• 



MANAGEMENT RECOMMENDATIONS: Tliis species is widespread and fairly 

 common in the study area. It is probably not sensitive to livestock grazing. Artemisia 

 spinescens should not be given special status on the BLM's Miles City District. 



Astragalus chamaeleiice Gray 



Cicada Milkvetch, Ground Milkvetch 



NATURAL HERITAGE PROGRAM STATUS: G5/S3 



MONTANA STATUS: Threatened 



GLOBAL DISTRIBUTION: South-central Montana, south to Utah, Wyoming and 

 Colorado 



MONTANA DISTRIBUTION: Southern Carbon County 



PRYOR MOUNTAINS DESERT DISTRIBUTION: Astragalus chamaeleuce is 

 widespread below 1555 m (5100 ft) south of the Pryor Mountains; however, populations 

 are generally small and sparse (usually fewer than 100 plants). The species occurs in 

 sandy, silty or sandy clay soils principally in plant associations dominated by Artemisia 

 tridentata . although a few populations occur in Utah juniper open woodland. 



MANAGEMENT RECOMMENDATIONS: Although A, chamaeleuce is uncommon in 

 the Pryor Mountain Desert due to the low density of plants, there is no evidence that it is 

 sensitive to grazing, and it is widespread enough that other management activities could 

 impact only a small proportion of the total population in the study area. It should not be 

 given special status on BLM's Miles City District. 



Astrngaliis geycri Gray 



Geyer's Milkvetch 



NATURAL HERITAGE PROGRAM STATUS: G5/S2 



MONTANA STATUS: Sensitive 



GLOBAL DISTRIBUTION: Southeast Oregon to California, east through southern 

 Idaho to Montana, Wyoming, Utah and Colorado. 



MONTANA DISTRIBUTION: Daw.son, Garfield and Carbon counties 



10 



