Saxicolous, on walls contaminated by heavy metals (mainly Cu), often on brick, mainly in artificial, but also in natural habitats, on siliceous rocks enriched with Cu and Fe.

Belgium: Mar.: RRR, Fl.: RRR, Camp.: AR, Mosan: RR, Ard.: RR.

Luxembourg: - .

France: - .

Lit.: L5: 37-38, NL84: 17, NL93: 46, Coppins & van den Boom (1995: 89).