Syn.: Physcia ciliaris (L.) DC.

On old roadside trees with a bark rich in dust, often on Fraxinus, decreasing.

Belgium: Fl.: RR, Camp.: R (†1956), Brab.: AR (†<1900), Mosan: R→RRR, Ard.: AR→RR, Lorr.: AR.

Luxembourg: Ard.: RR, Lorr.: AC.

France: Mar.: AR, Boul.: AR, Pic.: AC, Mosan: RR, Lorr.: R.

Lit.: Boul.: 66, Ho: 101, 563, L4: 20, La66: 484, WS: 29-31, 64.