Brazilian region. 



Chili (connected with Aleuritesl). 



