An interesting example of hybridization and speciation in San Diego County, California: A. Willow-Herb Clarkia (Clarkia epilobioides), B. Delicate Clarkia (C. delicata), and C. Elegant Clarkia (C. unguiculata). Clarkia delicata (B) is a fertile tetraploid (4n) hybrid between C. epilobioides (A) and C. unguiculata (C)