field locoweed

"Oxytropis campestris", the field locoweed, is a plant native to Northern Europe, the mountains of Central & Southern Europe, the Northwestern United States and all of Canada, sometimes grown as an ornamental plant.

It is found in prairies, woods, and meadows, and prefers gravelly and rocky slopes, where it grows most abundantly. The plant has numerous variants. It is a larval host plant of the small blue butterfly.