LITERATURE CITED 



Dorn, R. D. 1984. Vascular plants of Montana . Mountain West 

 Publishing, Cheyenne, WY. 276 pp. 



. 1988. Vascular plants of Wyoming . Mountain West 



Publishing, Cheyenne, WY. 340 pp. 



Heidel, B. L. and J. M. Poole. 1993. Montana plant species 

 of special concern. Unpublished list. Montana Natural 

 Heritage Program, Helena, MT. 



Hitchcock, C. L. and A. Cronquist. 1973. Flora of the 

 Pacific Northwest . University of Washington Press, 

 Seattle, WA. 730 pp. 



Lesica, P. and J. S. Shelly. 1991. Sensitive, threatened, 

 and endangered vascular plants of Montana. Montana 

 Natural Heritage Program, Occasional Publication no. 1. 

 Helena, MT. 88 pp. 



Welsh, S. L. , N. D. Atwood, L. C. Higgins, and S. Goodrich. 



1987. A Utah Flora . Great Basin Naturalist Memoirs no. 

 9. Brigham Young University, Provo, UT. 894 pp. 



Whitson, T. D. , R. Reichenbach, M. A. Ferrell, S. D. Miller, 

 S. A. Dewey, J. O. Evans, and R. J. Shaw. 1987. Weeds 

 and poisonous plants of Wyoming and Utah . Cooperative 

 Extension Service, College of Agriculture, University of 

 Wyoming, Laramie, WY. 281 pp. 



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