Chorizanthe ventricosa, common name Priest Valley spineflower, is a plant species endemic to a small region in the Coastal Ranges of west-central California. It is found only on serpentine outcrops in grasslands and pine-oak woodlands at elevations of 500-1000 m. It has been reported from 4 counties: Monterey, San Benito, Fresno and San Luis Obispo. Chorizanthe ventricosa is an herb up to 70 cm tall, forming large spreading colonies. Leaves are up to 5 cm long. Flowers are formed in clusters up to 6 cm across, with green bracts with pointed tips giving the impression of spines. Flowers are 2-colored, white or yellow plus red or maroon.