Lichens of Belgium, Luxembourg and northern France
|Lecanora crenulata Hook.|
On hard calcareous, natural outcrops, rarely on tufa or sandstone rocks or on mortar.
Belgium: Mar.: RR, Brab.: R, Mosan: AR (locally common).
Luxembourg: Lorr.: R.
France: Mar.: RRR, Pic.: RRR, Lorr.: RR.
We use this epithet here for a species with large apothecia and a thick apothecial margin, most common on natural outcrops of hard calcareous rocks, described in Poelt & Leuckert (1995: 313-316) and illustrated in Wirth (1995: 471). A more widespread taxon with smaller apothecia and a thinner apothecial margin, often growing in anthropogenic habitats (walls, gravestones) and described in Fröberg (1997: 31, as L. crenulata), is treated as L. dispersella auct. The nomenclature of both taxa requires further studies.
Lit.: Boul.: 69, Ertz: 19, L9: 16, NL77: 20, NL84: 15, NL97: 49.