b.) Missoula and Powell Counties, Montana, U.S. A, 

 (Figure 2, p . 9) . 



B- Precise occ 



urrences . 



1. Populations currently known extant (Table 1, 

 pp. 10-21, listed by county); maps pp. 25-50. 



2. Populations known or assumed extirpated 

 (Table 2, pp. 22-2^): Of the ten previously 

 known occurrences which were not relocated 

 during this study, and thus are presumed to 

 be extirpated, eight of these were roadside 

 sites along major, heavily maintained 

 highways. These sites were all in Missoula 

 County, and include: 



OO't-Sunf lower Mountain 



007-McNamara Bridge 



008-Potomac 



009-Blue SI ide 



Ol^t-Angevine 



1 5-Greenough Roadside 



016-Ho 1 1 and-Pierce Creek 



017-Condon 



These sites apparently consisted of only one 

 or a few individuals, and it is highly 

 likely that they have been destroyed by 

 various road maintenance activities, 

 including grading, road widening, and/or 

 herbicide spraying. 



At the Blanchard Lake site (003), the 

 species was originally described as "scarce" 

 ( P.F. Stickney 23^7 , RM ) . Though the habitat 

 in the area of the collection was found to be 

 a largely undisturbed Festuca scabrel la 

 grassland, no plants could be found. Reasons 

 for apparent extirpation here are unknown, 

 but may have included poor reproductive 

 ability and/or interspecific competition. 

 The Clearwater Access site (Oil) was located 

 in a state-maintained fishing access area 

 along a major highway. Again, the species 

 was originally known to be rare here, with 

 only five plants having been observed in 

 1976. The area is heavily used and 

 maintained, and Gr i nde 1 i a howe 1 1 i i was most 

 likely extirpated as a result of these 

 disturbances and activities. 



3. Historically known populations where current 

 status not known (data from Idaho Natural 



