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

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THE LICHENS OF BELGIUM AND LUXEMBOURG. AN ANNOTATED CHECKLIST 145<br />

PLATISMATIA W. L. Culb. & C. F. Culb.<br />

glauca (L.) W. L. Culb. & C. F. Culb.<br />

Syn.: Cetraria glauca (L.) Ach.<br />

Corticolous on old isolated trees (e. g. Fraxinus,<br />

Tilia) <strong>and</strong> in forests (on bark <strong>of</strong> almost all species,<br />

incl. exotic conifers), rarely on siliceous<br />

rocks, exceptionally on acidic soil.<br />

B Mar.: RRR, Camp.: R, Brab.: R, Mosan: AC,<br />

Ard.: C, Lorr.: AR. L Ard.: AC, Lorr.: AR.<br />

Lit.: Ho: 167, 223, 621, La66: 419-424, Qu: 122, 124-<br />

125, WS: 53-54, 106, Lambinon (1968b: 405),<br />

Schumacker (1965).<br />

PLECTOCARPON Fée<br />

*lichenum (Sommerf.) D. Hawksw., syn. Celidium stictarum<br />

Tul. Reported from L by Ko: 291, but no corresponding<br />

specimen has been seen.<br />

PLEOPSIDIUM Körb.<br />

chlorophanum (Wahlenb.) A. Massal.<br />

Syn.: Acarospora chlorophana (Wahlenb.) A. Massal.<br />

On natural, siliceous outcrops in dry, exposed<br />

underhangs.<br />

B Ard.: RR. L - . F Ard.: RRR.<br />

Lit.: L4: 20, Sé: 140.<br />

PLEOSPORA Ces. & De Not.<br />

*rufescentis Vouaux, see Dacampia rufescentis<br />

PLEUROSTICTA Petr.<br />

acetabulum (Neck.) Elix & Lumbsch<br />

Syn.: Parmelia acetabulum (Neck.) Duby<br />

Mainly on old roadside trees (e. g. on Fraxinus, Tilia<br />

<strong>and</strong> Ulmus) or in orchards <strong>and</strong> extensive pasture,<br />

also saxicolous on old gravestones or walls.<br />

B Mar.: C, Fl.: C, Camp.: AR, Brab.: AR, Mosan,<br />

Ard. (except Haute Ard.: R) <strong>and</strong> Lorr.: AC. L<br />

Ard.: AC, Lorr.: C.<br />

Lit.: Ca: 134-135, Ho: 171, La66: 432, Qu: 100-101, WS:<br />

36-37, 74, Lambinon (1968b: 405).<br />

POETSCHIA Körb.<br />

+buellioides Körb. This non-lichenized fungus was reported<br />

from L Lorr. by Ko: 254 as a lichen; no relevant specimen<br />

has been seen.<br />

*talcophila (Flot.) Stein, see Karschia talcophila<br />

POLYBLASTIA A. Massal.<br />

<strong>The</strong> genus is poorly collected in the study area <strong>and</strong><br />

requires further studies.<br />

albida Arnold<br />

On shaded, vertical, natural s<strong>and</strong>stone or tufa rocks,<br />

in or at the edge <strong>of</strong> forests.<br />

B - . L Lorr.: RR. Most probably overlooked.<br />

Lit.: L8.<br />

cupularis A. Massal.<br />

Syn.: P. intercedens (Nyl.) Lönnr.<br />

On natural, calcareous rocks, in rather humid <strong>and</strong><br />

sheltered conditions.<br />

B Mosan: RR. L - .<br />

Lit.: BDL2: 44, NL87: 22.<br />

deminuta Arnold<br />

On natural, exposed, calcareous rocks.<br />

B Mosan: RR. L - .<br />

Lit.: NL84: 17.<br />

dermatodes A. Massal.<br />

On natural, exposed, calcareous rocks.<br />

B Mosan: RR. L - .<br />

Lit.: NL87: 22, NL97: 54.<br />

philaea Zschacke<br />

Terricolous, in Mesobromion <strong>and</strong> Xerobromion<br />

communities.<br />

B Mosan: RRR. L Lorr.: RRR.<br />

Lit.: L6: 145, L8.<br />

allobata (Stizenb.) Zschacke, see Agonimia allobata<br />

+fallaciosa Arnold, see Julella fallaciosa<br />

intercedens (Nyl.) Lönnr., see P. cupularis<br />

pertusula (Nyl.) Zschacke, syn. <strong>The</strong>lidium pertusulum (Nyl.)<br />

B. de Lesd. Reported from B Mosan by BDL2: 43-44 <strong>and</strong><br />

Zschacke (1933: 434), but no material seen. A name <strong>of</strong><br />

uncertain application, tentatively included in P. sepulta<br />

by Clauzade & Roux (1985: 622).<br />

sepulta A. Massal. Reported from B Mosan by BDL2: 44,<br />

but no material seen. See also P. pertusula.<br />

vouauxii B. de Lesd., see Agonimia vouauxii<br />

POLYCHIDIUM (Ach.) Gray<br />

muscicola (Sw.) Gray<br />

Syn.: Leptogium muscicolum (Sw.) Fr.

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