What is "pieris oleracea"

cabbage butterfly \cab"bage butterfly\ (Zo["o]l.), a white butterfly ( Pieris rap[ae] of both Europe and America, and the allied Pieris oleracea, a native American species) which, in the larval state, devours the leaves of the cabbage and the turnip. See also Cabbage worm, below.

The mustard white (Pieris oleracea) is a butterfly in the Pieridae family. Its historical range is in the Great Lakes area of the United States and southern Canada. The caterpillars feed on brassica-type plants and the adults feed on flower nectar. Some authors consider oleracea to be a subspecies of the green-veined white, Pieris napi, of Eurasia.