These are four of my favorite California native plants. They're drought tolerant and will grow well in the increasingly warm and dry Southern California garden. For more info: http://www.bhg.com/gardening/gardening-by-region/southern-california/
Salvia Celestial Blue is REALLY blue. Native plants are wonderfully fragrant and colorful. Celestial Blue has grown into a six ft. bush with no irrigation in both Los Angeles and San Diego. You'll have to water it a few times to start it, but then it's on a roll!
Long blooming, drought tolerant and clay friendly California native Clarkias annuals. they self-sow reliably, so you’ll have new volunteers every year, brand new plants that never look aged or sad. Exceptionally exuberant, “Ruby Chalice Clarkia” quickly reaches 30” x 30”, displaying a profusion of 2” cherry centered lavender-pink blooms beginning in May and lasting till midsummer and even Fall (with some water).