15 



range. 



SOIL RELATIONSHIPS: Lesguerella klausii is 

 largely restricted to sparsely vegetated gravelly 

 or rocky slopes* often in sites with poor soil 

 development. The type of parent material does not 

 distinguish the sites where it is found; 

 populations are known from limestone* shale* 

 argillite, and quartz-derived substrates. Soil 

 texture* and the lack of dense competing 

 vegetation* appear to be the most important 

 factors in determining the distribution of L. 

 k lausi i . 



The following occurrences are wholly or partially 

 associated with shale barrens and slopes: 



Hunters Gulch (001) 



Pike Creek (003) 



Rogers Pass West (00^) 



Barking Dog (006) 



Nelson (007) 



Refrigerator Canyon (008) 



Blacksmith Gulch (010) 



Sheep Mountain Pass (01^) 



Bull Run Gulch (016) 



Sweats Gulch (017) 



Butler Hill (019) 



Rogers Pass East (022) 



Soup Creek West (025) and East (026) 



Most or all of the following three occurrences 

 have been found on limestone-derived soils: 



Big Log Gulch-Hunters Gulch Ridge (013) 

 Moors Creek (015) 

 Keepout Gulch (018) 



At a number of sites* portions of the populations 

 are found on adjacent roadbanks and similarly 

 disturbed sites. This response reflects the 

 preference of L. k lausi i for open* rocky habitats 

 which are relatively unstable. These sites 

 include: 



Alice Creek (002) 



Pike Creek (003) 



Barking Dog (006) 



Nelson (007) 



Refrigerator Canyon (008) 



Burnt Gulch (009) 



Prices Gulch (012) 



Butler Hill (019) 



Newlan Creek Reservoir (021) 



