Arthonia arthonioides (Ach.) A.L. Sm.
Annotated by Daphne Stone, May 2020.

Oregon: Clackamas County: Mt. Hood National Forest: Clackamas River Ranger District: Roaring River Wilderness. Elev. 3563 ft.
45.160167° N, 122.067917° W
Coordinate Source: USFS plot database. Coordinates displaced < 1 mi. for confidentiality.
NE flat depression area with lots of down logs. Signs of burn. Mature T. heterophylla forest and huge lichen abundances. A sarmentosa, P. glauca and Hypogymnia sp.. Huge diversity of ground Cladonia sp., rock and pin lichens. Snags have Hypocenomyce sp.. Slope 20%. Aspect 298°. Abundance code: 4-6. Substrate: TSHE bo.

L. Lasselle s.n., Jun 28, 2005
OSC, Barcode: OSC-M-302561