NO. 6 GENTRY : LAND PLANTS 9 



CACTACEAE 

 Cactus intortus Miller ? 



Tortuga Island, April 14-15, Elmore P4. 

 Insufficient material for certain identification. 



COMBRETACEAE 



CONOCARPUS ERECTUS L. 



Tortuga Island, April 14-15, Elmore P9. 



Distribution : Littoral of tropical America and west Africa. 



THEOPHRASTACEAE 

 Jacquinea barbasco (Loefl.) Mez. 



Tortuga Island, April 14-15, Elmore P8. 



Distribution : Islands of the southern Caribbean. 



Collections made from a few plants growing in the sandy soil over the 

 coralline rock. 



BORAGINACEAE 

 Heliotropium angiospermum Murr. 



Tortuga Island, April 13, Ehnore P2; among dry grass on coral atoll. 



Distribution: Widely distributed in the tierra caliente of tropical 

 America. 



RUBIACEAE 

 Erithalis fructicosa L. 



Tortuga Island, April 13, Elmore PI ; on coral rocks of the upper 

 beach. 



Distribution: West Indies. 



This collection marks an extension of range for the species and adds 

 a new genus to the flora of South America. 



CUBAGUA ISLAND, VENEZUELA 

 GRAMINEAE 

 Cenchrus pilosus HBK. 



Cubagua Island, April 13-14, Elmore Q4. 



Distribution: Mexico to Colombia and Venezuela; type from Vene- 

 zuela. 

 Leptothrium rigidum Kunth. 



Cubagua Island, April 13-14, Elmore 05. Boulders in dry, hot wash; 

 few plants. 



