Chorizanthe breweri
 Chorizanthe breweri is a rare species of flowering plant in the buckwheat family known by the common names San Luis Obispo spineflower and Brewer's spineflower. It is endemic to California where it is known from about twenty occurrences in the Central Coast Ranges of San Luis Obispo and far southern Monterey Counties. It grows in the chaparral and woodlands of the range generally on serpentine soils.