I first spotted these flowers in March 2012, misidentifying them as Hill Sun Cups, then, due to drought conditions, only saw them briefly again in 2014. At two locations across the creek and east of the house about 1/4 mile, they began blooming in late February of 2015.
According to the Calflora map, this is the northernmost sighting west of the Sierras. Not a rare species, if confines itself to Southern California and east of the Sierras. Always nice to find a wildflower established beyond its normal range.