New Information 



21. Record of revisions: 29 January 1990; Lisa Ann 



Schassberger; Topics: I.I.D.; I.2.B.b.; I.5.A.; 

 I. 5. B. I.e.; I. 6. A.; I.6.B.l.b.; I. 6, B. I.e.; 

 I.6.B.4.; I.6.C.I.; I.6.C.3.; I.6.C.4.; I,6.C.7.; 

 1. 7. A.; I.7.B.I.; I.7.B.2.in.; I.7.D.4.a.; 

 I.8.C.2.b.; I. 9. A.; I.9.B.; I.ll.A.l.; 11.12.; 

 II. 13. A.; II.13.B.; II. 15. A. 1.; II. 15. A. 2.; 

 II.15.B.; 11.16; III.17.C.1.; III. 17. D.; III. 18, 

 Note: Within the text, numbers in parentheses 

 following site names are the three-digit occurrence 

 numbers of sites tracked by the Montana Natural 

 Heritage Program. 



I.l.D. History of knowledge of taxon: One 



additional population of Arabis fecunda was 

 discovered at Cattle Gulch (013) in the 

 Pioneer Mountains, Beaverhead County, 

 Montana, during survey work in 1989. This 

 brings the total number of known populations 

 of A. fecunda to 13. 



I.2.B. National. 



b. Other current formal status 

 recommendations: Arabis fecunda is currently 

 included on the Watch list in Region 1 

 (Northern Region) of the U.S. Forest Service. 

 Watch plants include those species, 

 subspecies or varieties that are not 

 currently known to occur on National Forest 

 land, but which are suspected to occur on 

 such lands owing to the presence of suitable 

 habitat. Also, these are plants for which 

 there is concern for population viability 

 within a given state. If found on National 

 Forest lands, these taxa would be designated 

 as sensitive (U.S. Department of Agriculture 

 1988) . Since the establishment of list, A. 

 fecunda was confirmed from five locations on 

 the Beaverhead National Forest. Thus, the 

 status should be changed to sensitive on the 

 U.S. Forest Service list. 



I. 5. A. Geographical range: The newly discovered 



population of A. fecunda at Cattle Gulch 

 (013) is just southwest of Divide in the 

 Pioneer Mountains, Beaverhead County, 

 Montana. This population is approximately 

 2.5 miles east of the population at Canyon 



