A sign on a Paradox Walnut tree, developed by Luther Burbank, at Luther Burbank Home and Gardens in Santa Rosa, CA, USA.

- Image ID: W1YKBW
A sign on a Paradox Walnut tree, developed by Luther Burbank, at Luther Burbank Home and Gardens in Santa Rosa, CA, USA.
Gina Kelly / Alamy Stock Photo
Image ID: W1YKBW
Location: Santa Rosa, California, USA