13 

 IV. LITERATURE CITED 



Achuff, P. 1991. Plant species of special concern. Montana 

 Natural Heritage Program, Helena. 2 pp. (mimeo) . 



Alt, D.A. and D.W. Hyndman. 1980. Preliminary geologic map of 

 the Dillon 1° X 2° quadrangle, Montana. MBMG 52. Montana 

 Bureau of Mines and Geology, Butte, Montana. 2 sheets. 



Cronquist, A.J. 1991. Letter to Lisa A. Schassberger (11 March), 

 concerning annotation of Cirsium specimens, Montana Natural 

 Heritage Program, Helena. 



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

 Publishing, Cheyenne, Wyoming. 276 pp. 



Gardner, R.D. 1974. Systematics of Cirsium (Compositae) in 

 Wyoming. Madrono 22:239-265. 



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

 1955. Vascular Plants of the Pacific Northwest. Vol. 5. 

 University of Washington Press, Seattle. 



Moore, R.J., and C. Frankton. 1963. Cytotaxonomic notes on some 

 Cirsium species of the western United States. Canadian 

 Journal of Botany 41:1553-1567. 



Pfister, R.D., B.L. Kovalchik, S.F. Arno, and R.C. Presby. 1977. 

 Forest Habitat Types of Montana. General Technical Report 

 INT-34, Intermountain Forest and Range Experiment Station, 

 Ogden, Utah. 174 pp. 



Schassberger, L. A. 1991. Rare plant inventory of the East 

 Pioneer Mountains, U.S. D.A. Forest Service - Region 1, 

 Beaverhead National Forest. Montana Natural Heritage 

 Program, Helena, MT. 55 pp. 



Scholten, R. , K.A. Keenmon, and W.O. Kupsch. 1955. Geology of 

 the Lima Region, southwestern Montana and adjacent Idaho. 

 Bulletin of the Geological Society of America. 66:345-404, 

 and maps. 



Sonderegger, J.L., J.D. Scholfield, R.B. Berg, and M.L. Mannick. 

 1982. The upper Centennial Valley, Beaverhead and Madison 

 counties, Montana. Montana Bureau of Mines and Geology 

 Memoir 50, 53 pp. and maps. 



Turner, C.E., R.W. Pemberton, and S.S. Rosenthal. 1987a. Host 

 range and new host records for the plume moth Platyptilia 

 carduidactyla (Lepidoptera: Pterophoridae) from California 

 thistles (Asteraceae) . Proc. Entomol . Soc. Wash. 89(1): 

 132-136. 



