Spotted locoweed (Astragalus lentlginosus, var. wahweapens) also known as freckled or Wahweap Milkvetch is characterized by blue leguminous flowers, purple speckled seed pods, and leaves resembling those of garden pea. The plant is poisonous to cattle, sheep and horses. It grows on gravely clay loam semi-desert benches and swales supporting desert shrubs and sparse stands of juniper.
Bagley, Verl L.; Ralphs, Michael H.; and James, Lynn A., "Spotted Locoweed on the Henry Mountains" (1989). All Archived Publications. Paper 421.