Lichens of Belgium, Luxembourg and northern France
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Rhizocarpon geminatum Körb. |
On exposed, siliceous rocks, either on natural outcrops or on artificial substrates (roof, wall).
Belgium: Ard.: RR.
Luxembourg: Ard.: RR, Lorr.: RRR.
France: Mosan: RRR.
Lit.: Mü1: 144, NL77: 23, NL92: 162.