Las Pilitas has the most organized plant directory online. If you are interested in planting more native California plants, they are THE BEST resource I have found.
They have two nurseries, the nearest nursery to Hemet is at 8331 Nelson way, Escondido, CA 92026.
Visit them online at http://www.laspilitas.com/help/site-index.html.
Check out their information on fire safety as it pertains to plants at http://www.laspilitas.com/easy/easyfire.htm.
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Here is an interactive map of garden zones to help you choose the right plants: http://www.plantmaps.com/interactive-california-plant-maps-zone-hardiness-map.php.