Fritillaria biflora, the chocolate lily or mission bells, is a species of fritillary native to western California, US, and northern Baja California, Mexico.

[2][3] It occurs in the chaparral and woodlands ecoregion, often in serpentine soil formations and hillside grassland habitats.

[4] Fritillaria biflora is a bulbous herbaceous perennial up to 60 cm tall.

[6] Fritillaria biflora should not be confused with Arthropodium strictum, which is also called "chocolate lily".

The Kamchatka fritillary (F. camschatcensis) is sometimes also called "chocolate lily" in Alaska.