Caulanthus cooperi is a species of flowering plant in the family Brassicaceae known by the common name Cooper's wild cabbage. It is native to the southwestern United States and Baja California, where it is a common plant in a number of open, sandy habitats. This annual herb produces a slender, somewhat twisted stem with widely lance-shaped to oblong leaves clasping it. The flower has a rounded or urn-shaped coat of pinkish or pale greenish sepals enclosing light yellow or pale purple petals. The fruit is a straight or curving silique several centimeters long. References External links Jepson Manual Treatment of Caulanthus cooperi USDA Plants Profile Caulanthus cooperi — U.C. Photo gallery cooperi Flora of Arizona Flora of Baja California Flora of California Flora of Nevada Flora of Utah Flora of the California desert regions Flora of the Great Basin Flora of the Sonoran Deserts Natural history of the Mojave Desert Natural history of the Peninsular Ranges Natural history of the Santa Monica Mountains Plants described in 1877 Flora without expected TNC conservation status