On rocks, soil, roots, bryophytes or on moribund plants in dry and shaded underhangs of siliceous or sandstone rocks, usually very abundant, also at the base of Pinus in woodland, often with M. myriocarpa.

Belgium: Camp.: RRR,Mosan: RRR, Ard.: AR, Lorr.: RRR.

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

France: Ard.: RR.

Lit.: Di: 158-159, L4: 25, NL84: 15, NL92: 171, NL97: 51.