Upperside is orange with black markings.
Caterpillars feed on leaves communally in a web.
Partially-grown caterpillars hibernate at the base of the host plant. One brood from June-July. Moist areas such as marshes, bog edges, pastures, and meadows. Maritime Provinces west to Manitoba, south to West Virginia, southern Ohio, and northeastern Illinois. G4 - Apparently secure globally, though it might be quite rare in parts of its range, especially at the periphery.