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B. PRESENT LEGAL OR OTHER FORMAL STATUS 



1. State: The Montana Natural Heritage Program ranks the 

 species G3 and SI meaning that it is somewhat vulnerable on 

 a global scale due to a limited range, but it is critically 

 imperiled within the state due to extreme rarity (Heidel 

 1994) . 



2. Federal 



a. U.S. Fish and Wildlife Service: 3C (UDSI Fish and 



Wildlife Service 1993); This signifies that the species 

 has "proven to be more abundant or widespread than 

 previously believed and/or ....( is ) not subject to any 

 identifiable threat." 



b. Bureau of Land Management: Lomatium attenuatum is 



included on the BLM ' s list of proposed Montana 

 sensitive species (USDI Bureau of Land Management 

 1993) . 



c. U.S. Forest Service: none 



C. GEOGRAPHIC DISTRIBUTION 



1. Species range: The species is known only from Park County 

 in northwestern Wyoming (Evert 1983, Dorn 1992) and from 

 Beaverhead County in southwestern Montana. 



2. Montana distribution: Lomatium attenuatum was first 

 discovered in the state in 1993 by Peter Lesica on BLM land 

 in the Tendoy Mountains (Vanderhorst and Lesica 1994). 

 Additional populations were found in 1994 in the Tendoys 

 (Vanderhorst 1995a, and P. Lesica, pers. commun. ) and near 

 Bannack. 



3. Occurrences in the study area: A population was located on 

 the limestone ridge above the cemetery, overlooking 

 Hangman's Gulch. Most of the population area lies on BLM 

 land outside of present Bannack State Park boundaries, but a 

 small part is within the park boundaries shown on the USGS 

 Bannack 7.5' quadrangle. Most of the population is within 

 the boundaries of the current Recreation and Public Purposes 

 Patent application. An Element Occurrence Record and 

 topographic map showing the precise location of the 

 population are given in Appendix D. 



D. HABITAT 



1. Associated vegetation: The Beaverhead County populations of 

 tapertip biscuitroot occur in limber pine (Pinus f lexilis ) 

 and Mountain Mahogany ( Cercocarpus ledif olius ) communities. 



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