That's Wright, Buckwheat!

Photo by Marty Horowitz 10/31/2013

This beauty is in the Buckwheat family (Polygonaceae). (The plant, of course!) Named after the 19th-century American botanist, Charles Wright, this is called Wright's Buckwheat (Eriogonum wrightii). The butterfly beauty is a Checkered White. Sure looks pale blue to me. Maybe I've had too much buckwheat.