Syn.: P. scutata (Dicks.) Duby

On epiphytic mosses, or more rarely siliceous rocks, in well-preserved and humid forests.

Belgium: Mar.: RRR (†1867), Ard.: RR (†1965), Lorr.: R→RRR (only two trees left with it).

Luxembourg: ?Lorr.: RRR (†<1850).

France: - .

Lit.: L4: 18, Diederich (1986a: 121), Goffinet et al. (1995: 190).