harsh alpine conditions and is a study in species 

 adaptation. Other limestone substrate endemics in 

 Montana are species of lower elevations. These 

 species and their communities are subject for 

 extended phytogeographic study as initiated by 

 Bamberg and Major (1968) . It has no known 

 horticultural or economic uses at this time. 



5. Geographical distribution. 



A. Geographical range: Eriqeron lackschewitzii is 

 currently known from a total of 12 sites in four 

 counties of Montana (Teton, Flathead, Pondera and 

 Lewis and Clark) . Sites lie within ca. 45 miles 

 north-south along the Front Range. Most sites have 

 been documented east of the Continental Divide, but 

 at least one site is located west of the Divide in 

 the Bob Marshall Wilderness. The range is depicted 

 in Appendix D. 



Potential habitat was identified in this study using 

 the map of surface geology having the greatest 

 detail (Mudge and Earhart 1977) , focusing upon the 

 Madison Group and Devonian formations containing 

 dolomite. These formations are the prevalent 

 surface geology from the easternmost edge of the 

 Front Range westward to within a few miles of the 

 Sun River (ca. 10 miles east-west; the majority 

 outside of Bob Marshall Wilderness boundaries) . 

 Their presence further west is limited, and part is 

 at lower elevation which are forested. 



B. Precise occurrences. 



1. Populations currently known to be extant. 



Occurrence numbcn 001 



Survey site: MOUNT WRIGHT 



County: Teton 



Latitude: ATSSSSN Longitude: 112A959W Elevation: 7500 

 USGS quadrangle: MOUNT WR2IGHT 



Township/range: Section: Additional/quarter sections: 

 026N010W 25 S2; 26 SEA 



Initial discovery: 1982 



Most recent observation: 1992-07-17 



Directions: EAST FLANK OF MOUNT WRIGHT, EAST FRONT RANGE; NORTH OF TRAIL 

 IN SADDLE. 



Occurrence nuitier: 002 



Survey site: HEADQUARTERS CREEK PASS/ROCKY MOUNTAIN 



County: Teton 



Latitude: 47A915N Longitude: 1124822W Elevation: 7760 



USGS quadrangle: OUR LAKE 



