Table 3. Numbers of populations and plants of Penstemon 

 lemhiensis in disturbed and native habitats. 



c. 



habitats while three populations containing 67 plants 

 occur in native habitats. Of populations with >50 

 plants, only four populations, containing 271 plants, 

 occur in disturbed habitats while the 13 populations in 

 native habitats contain the vast majority of plants 

 (2352, 78% of the total population). Thus, in terms of 

 the total population of Penstemon lemhiensis . the 

 populations in native habitat are disproportionately 

 important compared to the populations in disturbed 

 habitats. The populations in disturbed habitats are 

 generally small and vulnerable to extirpation due to 

 stochastic population fluctuations, as well as 

 management activities, such as road grading or weed 

 spraying. 



The population size distribution, coupled with a 

 vulnerability to management activities, indicate that 

 Penstemon lemhiensis should remain on the sensitive 

 species list for Region 1 of the U.S. Forest Service. 



PROPOSALS FOR FUTURE STUDIES 



The following studies should be continued: 



1. Demographic monitoring studies of the permanent 



transects should be continued and re-read in 1991. 



