Upperside of male is bright yellow-orange with a narrow dark border and few pale spots. Hindwing has pale veins and a band of large irregular pale spots.
Caterpillars emerge in the spring and feed on leaves, making shelters of leaves tied with silk.
One brood from May-July. Pacific Slope, Oregon south to Riverside County, California. Scott, J. A. 1986. The butterflies of North America. Stanford, R. E. and P. A. Opler.