United States, California, Butte, Ca. 30 m e of Humboldt Rd, ca. 0.8 km w of Humboldt Peak and 3.5 km ne of Jonesville. T27N R05E S32 USGS Quadrangle: Jonesville 1:64,000
40.150833 -121.436111 +-402m. NAD83
T27N R05E S32; 40§ 9m 3s N; 121§ 26m 10s W
1967 meters (6452ft)
On open se facing slope in Red Fir Forest. With: Erysimum capitatum. Corolla pink.
Voucher specimen for "Studies in the Reproductive Biology of Mustard Species Occuring in Butte County, California"--R.E. Preston; Summer, 1983.