Or Gardening in Small Spaces III. Came across this on an old fence post while we were planting the trees this weekend. I thought they were young pyxie cups in bloom, but they might actually be "British Soldiers" (Cladonia cristatella).
With maybe some Cracked Shield Lichen and who knows what else mixed in. Click on the photos to get a larger view, but neither are especially sharp.
I've really used the lichen pages of my North American Wildlife book. May have to move up to a whole book on lichen! Check these out too: Small Spaces I and Small Spaces II.
5 hours ago