Lichens of Belgium, Luxembourg and northern France

Distribution map of Rhizocarpon petraeum (Wulfen) A. Massal.  by Paul Diederich   Rhizocarpon petraeum (Wulfen) A. Massal.
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Rhizocarpon petraeum – Belgium (Mosan), Agimont – © 2005 by Damien Ertz

Syn.: R. concentricum auct., non (Davies) Beltr., R. excentricum (Ach.) Arnold, R. perlutum (Nyl.) Zahlbr.

On rocks containing some quantities of calcium, incl. siliceous and sandstone rocks and hard "clay", in natural or artificial conditions.

Belgium: Mosan: R.

Luxembourg: Ard.: RRR, Lorr.: RRR (<1850).

France: Mosan: RRR.

Lit.: DG: 25, La69: 103.

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