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B. Demography. 



Known populations! There are three known populations of 

 Shoshonea pulvinata in Montana, one in the Beartooth 

 Mountains and two in the Pryor Mountains. There are 

 currently eight known populations in Wyoming. In Montana, 

 population size ranges from 1,500 to 6,000 plants. Detailed 

 demographic information is generally unknown for the Wyoming 

 populations, but in one case (Rattlesnake Mountain Crest 

 (003)) the species was described as "abundant." 



General demographic details (Montana): 



a. Grove Creek Pinnacles. 



1. Area occupied by population: ca. 70 acres in 

 three subpopulations. 



2. Estimated number of individuals: ca. 6,000 

 plants. 



3. Density: Scattered, ca. 1-2 plants/sq. yd. 

 ^. Presence of dispersed seeds: Unknown. 



5. Evidence of reproduction: Small, non- 

 reproductive individuals observed, and presumed to 

 be juveniles. No seedlings observed. 



6. Evidence of population expansion or decline: 

 None, but possibly stable or increasing. 



b. Lost Water Canyon. 



1. Area occupied by population: ca. 25 acres in 

 four subpopulations. 



2. Estimated number of individuals: ca. 3,000 

 plants. 



3. Density: Unknown. 



^. Presence of dispersed seeds: Unknown. 



5. Evidence of reproduction: Small, non- 

 reproductive individuals observed, and presumed to 

 be juveniles. No seedlings observed. 



6. Evidence of population expansion or decline: 

 None, but possibly stable or increasing. 



c. Mystery Cave. 



1. Area occupied by population: ca. 15 acres in 

 three subpopulations. 



2. Estimated number of individuals: ca. 1,500 

 plants. 



3. Density: Unknown. 



^. Presence of dispersed seeds: Unknown. 



5. Evidence of reproduction: Small, non- 

 reproductive individuals observed, and presumed to 

 be juveniles. No seedlings observed. 



6. Evidence of population expansion or decline: 

 None, but possibly stable or increasing. 



