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

142 P. DIEDERICH & E. SÉRUSIAUX
tribacia (Ach.) Nyl.
On natural, sheltered, siliceous outcrops and on
artificial substrates (mainly old walls), also corticolous
on Fraxinus and Tilia on roadsides.
B Fl.: RRR, Mosan: RR, Ard.: R. L Ard.: R.
Lit.: Ho: 167, 217, 618, La66: 476, NL92: 173, NL97:
53, WS: 50, 99.
vitii Nádv.
Corticolous on roadside bole of Ulmus.
B Mosan: RR (1968). L - .
The species has not been recorded in the study area
for more than thirty years and may be extinct, as
its only habitat (Ulmus trees along roads) has
almost disappeared.
Lit.: La66: 476.
adglutinata (Flörke) Nyl., see Hyperphyscia adglutinata
astroidea auct., non (Clem.) Nyl., see P. clementei
caesiella (B. de Lesd.) Suza, see P. subalbinea
ciliaris (L.) DC., see Anaptychia ciliaris
ciliata (Hoffm.) Du Rietz, see Phaeophyscia ciliata
clementiana (Ach.) Kickx, see P. clementei
cycloselis (Ach.) Vain., see Phaeophyscia orbicularis
detersa auct. belg., non (Nyl.) Poelt, see Physconia
enteroxantha
elaeina auct., non (Wahlenb.) A. L. Sm., see Hyperphyscia
adglutinata
enteroxantha Nyl., see Physconia enteroxantha
farrea auct., non (Ach.) Vain., Physconia perisidiosa
grisea (Lam.) Zahlbr., see Physconia grisea
leptalea (Ach.) DC., see P. semipinnata
leucoleiptes auct., non (Tuck.) Lettau, see Physconia
enteroxantha
luganensis (Mereschk.) Moberg, see Phaeophyscia chloantha
muscigena (Ach.) Nyl., see Physconia muscigena
nigricans (Flörke) Stizenb., see Phaeophyscia nigricans
obscura (Humb.) Fürnr., see Phaeophyscia orbicularis
opuntiella Buschardt & Poelt, see Agonimia opuntiella
orbicularis (Neck.) Poetsch, see Phaeophyscia orbicularis
perisidiosa Erichsen, see Physconia perisidiosa
pulverulenta (Hoffm.) Fürnr., see Physconia distorta
sciastra (Ach.) Du Rietz, see Phaeophyscia sciastra
speciosa (Wulfen) Nyl., see Heterodermia speciosa
teretiuscula (Ach.) Lynge, see P. dubia var. teretiuscula
venusta (Ach.) Nyl., see Physconia venusta
virella (Ach.) Flagey, see Phaeophyscia orbicularis
wainioi Räsänen, see P. subalbinea
PHYSCONIA Poelt
distorta (With.) J. R. Laundon
Syn.: P. pulverulacea Moberg, P. pulverulenta
(Hoffm.) Poelt, Physcia pulverulenta (Hoffm.)
Fürnr.
Corticolous on old isolated trees (mainly Fraxinus,
Populus, Tilia, Ulmus, rarely Juglans, Quercus,
etc.) on roadside, in orchards, pastures or along
streams, in rather nitrophilous conditions.
B Mar.: RR, Fl.: RRR, Camp.: RRR (1920), Brab.:
AR→ RRR, Mosan: AR, Ard.: AR, Lorr.: AC. L
Ard.: AR, Lorr.: AC.
Lit.: Ho: 167, 219, 618, La66: 478-479, WS: 53, 105.
enteroxantha (Nyl.) Poelt
Syn.: Physcia enteroxantha Nyl., P. detersa auct.
belg., non (Nyl.) Poelt, P. leucoleiptes auct., non
(Tuck.) Lettau
Corticolous, on roadside trees and in orchards
(mainly Fraxinus, Tilia and Ulmus), in rather
nitrophilous conditions.
B Mar.: R, Fl.: RRR, Camp.: RRR, Brab.: R,
Mosan: R, Ard.: AR-AC, Lorr.: AR. L Ard.: AR,
Lorr.: AR.
Lit.: Ho: 220, 619, La66: 480-481, WS: 51, 102.
grisea (Lam.) Poelt
Syn.: Physcia grisea (Lam.) Zahlbr.
Corticolous on old roadside trees and in orchards
(mainly Fraxinus, Populus, Tilia and Ulmus,
also on Malus, Pyrus, etc.), rare on concrete or
on old calcareous walls, always in rather nitrophilous
conditions.
B Mar.: C, Fl.: C, Brab.: C, elsewhere: AR-AC. L
Ard.: R, Lorr.: AC.
Lit.: Ca: 164-165, Ho: 220, La66: 479-480, Qu: 122-123,
VGH: 114, WS: 52, 103.
perisidiosa (Erichsen) Moberg
Syn.: Physcia perisidiosa Erichsen, P. farrea auct.,
non (Ach.) Vain.
Corticolous on old roadside trees (mainly Fraxinus,
Populus, Tilia and Ulmus), especially at the base
of the trunk, also saxicolous on old graves or on
limestone rocks.
B Mar.: RRR, Mosan: RR, Ard.: RR, Lorr.: R. L
Ard.: R, Lorr.: AC.
Lit.: La66: 480, WS: 52, 104.