Syn.: A. astroidea Ach., A. vulgaris (Schaer.) Körb.

Corticolous, on smooth bark, mainly on Carpinus and Corylus, rarely on Fagus, Fraxinus or other trees, generally in shaded forests (incl. coppices).

Belgium: Mar.: R, Fl.: RR, Camp.: RR, Brab.: RR, Mosan: AR, Ard.: AR.

Luxembourg: Ard.: AR-AC, Lorr.: AR-AC.

France: Mar.: RR, Boul.: AR, Pic.: AR, Lorr.: RR.

Lit.: Ba: 8, Boul.: 66, Di: 41-42, Ho: 101, 103, 563, NL84: 11.