On sandstone rocks or on sandy soil, also on wall or in Mesobromion communities, often over mosses.

Belgium: Mosan: RR, Ard.: RRR.

Luxembourg: Ard.: RRR, Lorr.: RR.

France: Brab.: RRR.

Lit.: L6: 143, L8: 44, Ertz & Duvivier (2006: 50).