Fruiting on hardwood (live oak).
When I came to work in the morning I found bits of rose hips on the concrete under the rose bush and had wondered what happened. Later in the day I saw a squirrel in the bush eating the rose hips, discarding much of each rose hip onto the ground and moving along to eating others.
Growing on moss
On black oak
Need help with ID, sighted along a trail in Richmond, CA near the San Francisco Bay.
Thallus / medulla K-
Soralia abundant, not concave
Branches not constricted at base
Base of thallus not blackened
Brodo takes me to U. lapponica / U. glabresens couplet, but I probably missed something.