METHODS 



Prior to fieldwork, a preliminary list of target plant species was 

 compiled to guide timing and selection of habitats to be searched 

 (Appendix 1) . This list includes all low-elevation candidate 

 sensitive species in the two counties, as well as candidate species 

 from adjoining counties that are on limestone substrate. State plant 

 species of special concern were considered only insofar as they 

 potentially have bearing on BLM goals and objectives. 



The study area was surveyed for sensitive plants May 28 and 30, and 

 June 7, 1994. Appendix 2 shows the primary search routes in the study 

 area. Emphasis was placed on evaluating typical, well-developed 

 limestone habitats, but field travel was also planned to sample the 

 range of elevations, moisture conditions and vegetation cover. 



The primary reference for identifying plants in the field was Dorn 

 (1984), augmented by Hitchcock and Cronquist (1973). Nomenclature 

 generally follows Dorn (1984), as updated by more recent taxonomic 

 works. When noteworthy plant species were found, notes were taken on 

 population numbers, stage, setting, associated species, and any 

 potential threats. Distribution was marked onto USGS 7.5' topographic 

 quad maps. Voucher specimens were collected for depositing at Montana 

 State University (MONT) and color slides were taken of the plant and 

 its habitat. 



