Euphyes vestris, the Dun Skipper, can be found in numerous states in the West, South, Midwest, and the Northeast.
Favorite nectar plants include: Asclepias
USDA Growing Zones for this plant include: 3,4,5,6,7,8,9,10

Host plants:
Carex inops heliophila
Carex lacustris
Carex spissa
Carex
Cyperus esculentus
Cyperus
Tridens flavus

CC 2.0 images courtesy of
Wildreturn
Andrew C
Aaron Carlson
Andrew Cannizzaro
and
Melissa McMasters
Melissa McMasters