United States, California, Yolo, Yolo County: Audubon Bobcat Ranch. North side of Hwy 128, west of Winters. Southeast corner of ranch, west and uphill of ranch house headquarters.
38.529444 -122.041944 NAD83
38° 31m 46s N; 122° 2m 31s W
137 meters
450ft
Blue oak woodland, north-facing slope.
Abundant herb, flowers purplish-pink, sap milky, covered with aphids, caterpillars, and lady bugs.