This showy, annual wildflower is endemic to California, where it is a resident of vernal pools and other wet places in the central part of the state from the Tehachapi Mountains to the San Francisco Bay Area.

The upper lip of the flower is made up of two narrow, pointed lobes which usually stick straight out and are lavender or white.

The lower lip is the same color and made up of three fused lobes, each of which may have a tooth.

In the center of the lower lip is a large white area with two bright yellow spots and smaller dark purple spots near the mouth of the tube.

A large anther sticks out of the mouth of the flower on a stalk of fused stamens.