Agropyrou spicatum (bluebunch wheatgrass) 



Allium textile (textile onion) 



Andropogon scoparius (little bluestem) 



Artemisia frigida (fringed sagewort) 



Artemisia tridentata (big sagebrush) 



Astragalus gilvijlorus (tlireeleaved milkvetch) 



Astragalus spathulatus (tufted milkvetch) 



Atriplex confertifolia (shadscale) 



Bouteloua gracilis (blue grama) 



Calamovilfa longifolia (prairie sandgrass) 



Chrysothamnus nauseosus (common rabbit-brush) 



Comandra umbellata (bastard toad-flax) 



Cryptantha celosioides (northern cryptantha) 



Eriogonum pauciflorum (few flowered-buckwheat) 



Festuca idahoensis (Idaho fescue) 



Gutierrezia sarothrae (broom snakeweed) 



Haplopappus acaulis (cushion goldenweed) 



Haplopappus armerioides (thrifty goldenweed) 



Hymenopappus fdifolius (Columbia cut-leaf) 



Juniperus scopulorum (Rocky Mountain juniper) 



Koeleria macrantha (prairie junegrass) 



Linum perenne (blue flax) 



Musineon divaricalum (leafy musineon) 



Opuntia polyacantha (plains pricklypear) 



Oxytropis sericea (white locoweed) 



Phlox hoodii (Hood's phlox) 



Phlox alyssifoUa (alyssum-leaved phlox) 



Pinus ponderosa (ponderosa pine) 



Poa secunda (Sandberg's bluegrass) 



Yucca glauca (soapweed) 



Zigadenus venosus (meadow death-camas) 



TOPOGRAPHY: In southeastern Montana, A. barrii is restricted to heavy 

 clay ("gumbo") knobs, buttes, and barren hilltops, most often of a particular 

 calcareous, soft shale and siltstone complex. The calcareous clay soils in 

 which A. barrii occurs are likely to be low in organic matter, as these locations 

 are sparsely vegetated. These sites range from level areas to steep slopes (0- 

 35%). Most sites occur on intermediate slopes (3-8%). Elevation range is 

 3,140 - 4,160 feet. Many of the populations are located along rivers or 

 streams, where downcutting has exposed shale and siltstone outcrops. 



Astragalus barrii populations are associated with the harsh edaphic and 

 environmental conditions of badlands areas. These areas receive limited 



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