on mossy bark
Carlberg (Jan 2016) key
1a) not mushroom
2b) thallus stratified
3b) lower surface different than upper
4b) not attached at a central point
5b) cut edge showing grass-green layer
TO: STRATIFIED FOLIOSE GREEN ALGAL LICHENS (p. 5)
1b) lobes solid
2a) lower surface cottony and veined >> PELTIGERA
white cottony lower surface with dark rhizines
On decaying Quercus agrifolia branch. Heavily colonized with many lichen species at hilltop.
On previous obs. Quercus agrifolia branch
On Baccharis pilularis branch.
On Q. agrifolia bark