Syn.: P. aphthosa (L.) Willd. var. variolosa (A. Massal.) J. W. Thomson, P. aphthosa auct. belg., non (L.) Willd.

Saxicolous, or more rarely terricolous, often over mosses, usually in shaded and humid conditions.

Belgium: Mosan: R→RRR (2011), Ard.: R→RRR (1991), Lorr.: RR (†1965).

Luxembourg: Ard.: RR (1997), Lorr.: R (†1981).

France: - .

Lit.: L14: 106, Diederich (1985a: 24), Ertz & Duvivier (2006: 55), Goffinet et al. (1995: 193-194), Vitikainen (1994: 55).