United States, California, Butte, In a field, Peter Ahart Ranch, about 2 1/2 miles north and 3/4 mile east of Honcut.
39.364167 -121.520556 +-402m. NAD83
39§ 21m 51s N; 121§ 31m 14s W
40 meters (131ft)
Valley Grassland. Found growing on damp red gravelly poor soil in a farmed field. Annual, stems 3-10 dm. tall. Normal size plants. The plant is scattered and not common in the area. The flowers are yellow.