THE FLORA OF THE TURKS ISLANDS 291 



Canavalia obtusifolia (Currents). 

 Cenchrus echinatus (Birds, in plumage). 

 Conocarpus erectus (Currents). 

 Cor chorus hirsutus (Drifting logs and man). 

 Dodoncca viscosa (Currents, man, etc.). 

 Guilandina bonducella (Currents). 



Heliotropium curassavicum (Floating logs, pumice, man). 



I pom as a pes-caprce (Currents). 



Laguncularia racemosa (Currents). 



Portulaca oleracea (Floating logs, pumice, man). 



Rhizophora mangle (Currents). 



Sccevola plumieri (Currents and frugivorous birds). 

 Sesuvium portulacastrum (Floating logs, pumice, man). 

 Sophora tomentosa (Currents). 

 Suriana maritima (Currents and floating logs). 

 Thespesia populnea (Currents and man). 



The shore plants confined to the New World, and as a rule widely- 

 spread over the West Indies, include — 



Ambrosia crithmifolia (Drifting logs and man). 



Batis maritima (Currents and man). 



Borrichia arbor escens (Drifting logs and man). 



Cakile lanceolata (Currents for a few hundred miles). 



Coccoloba uvifera (Currents and frugivorous birds for distances 

 not exceeding 200 miles). 



Cyperus brunneus (Birds, per pedes et intestina, Millspaugh). 



Ernodea littoralis (Frugivorous birds; capacity for dispersal 

 by currents not tested). 



Euphorbia buxifolia (Attached to feet of birds, Millspaugh; 

 probably also drifting logs and man). 



Genipa clusiifolia (Currents to a small extent, iguanas, frugivor- 

 ous birds, and man). 



Ipomoea tuba (Currents. It is regarded by Urban as also an 

 Old World plant). 



Rhachicallis maritima (Means of dispersal unknown, but pro- 

 bably not by currents). 



Salicornia ambigua (Currents, feet of birds, man. By some 

 regarded as a form of S.fruticosa, an Old World species). 



Tournefortia gnaphalodes (Currents). 



Uniola paniculata (Regarded by Millspaugh as dispersed by 

 currents; but no experiments have been made, and pro- 

 longed floating powers seem unlikely). 



(Most of these plants are specially discussed in other pages of this 

 work. Some of the small seeded species are dealt with in Note 21 

 of the Appendix, and others like Batis maritima in my work on 

 Plant Dispersal.) 



The association of considerable powers of dispersal by currents 

 with existence in the Old World is especially noteworthy. Three- 

 fourths of the littoral shore plants that occur not only all over the 



