rian of the Farlow Reference Library, for her assistance at all times. I am 

 indebted to Mrs. Joyce H. Jones, Assistant Curator of the University 

 Herbarium, University of Michigan, for the loan of herbarium specimens 

 and for information concerning herbarium specimens; also to Dr. D. E. 

 Stuntz of the University of Washington, for the loan of herbarium speci- 

 mens from the Herbarium of the University of Washington. 



Grace E, Howard 

 Wellesley College Associate Professor of Botany 



July, 1946 



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