Fritillaria agrestis is a species of fritillary known by the common name stinkbells. This wildflower is endemic to California, where it is a rare plant. It grows in heavy soils, particularly clay, in the central part of the state. This lily grows an erect stem reaching about half a meter in height with a clump of 5 to 12 long, narrow leaves clustered around its base. The nodding flower is a cup of six petals, each one to three centimeters long and sometimes curved at the tips. They are white with greenish to pinkish markings on the outer surface and purple-brown on the inner surface. The nectaries inside the flower are long and prominent. The flower has an unpleasant odor.