Orange Wall Lichen
Xanthoria polycarpa
Synonym: Teloschistes polycarpus
![Orange Wall Lichen: Xanthoria polycarpa (Synonym: Teloschistes polycarpus) on Quercus garryana](polycarpa/polycarpa1a.jpg)
Orange wall lichen as seen on the bark of Oregon white oak (Quercus garryana) along Horseshoe Bend Road about 3.5 miles uphill to the east of the Klickitat River, Klickitat County, Washington.........March 31, 2012.
Paul Slichter