D. Identifying characteristics of material which is 

 in interstate or international commerce or trade: 

 No interstate or international commerce or trade 

 known. 



E. Photographs and line drawings: Figure 1 is an 

 illustration of Lesquerella humilis . The color 

 slides included are duplicates of those taken at 

 the sites indicated. Additional slides are on 

 file at the Montana Natural Heritage Program 

 office in Helena. 



Significance 



A. Natural: Lesquerella humilis is a state endemic 

 that is narrowly restricted to three peaks that 

 are approximately six miles apart. It is well 

 separated from its nearest relative, L. 

 hemiphysaria which occurs in Utah. Thus, it is an 

 important taxon for studies of biosystematics and 

 the evolutionary biology of narrow endemics. 

 Obligate relations with other species are unknown. 



B. Human: Lesquerella humilis is of scientific 

 significance for biosystematic studies. It has 

 potential, horticulturally, as a rock garden 

 plant. Other agricultural, economic or other 

 human uses or significance are not known 

 currently. 



Geographical distribution 



A. Geographical range: Lesquerella humilis is a 



state endemic, narrowly restricted to three sites 

 in the Bitterroot Range in northwestern Ravalli 

 County, Montana (Figure 2) . All of these sites 

 are on the Bitterroot National Forest, in Region 1 

 (Northern Region) of the U.S. Forest Service. 



