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Kraemer: Morphology of the Genus Viola 



183 



further study will no doubt justify. As to whether these groups 

 include hybrids, or varieties of certain species, or eacli is deserv- 

 ing of the specific rank assigned to it further study alone will 

 demonstrate. It is to be hoped that no more species will be de- 

 scribed without a consideration of the morphological features of 

 the genus indicated in this paper. The study of this genus by 

 the author will be continued and he desires to acknowledge his in- 

 debtedness to Mr. C. D. Beadle, of Biltmore, N. C, and Mr. C. 

 H. La Wall, of Philadelphia, for some of the material furnished 

 for this investigation ; and to Miss Florence Xaple, of Philadel- 

 phia, for assistance in certain parts of the work. 



