10 ALLAN HANCOCK ATLANTIC EXPEDITION REPORT 



Distribution: Littoral, Jamaica to Colombia; type from "America 

 calidor." 

 Sporobolus pyramidatus (Lam.) Hitchc. 



Cubagua Island, April 14, Elmore Q6. Dry coralline rock and sand; 

 few. 



AMARANTACEAE 

 Alternanthera canescens HBK. 



Cubagua Island, April 15, Elmore Qll; a few plants on the dry sandy 

 upper beach. 



Distribution : Widely distributed in the arid tropics. 



CHENOPODIACEAE 

 Atriplex pentandra (Jacq.) Standi. 



Cubagua Island, April 15, Elmore Q12; dry sandy soil on the upper 

 beach. 



Distribution: Florida through West Indies to northern South 

 America, type from sea shores of Cuba. 



NYCTAGINACEAE 

 Allionia incarnata L. 



Cubagua Island, April 13-14, Elmore QIO; sandy soil on the upper 

 beach. 



Distribution : Widespread in arid regions from southwestern United 

 States to South America. 



AIZOACEAE 

 Trianthema portulacastrum L. 



Cubagua Island, April 15, Elmore Q15; sandy soil on the upper beach. 

 Distribution : Widely distributed in tropical America, Asia, Africa. 



ZYGOPHYLLACEAE 

 Tribulus terrestris L. 



Cubagua Island, April 15, Elmore Q14; dry upper beach. 

 Distribution : Widespread in the tropics of the New World. 



SIMAROUBACEAE 

 Castela Nicholsoni Hook. 



Cubagua Island, April 14, Elmore Q3. 



Distribution: West Indies, the type from Antigua. 



Elmore noted a few shrubs in grassland on level dry clay soil. John- 

 ston collected it on both Margarita and Coche. 



