I'm a botany professor in the Biology Department at Cal Poly in San Luis Obispo, California. I study California’s native plants and urban trees, with a particular emphasis on eucalypts. I've authored several books (www.pacificstreetpublishing.com), one of which is the best-selling guide to California’s urban forest, A Californian’s Guide to the Trees among Us (Heyday, 2011). www.mattritter.net