Occasional on branches in redwood crown around 70m.
On Salix hookeriana in a hypercoastal dune system. Scant squarrose rhizines. Note the reticulate white cracks.
At full magnification, on the right center of the photo, you can just see the black squarrose rhizines on the lower surface of the lichen.
On an ornamental sugar maple. This is a zone of fairly clean air for downtown. The Parmelia here might not be getting the N that it needs, it looks a bit unhealthy.
Spring Bioblitz 2013