United States, California, Yuba, On the huge gravel bar along the Yuba River, about 150 yards west of the south end of Parks Bar Bridge (Highway 20), about 15 miles (by air) northeast of Marysville. T16N R06E S30 NE1/4
39.218333 -121.336667
T16N R06E S30 NE1/4; 39§ 13m 6s N; 121§ 20m 12s W
66 meters
217ft.
Riparian Woodland. Normal size plants, on gravelly soil. Uncommon. Flowers yellow.