[Unidentified Lichens of Central and Eastern Oregon and Washington]

Unidentified Lichen of Central Washington #3

possibly Physcia sp. ?

Can you help verify the identity of this lichen?

Unidentified Lichen of Central Washington #3 - Unidentified Lichen of Central Washington #3

An unidentified lichen (possibly Physcia sp. ?) on large boulders at the eastern base of Steamboat Rock, Steamboat Rock State Park............June 1, 2013. These boulders appear to be granitic, possibly glacial erratics dropped when icebergs became stranded at this location during one of the prehistoric Bretz floods.
Paul Slichter E-mail