Chorizanthe biloba
 Chorizanthe biloba is a species of flowering plant in the buckwheat family known by the common name twolobe spineflower. It is endemic to California where it is known only from the Central Coast Ranges. There are two varieties both of which are uncommon to rare. C. b. var. biloba is known from several areas of the Central Coast Ranges including the foothills of the Santa Lucia Mountains and Diablo Range. It grows erect up to 40 centimeters tall.