Fritillaria biflora var. ineziana (Hillsborough chocolate lily) is a species of fritillary endemic to San Mateo County, California. It grows on serpentinite in cismontane woodland and valley and foothill grassland at elevations that range from 295 to 525 feet (90 to 160 meters) It is typically found on serpentine soils and it is defined as a "broad endemic" (5. 4/6. 2 affinity) where 85-94% of occurrences are expected to occur on ultramafic soils. Fritillaria biflora var. ineziana is endemic to California and only known to occur in the Hillsborough area of San Mateo County in the San Francisco Bay Area. The California Natural Diversity Database only has two known locations of this species - one from the Montara Mountain/San Mateo 7. 5 minute USGS quadrangles and the other one from the San Mateo quadrangle.