Lichen guy in Corvallis, Oregon, USA; professor at Oregon State University. https://bmccune.weebly.com/
Lichen and moss books: Microlichens of the Pacific Northwest. Common Mosses of Western Oregon and Washington. https://www.wildblueberrymedia.net/

Macrolichens of the Pacific Northwest, 3rd ed. https://osupress.oregonstate.edu/book/macrolichens-of-pacific-northwest-0