XXV PITTOSPORUM 309 



The genera selected to represent this age are given in the 

 following table. Those on which my observations directly bear, or 

 in which I was particularly interested when in the Pacific, will be 

 discussed in detail from the standpoint of dispersal ; whilst only a 

 brief reference will be made to a few of the others, not, however, 

 from lack of materials at my disposal, but merely to keep this 

 volume within moderate bounds. 



Genera selected to represent the Age of Wide-dispersal of Indo- 

 Malayan or Malayan Plants over the Pacific, and possessing in 

 Hawaii only Endemic Species. — Most of the genera of this age are 

 exclusively from the tropics of the Old World, whilst those found 

 on both sides of the Pacific can be shown in most cases to have 

 been derived from the same source, and only very few, like 

 Pritchardia, can be traced to America. 



Pittosporum (Pittosporese). 

 Sapindus (Sapindacese). 

 Reynoldsia or Trevesia (Araliacese) 

 Gardenia (Rubiaces). 

 Psychotria (Rubiacese). 

 Cyrtandra (Gesneraceae). 

 Phyllanthus (Euphorbiacese). 

 Pritchardia (Palmacese). 

 Freycinetia (Pandanaceae). 



Pittosporum (Pittosporese). 



This genus, which contains nearly a hundred species, usually of 

 small trees, is widely spread in the warmer regions of Africa, Asia, 

 Australia, and New Zealand. It is also especially a genus of 

 oceanic islands, occurring not only in those of the Pacific but also 

 in Madeira and Teneriffe in the Atlantic. 



Though found in most of the larger Pacific groups, it has 

 apparently never been recorded from Samoa. From Hawaii 

 ten species are known, all peculiar to that group. About half 

 a dozen have been described from Fiji, of which three at least have 

 been observed outside the group in the neighbouring Tongan 

 Islands. Rarotonga possesses a peculiar species which, however, is 

 so near to two other Fijian and Tongan species that, according to 

 Cheeseman's memoir, they may have to be subsequently united. 

 Tahiti is credited by Drake del Castillo with a solitary species 



