Methodus, Sectio prior (Stockholmiæ): 14 (1803).

Basionym: Lichen confluens Weber, Spicil. fl. goetting.: 180 (1778).

Chemistry: Confluentic acid syndrome, stictic acid syndrome (Hertel 1992: 4 in a sample from Sachsen-Anhalt, Germany). Confluentic acid syndrome (Hertel 1992: 5 in a sample from Tirol, Austria).