Syn.: R. populina (Hoffm.) Vain.

Corticolous on old roadside trees (mainly on Fraxinus, Populus and Ulmus).

Belgium: Mar.: C, Fl.: AR, Brab.: AR (†?1962), Mosan: AR, Ard.: AC, Lorr.: R.

Luxembourg: Ard.: AR, Lorr.: AR.

France: Mar.: R, Boul.: AR, Pic.: AR, Mosan, Ard., Lorr.: AR.

Lit.: Boul.: 73, Ho: 229, L4: 20, La66: 451, WS: 57, 110, Barkman (1990: 13-14).