Scattered plants in this otherwise white-flowered population are this clear yellow, as this plant. Dense field of these growing in sunnier openings under Blue Oaks (Quercus douglasii). This flower was in bud, just opening in the mid-afternoon
Photo of seeds from my accession #20130417a, after air drying at room temperature, threshing, winnowing, and cleaning. This is a larger seeded form than I have found in the vicinity of Auburn, Placer county, to the north.