United States, Utah, Box Elder, Great Basin : Promontory Mountains, Golden Spike National Historic Site, slopes on N side of Big Fill trail ca 0.3 miles N of Golden Spike Drive.
41.6362 -112.4857
6918 meters (22691ft)
S-facing slopes of limestone bedrock outcrops and limey-loamy soil. Atremisia tridentata, Arisida purpurea community with Helianthus annuus, Bromus tectorum, Melilotus officinalis, Grindelia squarrosa, Erodium cicutatium,m Bromus japonicus, & Sporobolus c