Rhizocarpon lavatum (Fr.) Hazsl.
Annotated by M. Arnot.

Washington: Whatcom County: Pyramid Lake Trail, North Cascades. Elev. 2500 ft.
48° 42.6' N, 121° 8.676' W; T37N R13E S17 NE
Coordinate Source: Specimen label.
At wooded lake edge. On boulder. Substrate: saxicolous.

M. Arnot L1231, Jun 3, 1998
WTU, Barcode: WTU-L-021680