Clarkia speciosa subsp. immaculata
Pismo clarkia subspecies (or variety) is an annual herb native to California and is considered a rare plant.
California Rare Plant Rank: 1B.1 (seriously endangered in California)
State Listing Status: Rare
Blooming Period: May - July
Sources: Althouse & Meade, Inc., California Native Plant Society, and California Natural Diversity Database.