threats to this site. Lower elevations are heavily-grazed grasslands and 

 shrublands, and cattle influx from these areas threaten the site. 



INFORMATION NEEDS: Sections 10 and 11 should be more thoroughly surveyed to assess Arabis fecunda 

 population patterns. 



MANAGEMENT NEEDS: The priority area within this site is the Arabis fecunda ridge in the northwest 

 quarter of section 11. It would be desirable to expand the Humbug Spires 

 Primitive Area to include this particularly significant portion of the site. A 

 fence to exclude livestock would also be helpful along the eastern and southern 

 boundaries of this occurrence. The western and northern boundaries are already 

 fenced. 



MANAGEMENT COMMENTS: A portion of the site is within the BLM's Humbug Spires Primitive Area. 



ELEMENT OCCURRENCE INFORMATION: 



NAME: 



JUNIPERUS SCOPULORUM/CERCOCARPUS LEDIFOLIUS PA 

 PINUS FLEXILIS/CERCOCARPUS LEDIFOLIUS PA 

 PSEUDOTSUGA MENZIESI I/CERCOCARPUS LEDIFOLIUS PA 

 PSEUDOTSUGA MENZIESI I/CERCOCARPUS LEDIFOLIUS PA 

 PSEUDOTSUGA MENZIESI I/CERCOCARPUS LEDIFOLIUS PA 

 ARTEMISIA TRIDENTATA/AGROPYRON SPICATUM PA 



OWNERSHIP/MANAGEMENT: BLM: BUTTE DISTRICT, HEADWATERS RESOURCE AREA 

 HUMBUG SPIRES PRIMITIVE AREA 

 PRIVATELY OWNED LAND (INDIVIDUAL OR CORPORATE) 



30 



