On trunks, branches and twigs of deciduous trees in open situations (roadside, orchards, hedges, etc.).

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

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

France: Mar.: RRR, Boul.: RRR, Pic.: RR.

Lit.: Boul.: 72, Ho: 213, La66: 473-474, WS: 49, 97.