Which subspecies of the Melissa blue butterfly depends on the wild blue lupine flower for survival?
Melissa blue:  The Karner blue ("Plebejus melissa samuelis") is a subspecies of the Melissa blue, and was described by the novelist/lepidopterist Vladimir Nabokov. Karner blue:  The butterfly, whose life cycle depends on the wild blue lupine flower ("Lupinus perennis"), was classified as an endangered species in 1992.
Karner blue