Management Considerations 



The three sites on the west side of the Humbug Spires appear to be subject to very 

 little human-caused disturbance. Sites are grazed by cattle, but are little impacted because of 

 the lack of forage. The Reservoir Site has a primitive road through the north (state-owned) 

 end. The South Fork Site shows evidence of historic mining activity. The Moose Creek Site 

 has mining claims and is grazed by livestock. There are numerous trails on the south-facing 

 slopes, but the effect of these disturbances on populations of A, fecunda is unknown. In 

 general, populations of A. fecunda in the Humbug Spires area do not appear threatened at this 

 time. 



Literature Cited 



Lesica, P. 1985. Report on the conservation status of Arabis fecunda , a potential candidate 

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

 Denver, CO. 



Lesica, P. and J. S. Shelly. 1991. Sensitive, threatened and endangered vascular plants of 

 Montana. Montana Natural Heritage Program Occasional Paper No. 1, Helena, MT. 



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

 to the Gray Herbarium 214: 1-18. 



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

 fecunda . a candidate threatened species. Report to the U.S. Fish and Wildlife Service, Office 

 of Endangered Species, Denver, CO. 



U.S. Department of Interior, Fish and Wildlife Service. 1990. Endangered and threatened 

 wildlife and plants; review of plant taxa for listing as endangered or threatened species; notice 

 of review. Federal Register 55 (35): 6184-6229. 



Peter Lesica 

 October, 1992 



