ACKNOWLEDGMENTS 



Field studies of Ervlhroxvlum Leal-costae and E. occultwn in 

 Brazil were supported largely by the Field Museum of Natural 

 History. I would like to thank the following individuals and 

 institutions for their cooperation and invaluable assistance in 

 conducting this research: Pedrito Silva, Gustavo E. M. Almeida 

 and Larry Noblick (Salvador, Bahia); Andre M. de Carvalhoand 

 L. A. Mattos Silva (CEPLAC, Itabuna, Bahia); J. Pedro P. 

 Carauta and the staff of Centro do Botanico do Rio de Janeiro); 

 Adelmar F. Coimbra Filho (Rio de Janeiro), Elsie Franklin 

 Guimaraes, Haroldo C. de Lima and Gustavo Martinelli (Jardim 

 Botanico do Rio de Janeiro) and Dimitre Sucre (Rio de Janeiro). 

 I am grateful to Julian A. Steyermark and Howard L. Clark for 

 providing specimens of Erythroxyliini hypoleucum. 1 am grateful 

 to the curators of the following herbaria who kindly lent speci- 

 mens essential to this study: A, ALCB, CEPEC, F, IAN, INPA, 

 MO, NY, RBand VEN. 



REFERENCES 



Morawetz. W., in press. Dispersal and succession in an extreme tropical 

 habitat: coastal sands and xeric woodlands in Bahia (Brazil). Abh. Natur- 

 wiss. Naturwiss. Verein Hamburg. 



Schulz, O. E.. 1907. Erythroxylaceae. In A. Engler, Das Pflan/enreich 

 4(134): 1 176. 



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