2. Pertinent fzunily synonym: Cruciferae. 



3. Common nzunes for the family: Mustard Family. 



C. Major plant group: Dicotyledoneae. 



D. History of knowledge of taxon: Lesguerella 

 humilis is a recently described species (Rollins 

 1984) . It was first discovered on St. Joseph Peak 

 in the Bitterroot Range in 1966, by Klaus H. 

 Lackschewitz and Tor Fageraas (Lackschewitz ( 117 . 

 MONTU) ) . This first specimen, and other early 

 collections, were variously labeled as Lesguerella 

 alpina . Physaria didvmocarpa . or P. geyeri . but 

 Dr. Reed Rollins ultimately determined that they 

 represented a previously undescribed species. The 

 type specimen ( 83300 . GH) was collected in 1983 by 

 Reed C. and Kathryn W. Rollins, with Lackschewitz, 

 Peter Lesica, and Aileen G. Roads, near the summit 

 of St. Mary Peak, also in the Bitterroot Range. 



Lesguerella humilis was collected by Klaus 

 Lackschewitz from East St. Joseph Peak in 1970 

 ( 2126 , MONTU) and from St. Mary Peak in 1974 

 (4560, MONTU, GH) . The species was subsequently 

 recollected on St. Mary Peak in 1974 by 

 Lackschewitz and Schaack ( 4944 , GH) and by 

 Woodland and Arno ( 1077 . MONTU) , and in 1983 by 

 Rollins et al. as noted above. 



In 1990, the Montana Natural Heritage Program, 

 under contract to the U.S. Fish and Wildlife 

 Service (Section 6 Project Agreement No. SE-5-P- 

 1) , conducted status surveys of L. humilis in the 

 Bitterroot Range. Populations were relocated at 

 the three previously known sites and two more 

 subpopulations were located on East St. Joseph 

 Peak. Two other possible sites (Lolo Peak and 

 Sweeney Peak) were searched but no L. humilis 

 plants were found. Gash Point was unsuccessfully 

 searched in 1987 for L. humilis . Thus, the 

 species is known only from three locations in the 

 Bitterroot Range of western Montana. 



E. Comments on current alternative taxonomic 

 treatments: There are no known current 

 alternative taxonomic treatments. 



Present legal or other formal status 



A. International: None. 



