A. LITERATURE CITED 



Alt, D. and D. W, Hyndman. 1986. Roadside geology of Montana. 

 Mountain Press, Missoula, MT. 



Boggs, K. W. and J. M. Story. 1987. The population age 

 structure of spotted knapweed (Centaurea maculosa ) in Montana. 

 Weed Science 35: 194-198. 



French, R. A. and J. R. Lacey. 1983. Knapweed, its cause, 



effect and spread in Montana. Montana State University, 



Cooperative Extension Service, Circular 307, Bozeman, Montana, 

 USA. 



Harris, P. and R. Cranston. 1979. An economic evaluation of 

 control methods for diffuse and spotted knapweed in western 

 Canada. Canadian Journal of Plant Science 59: 375-382. 



Hamilton, M. B. and T. Mitchell-Olds. 1990. Population biology 



of Arabis fecunda, a rare endemic. 1. Directional selection and 



interspecific competition. University of Montana Herbarium and 



Center for Plant Diversity Publication No. 104, Missoula. 



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

 1964. Vascular plants of the Pacific Northwest. Part 2: 

 Salicaceae to Saxif ragaceae. University of Washington Press, 

 Seattle. 



Kelsey, R. G. and D. Bedunah. 1989. Ecological significance of 

 allelopathy for Centaurea species in the northwestern United 

 States. Pages 10-23 in P. K. Fay and J. R. Lacey, editors. 

 Proceedings of the Knapweed Symposium. Montana State University, 

 Cooperative Extension Service Bulletin No. 1315, Bozeman, 

 Montana, USA. 



Kelsey, R. G. and L. J. Locken. 1987. Phytotoxic properties of 

 cnicin, a sesquiterpene lactone from Centaurea maculosa (spotted 

 knapweed). Journal of Chemical Ecology 13: 19-33. 



Leeper, D., D. Pavek, R. Walsh and T. Mitchell-Olds. 1993. 

 Preliminary report of combined demographic and genetic analyses 

 for management of Arabis fecunda . In Plants and their 

 environment in the Greater Yellowstone Ecosystem. National Park 

 Service Transactions. 



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

 fecunda , a potential candidate species. Report to the U.S. Fish 

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



Lesica, P. 1993. Effects of grazing on Arabis fecunda, 1993 

 progress report to Bureau of Land Management, MT . Montana 

 Natural Heritage Program, Helena. 



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