Literature and Keys

Common Macrolichens of the Pacific Northwest. Interactive Keys, 2019, by B. McCune and S. Yang.
See list of published lichen books and keys for the Pacific Northwest
Rare Lichens of Oregon ($30) and Rare Bryophytes of Oregon ($42) books are still available from the Northwest Oregon District office of the Bureau of Land Management at 1717 Fabry Rd SE Salem, OR 97302. The office is mostly closed during Covid but you can call (503) 375-5646 or email BLM_OR_NO_Mail@blm.gov to obtain a copy.

There are also order forms available from the ISSSSP website at: fs.fed.us/r6/sfpnw/issssp/documents4/inv-li-rare-lichens-book-order-form.pdf and fs.fed.is/r6/sfpnw/issssp/documents4/inv-br-rare-bryophyte-book-order-form.pdf
The Lichenicolous Fungi of the Pacific Northwest
Key to Lichen Genera in the Pacific NW, superseded by McCune (2017) Microlichens of the Pacific Northwest, Vol. 1, Key to the Genera. To obtain a copy, see Wild Blueberry Media. See also Vol. 2, Keys to the Species (same link) for the whole story.
Jim Riley's ID aid for Cladonia in the Pacific NW, 2010
Jim Riley's ID aid for Hypogymnia in the Pacific NW, 2010
Lichens Around Mendenhall Glacier, C. C. Derr and R. H. Armstrong
Recent papers revising macrolichens in the Pacific Northwest