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ACKNOWLEDGEMENTS. 



The authors of this bulletin are glad to avail themselves of; 

 this opportunity for expressing their thanks to Professor F. 

 Lamson Scribner for his determination of the grasses; to Mrs. Dr. 

 K. Branclegee of San Diego for aid in the determination of many 

 plants, and to Miss Alice Eastwood for courtesies and suggestions, 

 as well as for the use of the library and herbarium of the Cali- 

 fornia Academy of Sciences, and to Professor R. H. McDowell 

 for many helpful suggestions. 



