significantly more inflorescences per mature plant than the other 

 two sites (Table 1) . Mortality in 1991-92 was noticeably high at 

 the Mystery Ridge site, while recruitment for the same period was 

 significantly higher at the Grove Creek site (Table 1) . 



Demography of Shoshonea pulvinata was similar at the two 

 Pryor Mountain sites. The only striking difference was the high 

 mortality rate at the Mystery Ridge site where six mature plants 

 died between 1991 and 1992. I do not know the reason for these 

 deaths. The Grove Creek population appears to have very 

 different demography than populations in the Pryor Mountains. 

 Recruitment rate was high, and numbers of individuals declined in 

 the larger size classes. In the Pryors, recruitment rate was 

 low, and there were more mature plants than juveniles. One 

 possibility is that bouts of recruitment are more sporadic in the 

 Pryors. It may also be that mature plants survive longer in the 

 Pryor Mountain populations; however, the high mature mortality at 

 the Mystery Ridge site argues against this explanation. 

 Continued monitoring should help elucidate these questions. 



LITERATURE CITED 



Braughman, J. F. and D. D. Murphy. 1990. Beware of snapshots at 

 the bottleneck - temporal considerations in conservation 

 planning. Endangered Species Update 7(8,9): 6. 



Evert, E. F. and L. Constance. 1982. Shoshonea pulvinata , a new 

 genus and species of Umbelliferae from Wyoming. Systematic 

 Botany 7: 471-475. 



Lesica, P. and J. S. Shelly. 1988. Report on the conservation 

 status of Shoshonea pulvinata . a candidate threatened species. 

 Report to the U.S. Fish and Wildlife Service, Office of 

 Endangered Species, Denver, Colorado. 



Lesica, P. and P. L. Achuff. 1991. Monitoring populations of 

 Shoshonea pulvinata in the Pryor and Beartooth mountains, Carbon 

 County, Montana, 1991 establishment report. Unpublished report 

 to the Bureau of Land Management, Billings, Montana. 



Lesica, P. and J. S. Shelly. 1991. Sensitive, threatened and 

 endangered vascular plants of Montana. Montana Natural Heritage 

 Program Occasional Publication No. 1, Helena. 



Sutter, R. D. 1986. Monitoring rare plant species and natural 

 areas - ensuring the protection of our investment. Natural Areas 

 Journal 6: 3-5. 



USDI-Fish and Wildlife Service. 1990. Endangered and threatened 

 wildlife and plants: Review of plant taxa for listing as 



