Caulanthus amplexicaulis is a species of flowering plant in the family Brassicaceae known by the common name claspingleaf wild cabbage. It is endemic to California, where it grows on open slopes in the Transverse Ranges and Outer South California Coast Ranges. Description Caulanthus amplexicaulis is an annual herb that produces a slender erect stem with flat, oval leaves clasping it toward the base. The bulbous purple flower forms a rounded pouch which opens at the top, with the narrow petal tips reflexed back. The outer petal tips are deep purple; the inner tips are much lighter and can be nearly white. The fruit is a very long silique which may exceed 10 centimeters in length. Varieties There are two varieties of this species. Caulanthus amplexicaulis var. barbarae — Santa Barbara jewelflower; endemic to the serpentine soils of the San Rafael Mountains in central Santa Barbara County. The sepals forming the rounded pouch of the flower are white to cream in color, as opposed to the bright purple of the more common variety. Caulanthus amplexicaulis var. amplexicaulis — endemic to the Transverse Ranges. See also California chaparral and woodlands — ecoregion. Flora of the California chaparral and woodlands References External links Jepson Manual Treatment of Caulanthus amplexicaulis USDA Plants Profile: Caulanthus amplexicaulis (jewelflower) Caulanthus amplexicaulis — U.C. Photo gallery amplexicaulis Endemic flora of California Natural history of the California chaparral and woodlands Natural history of the California Coast Ranges Natural history of the Santa Monica Mountains Natural history of the Transverse Ranges ~ ~ Flora without expected TNC conservation status