ACKNOWLEDGMENTS 
We would like gratefully to acknowledge the help and 
encouragement of our families and friends in the United 
States and Mexico who generously supported our studies. 
A special thanks is extended to those Tarahumara who 
through friendship shared their knowledge. Without the 
continual encouragement and critical evaluation of Pro- 
fessor C. W. Pennington, Department of Geography, 
Texas A & M University, the research upon which these 
notes are based might have faltered. Professor Richard 
Evans Schultes, Botanical Museum, and Dr. Bernice 
Schubert, Arnold Arboretum, kindly read the manu- 
script and offered suggestions. Robert Bye would like 
personally to thank Dr. Margaret A. Towle, Curator of 
the Ethnobotanical Laboratory of the Botanical Mu- 
seum, for her support and valuable suggestions. Financial 
support between 1971 and 1974 was generously extended 
to Robert Bye by the Botanical Museum and the De- 
partment of Biology, Harvard University, the National 
Geographic Society and the National Science Founda- 
tion Grant GB-35047 for Improvement of Doctoral 
Dissertation Research. 
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