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LITERATURE CITED 



Drake, J. A. 1988. Biological invasions into nature reserves. 

 Trends in Ecology and Evolution 3: 186-187. 



Lesica, P. 1985. Report on the conservation status of Arabis 



f ecunda , a potential candidate species. Unpublished report 

 to the U.S. Fish and Wildlife Service, Office of Endangered 

 Species, Denver, CO. 



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

 perennial plant species in permanent belt transects. 

 Natural Areas Journal 7: 65-68. 



Massey, J. R. and P. D. Whitson. 1980. Species biology, the key 

 to plant preservation. Rhodora 82: 97-103. 



Mueller-Dombois, D. and H. Ellenberg. 1974. Aims and methods in 

 vegetation ecology. John Wiley and Sons, New York. 



Palmer, M. E. 1987. A critical look at rare plant monitoring in 

 the United State. Biological Conservation 39: 113-127. 



Rollins, R. C. 1984. Studies in the Cruciferae of western North 

 America II. Contributions to the Gray Herbarium 214: 1-18. 



St. Clair, L. L. , B. L. Webb, J. R. Johansen and G. T. Nebeker. 

 1984. Cryptogamic soil crusts: Enhancement of seedling 

 establishment in disturbed and undisturbed areas. 

 Reclamation and Revegetation Research 3: 129-136. 



Schassberger, L.A. 1988. An update of the report on the 

 conservation status of Arabis f ecunda , a candidate 

 threatened species. Unpublished report to the U.S. Fish and 

 Wildlife Service, Office of Endangered Species, Denver, CO. 



Sutter, R. D. 1986. Monitoring rare plant species and natural 

 areas - ensuring the protection of our investment. Natural 

 Areas Journal 6: 3-5. 



