Lupine

Description:

The federally endangered mission blue butterfly requires either Lupinus albifrons, Lupinus formosus and Lupinus variicolor, on which their larvae feed. The butterfly becomes toxic itself when it feeds on the plant, leaving it with a bitter taste to deter predators. Due to its potential danger to livestock, this lupine is removed from rangeland when possible, eliminating a crucial food plant from the butterfly's range

Habitat:

open space

Notes:

I did see a similar butterfly flying around.