1917] MacCAUGHEY—HAWAIIAN FLORA 113 
Aboriginal introductions 
Any outline of the Hawaiian flora would be seriously defective 
that did not give prominence to the numerous plant introductions 
by the primitive Hawaiians in their migrations from Samoa and 
the South Seas. Carefully gathered historical evidence has 
established the fact that during a long period of time, probably 
several centuries, the ancient Hawaiians maintained intercourse 
with their kinfolk in the South Pacific, making the long voyages 
in their splendid canoes. During this eventful period of migration 
and intercourse with the south, about 25 species of useful plants 
were consciously introduced by the natives, and perhaps a much 
larger number unconsciously brought in as seeds and spores. 
The list includes :° 
*Colocasia esculenta; the taro; starchy corms used for food. 
Ipomoea Batatas; sweet potato; many native varieties. 
*Musa sapientum banana; many native varieties. 
ocarpus incisa; breadfruit tree; 
*Cocos nucifera; cocoanut palm; formerly ony common. 
*Dioscorea sativa; yam; starchy tubers; climbing vine. 
*Dioscorea i yam; starchy tubers; climbing vine. 
*Alocasia n 
