Verrucaria nigrescens Pers.
Annotated by L. H. Pike.

Oregon: Lane County: 7 km. Southeast of Walton, along the old highway N of the Siuslaw River. Elev. 350 ft.
T18S R8W S16 NW 1/4
Datum: WGS 84. Uncertainty: 1000 meters. Coordinate Source: Geolocate.
on a S-facing sandstone cliff. Substrate: saxicolous.

Scott Sundberg 283, Nov 19, 1976
WTU, Barcode: WTU-L-001310