Physconia perisidiosa (Erichsen) Moberg
Annotated by D. Glavich, 10 May 2017.

Idaho: Idaho County: Wallowa-Whitman National Forest: Hells Canyon National Recreation Area: Confluence of Snake River and Pittsburg Creek on north side of creek. Elev. 1145 ft.
45.6293° N, 116.472° W; T2N R51E Sec 28SE
Coordinate Source: USFS plot database.
Planted Robinia on upper edge of plot, CERE2 forms shady grove along the riverbank. Site is in a hot, exposed environment on the Pittsburg Ck alluvial fan. Line of trees closest to the R. are nearly devoid of epiphytes. Aside from this, Xanthoria cover was high even on Robinia. Heavy past disturbance, recovering. Site is part of an historical ranch. Area above was farmed. Undifferentiated materials from alluvium, landslides and terrace deposits. Slope 30%. Aspect 55°. Abundance code: 1; labriform soralia; Xanthoria cover very high, very obviously the dominant epiphyte. Also very common Phaob and Phyads, though from eye perspective their dull color blends in with bark. Substrate: Cere2 br. Phenology: soralia.

L. Geiser s.n., Aug 20, 2010
OSC, Barcode: OSC-M-292516