Syn.: Physcia perisidiosa Erichsen, P. farrea auct., non (Ach.) Vain.

Corticolous on old roadside trees (mainly Fraxinus, Populus, Tilia and Ulmus), especially at the base of the trunk, also saxicolous on old graves or on limestone rocks.

Belgium: Mar.: RRR, Mosan: RR, Ard.: RR, Lorr.: R.

Luxembourg: Ard.: R, Lorr.: AC.

France: Mar.: RRR, Lorr.: RR.

Lit.: La66: 480, WS: 52, 104.