They’re everywhere in California — lining the coast and city streets with tall, slender trunks, and shading passersby with long and vibrant green feathered leaves. They make up a picturesque ...

But a one-acre residence on a quiet country lane in Walnut Creek, 25 miles east of the San Francisco, is home to a thriving ...

Along the iconic Sunset Boulevard in Hollywood, palm trees line both sides of the roadway. They tower above the tourists and traffic, synonymous with Los Angeles in the minds of visitors.

Fragrant eucalyptus trees, indigenous to Australia, sway in the breeze along roadways and in groves. Stately palm trees ... and founding director of the California Center for Sustainable Communities.