North flanks of Anderson Hill signify potential habitat with the 

 highest probability of havinig had stable wet environments. 



The Anderson Hill record represents a state significant range 

 extension of the species in terms of elevation. It also presents a 

 need to review the variety nomenclature as applied in Montana. The 

 specimen will be sent off for verification as C. c. var. parviflorum , 

 with the cooperation of the University of Montana Herbarium, to 

 confirm the correct identification to variety of the original 

 specimen. Annotation information will be conveyed to the Bureau of 

 Land Management, and information on the species will continue to be 

 maintained and pursued by the state under the current state rank. 



VI . RECOMMENDATIONS 



Further survey work for Cypripedium calceolus is not warranted within 

 the Anderson Hill area, barring unlikely discovery of intact habitat 

 too small to discern on aerial photos. 



Status of Cypripedium calceolus belongs in the category of species 

 which are potentially extirpated on BLM-administered lands and which 

 warrant conservation protection if found elsewhere in the future. 



IV. LITERATURE CITED 



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

 Publishing. Cheyenne, WY. 276 pp. 



Hitchcock, C.L., A. Cronquist, M. Ownbey and J.W. Thompson. 1984, 4th 

 ed. Vascular Plants of the Pacific Northwest, Part 1. University of 

 Washington Press. Seattle, WA. 



Kartesz, J.T. and R. Kartesz. 1985. A synonymized checklist of the 

 vascular flora of the United States, Canada, and Greenland. 

 University of North Carolina Press, Chapel Hill. Unpubl. 



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

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



Macgrath, L. K. 1973. The native orchids of the prairies and plains 

 region of North America. Ph.D. thesis. Univeristy of Kansas. 

 Lawrence. 



Montana Natural Heritage Program. 1992. Montana plant species of 

 special concern. Montana Natural Heritage Program, Helena, MT. 

 Unpubl . 



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

 precipitation, and heating and cooling degree days 1951-1980. 

 National Oceanic and Atmosheric Administration, Climatography of the 

 United States No. 81. 23 pp. 



