Lichens of Belgium, Luxembourg and northern France

Distribution map of Porocyphus rehmicus (A. Massal.) Zahlbr.  by Paul Diederich   Porocyphus rehmicus (A. Massal.) Zahlbr.
« Porocyphus coccodes

On shaded or exposed, calcareous outcrops; also on a wall close to a river, almost at water level.

Belgium: Mosan: R, Ard.: RR.

Luxembourg: Lorr.: RRR.

France: - .

Two distinct taxa might be involved: P. rehmicus s.s. with large ascospores (16-25 6-12 μm) is known from Luxembourg, and P. byssoides with smaller ones (10-16 6-9 μm) is known from Belgium.

Lit.: NL97: 28-29.

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