Umbilicaria torrefacta (Lightf.) Schrad.
Annotated by J. Riley, 18 Dec 1997.

Washington: Skamania County: Gifford Pinchot National Forest: Mount St. Helens National Volcanic Monument. Elev. 2877 ft.
45.751281° N, 122.183708° W
Coordinate Source: USFS plot database. Coordinates displaced < 1 mi. for confidentiality.
In a tallus slope with a few clumps of shrubs including Prunus, ACCI, RONU. The few epiphytic lichens found were found mostly on Prunus and a few on ACCI. Rock was rialite. Epiphytic lichens found were very exposed and resembled lichens found in heavily polluted areas. Rock lichens were diverse and abundant. Pilophorus nigracalus was found all throughout the area, very abundant. Slope 70%. Aspect 350°. Abundance code: 4-3. Substrate: Rock.

S. Berryman s.n., Jul 17, 1997
With L. Geiser
OSC, Barcode: OSC-M-254717