United States, California, Shasta, Ahjumawi Lava Springs State Park, 3 miles N. of McArthur, on the western edge of the Modoc Plateau. Plants collected from the bottom portion of the Spatter Cone Trail loop. USGS Quadrangle: Fall River Mills 1:24,000
41.122222 -121.442222 +-402m. NAD83
41§ 7m 20s N; 121§ 26m 32s W
1049 meters
3440ft.
In open juniper woods. Host plant was small shrub of Artemisia tridentata. Corolla: light purple.