United States, California, Napa County, Napa County: Wragg Canyon, ca. 2.5 miles east of Wragg Canyon Road on Highway 128.
259 meters
850ft
Chaparral area associated with Rhus and scrub oaks, steep north slope, soil dry gravelly loam on Franciscan sandstone; fern up to 15 cm tall. | Access Database Number (Deprecated): UCD137749