between E, lact)pus and E^ mancun) . In the vast majority of cases, 

 populations of £. In gopus did not show evidence of introgression 

 with other species, e\en where two species occurred on the same 

 site. 



II. Iw\ND ON^-NERSHIP 



1. BUREAU OF LAND MANAGEMENT: In southern Cartxin County. 

 Montana the majority of appropriate habitat and diKumenicd 

 populations of Eriogonum lagopus arc on land administered by the 

 Bureau of Land Management. 



2. U. S. NATIONAL PARK SERMCE: Eriogonum l.i tfopus is reported 

 to be frequent in Bighorn Canyon National Recreation Area 

 (Lichvar et al. 1984). These populations have not been mapped. 



3. STATE OF MONTANA: One population of E: l-» tfopu< was hvaied 

 on state land (T9S R27E S.V) NW! 4) during «nir IWI survey 

 (Lesica and Achuff 1992). There are undoubtedly t)ther populaiit>ns 

 on state land in the Prycw Mountain Desert area. 



4. CROW INDIAN RESERVATION: It is likely that there are 

 populations of Ei la gopus on the east side of the Bighorn River ow 

 the Crow Reservation. There may also be populations on the west 

 side of the river north of Bighorn Canyon N.R.A. Biological surveys 

 have not been undertaken on the Crow Reservation iKcause ot 

 tribal policy. 



5. PRIVATE: Populations of Ei ln g(^pus occur on deeded land at the 

 head of Bridger Creek (T7S R24E S 19,20; T6S R24E SIS). Other 

 populations probably occur on the Tillett Ranch (T9S R27E 

 S23,26,35). 



II. ASSESSMENT AND MANAGEMENT RECOMMENDATIONS 



A. THRF-\TS TO KNOWN POPULATIONS: In southern Carbtin County. 

 Montana populations of Eriogonum lagopus may be threatened by ( I ) 

 exotic weed encroachment, (2) mining and oil and gas development, (3) oll- 

 road vehicle use, and (4) livestock grazing. 



1. EXOTIC WEED ENCROACHMENT: Hnlogeton uU^merntus is an 



Asian species that was introduced into arid western North America 

 in 1934. It has since spread throughout much of the arid and semi- 

 arid lands in the western U.S. It is poisonous to livesKKk .ind it 



