that of sagebrush; however, there is no direct 

 evidence indicating that this is so. 



F. POPULATION BIOLOGY 



1. PHENOLOGY: Castilleja longispica has been 

 observed flowering in mid-June through late July 

 in the Pryor Mountains, July and early August in 

 the Beartooth Mountains, and late June through 

 early July in the Yellowstone area. 



2. POPULATION SIZE AND CONDITION: Among the total of 

 21 known populations there are an estimated 

 50,000-350,000 plants. 



a. PRYOR MOUNTAINS: There are seven known 



populations. Additional populations probably 

 exist in the area. 



i. Bear Canyon population has 1,000-10,000 

 plants over an area of ca. 300 acres. 



ii. East Bear Canyon population has 5,000- 

 10,000 plants in ca. 100 acres. 



iii. Big Coulee population has 1,000-10,000 

 plants in ca. 5-10 acres 



iv. Crooked Creek population has 5,000- 

 10,000 plants in at least three 

 subpopulations in 200-300 acres. 



v. Commissary Ridge population has 10,000- 

 100,000 plants in at least three 

 subpopulations over 3 00-4 00 acres. 



vi. Tony Island population has 100-500 

 plants in ca. 1 acre. 



vii. There are no size or population 



estimates for the Bluewater population. 



