Macrodiplophyllum microdontum (Mitt.) Perss.
Annotated by D.H. Wagner, 5 Aug 2016.

Alaska: Schrader Lake--Peters Lake area, just northwest of Mount Chamberlin, Franklin Mountains, Brooks Range. Elev. 3000 ft.
69° 22' N, 145° 3' W
Coordinate Source: Specimen label.
In deep crevices between boulders, near summit. Duplicate Specimen ex. NY.

William Campbell Steere 18961, Jul 29, 1952
WTU, Barcode: WTU-B-015852