14 



III. LITERATURE CITED 



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

 West Publ., Cheyenne, WY . 276 pp. 



Henderson, D.M., R.K. Moseley, and A.F. Cholewa. 1990. A 

 new Aqoseris (Asteraceae) from Idaho and Montana. 

 Syst. Bot. 15:462-465. 



Hitchcock, C.L., A. Cronquist, M. Ownbey, and J.W. Thompson. 

 1955. Vascular plants of the Pacific Northwest, vol. 

 V. Univ. Wash. Publ. Biol. vol. 17. Seattle, WA. 

 343 pp. 



Rydberg, P. A. 1922. Flora of the Rocky Mountains and 



adjacent plains. 2nd ed . Hafner Publ. Co., NY. 1143 

 pp. 



U.S. Department of Agriculture, Forest Service. 1988. 

 Sensitive plant field guide to northern Idaho and 

 Montana. Northern Region. Range, Air, Watershed, and 

 Ecology. Missoula, MT. 



U.S. Department of Commerce. 1982. Monthly normals of 

 temperature, precipitation, and heating and cooling 

 degree days, 1951-1980: Montana. National Oceanic and 

 Atmospheric Administration, Climatography of the United 

 States. No. 81. 23 pp. 



U.S. Department of Interior, Fish and Wildlife Service. 



1990. Endangered and threatened wildlife and plants; 

 review of plant taxa for listing as endangered or 

 threatened species; notice of review. Federal Register 

 Fed. Reg. 50 CFR Part 17: 6184-6229. 



