I finally published all the tree bark patterns in an ebook as well as individually. You can see them all under the identitatum•arborum patterns tab at the top of the page. You can purchase them from Ravelry here. And as I have said before, I am hoping to have a real-world booklet soon with the patterns, too.
It has been an amazing project but I am so ready to move on to thinking about the Great Basin National Park artist-in-residency this fall!