Syst. Lich. Germ. (Breslau): 146 (1855).

Basionym: Parmelia cinerea var. aquatica Fr., Lich. Eur. Reform. (Lund): 144 (1831).

Type locality: Norway, Troms, Storfjord, by the river Gustavsvingen, 7 August 2003, Owe-Larsson 8938 (USP - neotype). Neotypification by Nordin & Jørgensen (2008: 989).

Type locality coordinates: 69°16'38"N, 20°28'41"E; 69.2773, 20.4782.