The Lichens and Lichenicolous Fungi of Belgium and Luxembourg ...

THE LICHENS OF BELGIUM AND LUXEMBOURG. AN ANNOTATED CHECKLIST 147
lectissima (Fr.) Zahlbr.
On natural, siliceous rocks, on shaded, vertical surfaces,
usually submitted to periodic flushing or
spraying.
B Mosan: RRR, Ard.: AR. L Ard.: RRR.
Lit.: DG: 15, La69: 98.
leptalea (Durieu & Mont.) A. L. Sm.
Syn.: Segestria leptalea (Durieu & Mont.) R. C. Harris
Corticolous, on Acer, Carpinus, Cornus, Fagus and
Quercus, also on twigs and leaves of Buxus,
most common on smooth bark in shade.
B Mosan: AR, Ard.: R, Lorr.: RR. L Ard.: RR,
Lorr.: R.
Lit.: Di: 198, L3: 33, NL84: 17, NL92: 173, NL97: 54, Tholl
et al. (1999), van den Boom & Sérusiaux (1996: 22).
linearis (Leight.) Zahlbr.
Syn.: Trichothelium lineare (Leight.) R. C. Harris,
Sagedia persicina Körb.
Saxicolous on calcareous and sandstone rocks in
shaded, sheltered habitats.
B Mosan: AR, Ard.: RR. L Lorr.: RR.
Lit.: DG: 15, Ertz: 20, La69: 98, NL84: 17, NL97: 54.
carpinea (Pers.) Zahlbr., see P. aenea
POROCYPHUS Körb.
coccodes (Flot.) Körb.
On siliceous and calcareous, natural outcrops and
walls, usually in ruderal conditions.
B Ard.: RRR. L Lorr.: RR. Most probably overlooked.
Lit.: L8.
rehmicus (A. Massal.) Zahlbr.
On shaded or exposed, calcareous outcrops; also on
a wall close to a river, almost at water level.
Two distinct taxa might be involved: P. rehmicus
s. s. with large ascospores (16-25 × 6-12 µm) and
P. byssoides with smaller ones (10-16 × 6-9 µm).
P. rehmicus s. s.: B - . L Lorr.: RRR.
P. byssoides Hepp: B Mosan: R, Ard.: RRR. L - .
Lit.: NL97: 28-29.
byssoides Hepp, see P. rehmicus
PORPIDIA Körb.
Syn.: Huilia Zahlbr.
The genus is widespread and locally common in the
study area, but little studied. Several collections
may represent additional taxa.
albocaerulescens (Wulfen) Hertel & Knoph
Syn.: Lecidea albocaerulescens auct., non (Wulfen) Ach.
On siliceous rocks in sheltered conditions by a river
(for the only recent specimen).
B Ard.: RR (1963). L - . F Ard.: RRR (