Streptanthus campestris is a species of flowering plant in the mustard family known by the common name southern jewelflower. It is native to southern California and northern Baja California, where it is known from fewer than 20 occurrences scattered between San Bernardino County, California, and Sierra de San Pedro Mártir in northern Baja. It grows in mountain chaparral, woodlands, and forests, at elevations up to 2300 meters (7545 feet). It is a perennial herb producing a...