LEJEUNIA - Lichens of Belgium, Luxembourg and northern France

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Bertrange, route entre Gréivelserhaff et Gréivelser-Barrière (M8.24), sur Tilia, 9.2000,
P. Diederich 14397 (h).
Lecanora compallens is a further species that should turn out to be quite
common; as it is always sterile, it is easily overlooked. It was formerly known from
few localities in B Mosan and L Lorr. (DIEDERICH & SÉRUSIAUX, 2000: 109).
Lecanora crenulata Hook.
Selected specimens examined: Belgium, Mar.: au NW de Veurne, vers Sint-Idesbald,
Ten Bogaarde Hoeve, vieux murs autour de la ferme près du parking (C0.57), 5.2002, P.
Diederich 15235 (h); au SW de Veurne, à l’W de Bulskamp, St Gustaafmolen (D0.27),
5.2002, P. Diederich 15251 (h). – Brab.: Zwalm, Roborst, church (E3.23), 8.1999, P.
Diederich 13929 (h) & M. Hoffmann (with L. dispersella). – Mosan: Han-sur-Lesse,
Les Grignaux, W of the Ry d’Ave (J6.34), 5.1997, P. Diederich 12752 (h).
Luxembourg, Lorr.: Lasauvage, dans le village (M7.48), sur un rocher en tuf calcaire,
9.1999, P. Diederich 13882 (h).
France, Picard: Somme, à 6 km au NW d’Abbeville, Port-le-Grand, grande ferme fortifiée
au centre du village (J22.17), 7.2001, P. Diederich 15400 (h). – Lorr.: Meuse, au SE de
Montmédy, Marville, cimetière de St Hilaire (N7.11), 11.2000, P. Diederich 14465 (h).
DIEDERICH & SÉRUSIAUX (2000: 109) explained that the name Lecanora
crenulata is used for two very distinct species. Although we did not examine
the type specimen of L. crenulata, we considered that the name should be used
for the species with the larger apothecia. No name appeared to be available
for the species with smaller apothecia, which we provisionally called ‘L.
crenulata auct.’. In some recent papers (e. g., LLIMONA & HLADUN, 2001;
NAVARRO-ROSINÉS, 1992: 193-195; NIMIS & POELT, 1987), the species with
smaller apothecia is called Lecanora dispersella auct. We propose to follow
this choice until a modern revision of the group is available.
Lecanora dispersella auct., non Steiner
Syn.: Lecanora crenulata auct., non Hook.
Selected specimens examined: Belgium, Brab.: Geraardsbergen, Chappel Oudenberg
(E3.45), on the wall of a church (calcareous stones, mortar, etc.), 8.1999, Diederich
13913 (h) & M. Hoffmann; Zwalm, Roborst, church (E3.23), on the wall of a church
(mortar), 8.1999, P. Diederich 13929 (h) & M. Hoffmann (with L. crenulata).
Luxembourg, Lorr.: NE Kehlen, cimetière de Schéimerech (L8.54), sur un vieux mur,
et sur de vieilles tombes, 9.1997, P. Diederich 12946 (h); Mamer, Tossebierg, près des
thermes romains (M8.14), sur un mur, 11.1997, P. Diederich 13448 (h); Larochette,
près de la ferme Weydert (L8.27), sur Sorbus domestica, 5.1998, Diederich 13623 (h).
France, Mar.: Pas-de-Calais, Ambleteuse, Ancien Fort Mahon, face nord, murs près de
l’entrée du Fort (E22.35), sur un mur, 8.2000, P. Diederich 14394 & J. Signoret (h).