V. NEW INFORMATION 



21. Record of revisions: 21 September 1990; Diane S. 



Pavek; Topics: I.I.D.; I.5.B.I.; I.5.B.2.; I.7.A.; 

 I.7.B.I.; I.7.B.2.; I.7.D.6.; I.lO.A.l.; I.10.A.2.; 

 I. 10. A. 3.; 11.12.; II. 13. A.; II.13.B.1.; II.15.B.1.; 

 III.17.C.1.; III. 17. C. 2.; III. 18. 

 Note: Within the text, numbers in parentheses 

 following site names refer to the three-digit element 

 occurrence (EG) numbers. 



I.l.D. History and knowledge of taxon: Initial survey work 



for Grindelia howellii in Montana was completed by the 

 Montana Natural Heritage in 1986. The initial report 

 issued to the U.S. Fish and Wildlife Service contained 

 location information on 55 populations, including maps 

 and population data. Four new populations were located 

 from 1987 to 1989: Smith Creek (056) and Elk Creek 

 (057) occur in the Swan River drainage, and Black 

 Canyon Road Junction (058) and Lost Prairie Creek (059) 

 occur in the Blackfoot and Clearwater River drainages, 

 respectively. During the 1990 survey, one new 

 population Glacier Creek Road (060) was located in the 

 Clearwater River drainage. Also, one population 

 (Blackfoot Roadside (035)) was apparently extirpated. 

 Thus information is available on 60 populations of G. 

 howellii in Montana, one of which may be permanently 

 extirpated. 



In Montana, G. howellii populations establish in early 

 successional habitats such as roadbeds and disturbed 

 fields, or in other areas where extirpation is likely. 

 Thus, a follow-up study was done in 1990 to relocate 

 and collect population data at 27 sites in Missoula and 

 Powell counties, Montana. Full occurrence records for 

 the populations located since the 1986 report are in 

 Appendix A, New Populations: Element Occurrence 

 Records and Maps, pp. 16-26. Updated information and 

 exact locations for the 27 resurveyed populations are 

 in Appendix B, Resurveyed Populations: Element 

 Occurrence Records and Maps, pp. 27-66. 



I.5.B.I. Populations currently known extant: There are 

 currently a total of 60 known populations of G. 

 howellii in Montana. Information and exact locations 

 for the five populations discovered in Montana since 

 1986 are in Appendix A, New Populations: Element 

 Occurrence Records and Maps, pp. 16-26. Information 

 and exact locations for the 27 resurveyed 



