21 



III. LITERATURE CITED 



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

 Publishing, Cheyenne, Wyoming. 276 pp. 



Hitchcock, C.L., A. Cronquist, and M. Ownbey. 1969. Vascular 

 Plants of the Pacific Northwest, Part 1. University of 

 Washington Press, Seattle. 914 pp. 



Lesica, P., G. Moore, K.M. Peterson, and J.H. Rumely. 1984. 



Vascular Plants of Limited Distribution in Montana. Monograph 

 No. 2, Montana Academy of Sciences, Supplement to the 

 Proceedings, Vol. 43. 61 pp. 



Lesica, P. 1987. A technique for monitoring nonrhizomatous, 



perennial plant species in permanent belt transects. Natural 

 Areas Journal 7: 65-68. 



Luer, C.A. 1975. The Native Orchids of the United States and 

 Canada. The New York Botanical Garden, Bronx, New York. 3 61 

 pp. 



Shelly, J.S. 1988. Plant Species of Special Concern. Montana 

 Natural Heritage Program, Helena. 12 pp. (mimeo) . 



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



Temperature, Precipitation, and Heating and Cooling Degree 

 Days 1951-80. National Oceanic and Atmospheric Administration, 

 Climatography of the United States No. 81. 23 pp. 



Veseth, R. , and C. Montagne. 1980. Geologic Parent Materials of 

 Montana Soils. Montana Agricultural Experiment Station, 

 Montana State University, and U.S.D.A. Soil Conservation 

 Service, Bulletin 721. 117 pp. 



Williams, J.G., and A.E. Williams. 1983. Field Guide to Orchids 

 of North America. Universe Books, New York. 14 3 pp. 



