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Cladonia squamosa
Light green-blue lichen with brown apothecia growing among some moss
Old oak tree in an oak forest at the Econ River Wilderness Area
I've been reading about lichens in the genus Cladonia lately because I've found some near my house, and this sort of reminds me of the "lipstick" type lichens from that genus, pezizformis or macilenta. Maybe those aren't quite right, but it's a start?