Potentilla hickmanii (called Hickman's potentilla or Hickman's cinquefoil) is an endangered perennial herb of the rose family. This rare plant species is found in a narrowly restricted range in two locations in coastal northern California, in Monterey County, and in very small colonies in San Mateo County. This small wildflower, endemic to western slopes of the outer coastal range along the Pacific Ocean coast, produces bright yellow blossoms through spring and summer. This species was formerly thought to be growing in Sonoma County but that population has been recently reclassified as another species, Potentilla uliginosa and is presumed extinct in that county.