LITERATURE CITED 



Argus, G. W. and K. M. Pryer. 1990. Rare Vascular Plants in 

 Canada, Our Natural Heritage. Canadian Museum of Nature, 

 Ontario. 191 pp. plus maps. 



Booth, W. E. and J. C. Wright. 1966. Flora of Montana, Part II. 

 Montana State University, Bozeman. 305 pp. 



Crawford, D. J. 1975. Systematic relationships in the narrow- 

 leaved species of Chenopodium in the western United States. 

 Brittonia 27:279-288. 



Cronquist, A., A. H. Holmgren, N. H. Holmgren and J. L. Reveal. 

 1984. Intermountain Flora, Vol. 4. Subclass Asteridae. New 

 York Botanical Garden, New York. 



Cronquist, A., A. H. Holmgren, N. H. Holmgren and J. H. Reveal. 

 1994. Intermountain Flora, Vol. 6. Monocotyledons. New 

 York Botanical Garden, New York. 



Dorn, R. D. 1977. Flora of the Black Hills. Mountain West 

 Publishing, Cheyenne, WY. 377 pp. 



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

 Publishing, Cheyenne, WY. 276 pp. 



Dorn, R. D. 1992. Vascular plants of Wyoming, 2nd ed. Mountain 

 West Publishing, Cheyenne, WY. 340 pp. 



Fertig, W. 1994. Wyoming plant species of special concern. 

 Unpublished list. Wyoming Natural Diversity Database, 

 Laramie. 3 3 pp. 



Great Plains Flora Association. 1977. Atlas of the Flora of the 

 Great Plains. The Iowa University Press, Ames. 600 pp. 



Great Plains Flora Association. 1986. Flora of the Great Plains. 

 University Press of Kansas, Lawrence. 1392 pp. 



Hansen, P. L. and G. R. Hoffman. 1987. The vegetation of the 

 Grand River/Cedar River, Sioux, and Ashland Distrcts of Custer 

 National Forest: a habitat type classification. Gen. Tech. 

 Report RM-157. USDA Forest Service Rocky Mountain Forest and 

 Range Experiment Station. 68 pp. 



Heidel, B. L. 1990. Inventory of rare plant species in Theodore 

 Roosevelt National Park, Billings and McKenzie counties. 

 Unpublished report to National Park Service, North Dakota 

 Natural Heritage Inventory, North Dakota Parks and Recreation 

 Dept., Bismarck. 112 pp. 



92 



