I found this pattern on Lyn Browns blogspot. She doesn't know the origin of it and neither do I.
If you can't print this pattern from here go to http://www.lynbrown.com/ and in her search box type Decorative Tree Napkin. It should come up.
I've decided to make this as christmas gifts for my children, that have families of their own, along with a cookbook with old family recipes. I've seen these made up. They are soooo cute. It's a good way to use up the christmas fabric stash I've been hanging on to.