THE AUTHORS 



DAVID L. HANKS was a Plant Physiologist in 1969 and 1972 for the Intermountain 

 Forest and Range Experiment Station in Ephraim, Utah. He received his 

 B.S. degree in Botany (1962) and M.S. degree in Chemistry (1963) from 

 Brigham Young University. He obtained his Ph.D. in Plant Physiology (1966) 

 from the University of Michigan. Between 1966 and 1969, he taught mycology 

 and plant physiology at Brigham Young University. He is presently Assistant 

 Professor of Microbiology, Division of Science, at Northeast Missouri State 

 University, Kirksville, Missouri. 



E. DURANT McARTHUR is a Research Geneticist for the Intermountain Station at 

 Ephraim. His degrees are from the University of Utah: B.S. in Genetics and 

 Cytology (1965), M.S. in Molecular and Genetic Biology (1967), and Ph.D. in 

 Biology (1970). He was a Postdoctoral Research Fellow of Agricultural 

 Botany at the University of Leeds, United Kingdom, in 1970-1971. He joined 

 the Station in 1972. 



RICHARD STEVENS is a Game Biologist for the Utah Division of Wildlife Re- 

 sources. He received his B.S. degree in Range Management (1965) from 

 Brigham Young University, and his M.S. degree in Range Management (1968) 

 from the University of Arizona. From 1968 to 1969 he was a Range Conser- 

 vationist with the USDA Forest Service. He has been in his present position 

 since 1969. 



A. PERRY PLUMMER is a Range Scientist for the Intermountain Station at 

 Ephraim. He has worked in range research for the Station since 1936. He 

 received his B.S. degree (1935) and his M.S. degree (1939) in Botany from 

 the University of Utah. His research has been principally concerned with the 

 restoration of western ranges. 



ACKNOWLEDGMENT 



We thanlv R. Drobnick and R. B. Ferguson, and Drs. R. G. Krebill, E. Schlatterer, 

 H. C. Stutz, and R. K. Vickery, Jr., for critically reviewing an earlier draft of 

 this paper. This work was facilitated by use of study plots on land belonging to 

 the Utah Division of Wildlife Resources and the Snow Field Station of the Utah 

 Agricultural Experiment Station and of Snow College. Some plant material was 

 collected and/or identified by A. C. Blauer, B. C. Giunta, K. R. Jorgensen, 

 A. McLean, and G. A. Van Epps. 



