Caulanthus californicus is a species of flowering plant in the family Brassicaceae known by the common names California jewelflower and St. Francis cabbage.

It is endemic to California, where it has been known only from the San Joaquin Valley and the adjacent eastern slopes of the Central Coast Ranges, including the Carrizo Plain and Cuyama Valley. Its range is dramatically decreased from its historical distribution, and the plant is a federally listed endangered species.

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