Washingtonia filfera palms are native to California.
Washingtonia filifera, the shorter relative of the Mexican Washingtonia robusta a/k/a skyduster.
Thanks. I looked it up, says native to Southern California and Baja California. Here in Northern California, I suspect they were all brought in from elsewhere. Here's a picture of one, looks a lot like the one that was in front of my home. I hated all the palm leave fronds that constantly fell on my lawn.