Astragalus hyalimis Jones 



Summer Orophaca 



NATURAL HERITAGE PROGRAM STATUS: G4/S3 



MONTANA STATUS: Limited Distribution 



GLOBAL DISTRIBUTION: South-central Montana and western South Dakota, south 

 to northeast Colorado and western Nebraska 



MONTANA DISTRIBUTION: Southern Carbon and Big Horn counties 



PRYOR MOUNTAINS DESERT DISTRIBUTION: Astragalus hyalinus is abundant 

 below 1675 m (5500 ft) south and west of the Pryor Mountains in the drainages of the 

 Bighorn and Clarks Fork of the Yellowstone rivers. We located 52 populations of A, 

 hyalinus , occurring on barren sandy to clay soils in many plant associations including 

 Utah juniper woodlands, sagebrush steppe and cushion plant-grasslands. Most 

 populations were large. 



MANAGEMENT RECOMMENDATIONS: This species is common throughout much 

 of the study area. Its cushion-plant growth form makes it resistant to livestock grazing. 

 Astragalus hyalinus should not be given special status on BLM's Miles City District. 



Astragalus oregaiuis Nuttall 



Wind River Milkvetch 



NATURAL HERITAGE PROGRAM STATUS: G3-G4/S1 



MONTANA STATUS: Sensitive 



GLOBAL DISTRIBUTION: Western Wyoming and adjacent south-central Montana 



MONTANA DISTRIBUTION: Southern Carbon County 



PRYOR MOUNTAINS DESERT DISTRIBUTION: Astragalus oreganus is locally 

 common, known from only four locations on the south side of the Pryor Mountains. Thi 

 rhizomatous species forms large colonies in sandy soil below 1525 m (5000 ft) and is 

 commonly associated with Artemisia tridentata and Stipa comata . 



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