Pertusaria amara (Ach.) Nyl.
Annotated by J. Riley, 5 Jan 2004.

Oregon: Multnomah County: Columbia River Gorge National Scenic Area: Mount Hood National Forest: Columbia River Gorge National Scenic Area. 1 mi E of Warrendale on Trail 400, just E of Elowah Falls; north and west edge of plot border trail. Elev. 294 ft.
45.61471° N, 121.9949° W; T2N R7E Sec PB44
Coordinate Source: USFS plot database.
Mature stand of mixed PSME and ACMA with understory of ACCI. Shallow soils with heavy moss cover and scattered rocks. Low lichen diversity, no cyanolichens, nitrophilous lichens, or sensitive species. Only conspicuous species were Plagla, Hypphy, Melanelia and Parmelia. Sphglo and malformed Evepru present in tiny amounts. Slope 30%. Aspect 290°. Abundance code: 4-4. Substrate: PSME bo.

L. Geiser s.n., Sep 16, 2003
OSC, Barcode: OSC-M-297751