Specimens collected in 50 x 50 m study plots with center point located by TRIMBLE
985 meters Verbatim Elevation:
Snaking drainage from eroded buttes of Hell Creek Formation origin. Vegetation sparse in sandy drainage with grasslands on ridges of gully. Astragalus bisulcatus is the only selenium hyper accumulator present. Area grazed by cattle.
Purple and yellow flowers. Growing on margins of a large drainage barren of most vegetation. Common plant species include prairie sand reed and A. bisulcatus.