THE AUTHORS 



ARTHUR H. HOLMGREN has been a member of 

 the Department of Botany and has been Director of the 

 Intermountain Herbarium at Utah State University since 

 1943. He is intimately acquainted with plant life of the 

 Intermountain region and adjacent States. He has pub- 

 lished five books and numerous professional articles on 

 plants in Utah and Nevada . 



JAMES L. REVEAL is a graduate of Utah State 

 University and is recognized as authority on the genus 

 Eriogonum . He has botanized extensively in the 

 Intermountain region and contiguous areas. 



ACKNOWLEDGMENTS 



Acknowledgment is given to Dr. W. O. Shepherd, 

 Miss Marguerite A. Israelson, Selar S. Hutchings, and 

 M. E. Lewis of the U.S. Forest Service, who helped in 

 numerous details of preparing and editing the manuscript. 

 Thomas Jensen is here acknowledged for the use of his 

 rough draft of a similar paper . 



Dr. Arthur J. Cronquist checked the manuscript of 

 the Compositae and several other families. Dr. C. L. 

 Hitchcock and Dr. R. J. Davis have given assistance 

 on Anemone patens and Claytonia rosea , respectively. 

 Most of their suggestions have been incorporated in this 

 publication. 



A. H. H. 



J. L. R. 



