Unidentified Sulphur #1 ?
Colias sp.
The photo above shows the ventral wing surfaces of an unidentified sulphur nectaring on mountain monardella (Monardella odoratissima) as seen on dry, open slopes along Cemetary Ridge several miles north of Buckhorn Lookout in the Hells Canyon National Recreation Area....................July 9, 2007.
Paul Slichter