United States, California, Lake, Near Potato Hill, close to the town of Stonyford. USGS Quadrangle: Potato Hill
39.352222 -122.794167
39§ 21m 8s N; 122§ 47m 39s W
1125 meters (3690ft)
From a chaparral or brushland in the general vicinity of a slope or hillside on a west exposure as a member of the herb layer ina flowering and fruiting state. The population was located on the upper third of a ridge system that had a 10 percent slope, a convex vertical slope shape and a convex horizontal slope shape. It was growing on soil having a very gravelly texture composed mainly of serpentine rock with a residual origin.
Label says: Dibble and Griggs Rare Plant Study, 1979. CARD # 30757. HERB # 28313.