Page 11 - lichen_floristics_Italy_VII

The Lichens of Marettimo (Egadi lslands, Sicily)
Pertusaria amara v. pulvinata (Erichsen)
Almb. - With Ùle previous variety, not uncommon
(TSB).
Pertusaria constricta Erichsen - Not
unfrequeru o n smooth bark, especially above 450 m
(GZU, TSB) .
Pertusaria bemispbaerica (Flo rke)
Erichsen - Only found once, on the trunk of Q.
ilexat ca . 450m (TSB) .
Pertusaria beterocbroa (Miili.Arg.)
Erichsen - On branc hes , mostly o f Q. i/ex , at
higber elevatio ns, not uncommon (GZU, TSB).
PertusarùJ bymenea (Ach .) Schaerer - Mostly
on the rough bark of Q. ilex above 450m, not rare
(TSB).
PertusarùJ leucostoma (Bemh.) MassaJ. - On
Q. t/ex, especially on the smooth bark of young
branches, mostly at higher elevations (TSB).
Pertusaria pertusa auc t . - O n Q. ilex ,
restricted to the highest parts of the island, common
(TSB).
Petractis luetkemuelleri (Zalùbr.) Vezda - On
dolomite near the coast, in shaded situations (GZU,
TSB).
Petractis tbelotremella (Bagl.) Vezda - On
limestone and dolomite at ca. 350m (CLU, TSB).
Pbaeopbyscta orbicularis ( Nec ker)
Moberg- Found only o nce, at the base of Pinus, in
a clearly eutrophicated situatlo n (TSB).
Pbarcidia calcariae (Flagey) Vouaux-
Parasitic on Aspicilia calcarea (GZU).
Pblyctis agelaea (Ach.) Flotow - Much rarer
than the following, speàes, and restriaed to Q. ilexin
the most humid woodlands at higher elevations
(TSB) .
Pblyctis argena (Sprengel) Flotow - Restricted
to the trunks and thick branches of Q. ilex, from ca.
300 m to the to p of Mt. Falcone, locally frequent
(GZU, PAL, TSB).
Pbyscia adscendens (Fr.) H. Olivier - Rather
common, especìall y at the base of trun ks of
Ceratonia, in eutrophicated situations (PAL, TSB).
Pbyscia clementei (Turner) Maas Gest. -
GeneraJly rare, but locally very abundant in some
upland ridges exposed to humid wìnds, o n the
branches of shrubs in the macchia (GZU, PAL, TSB).
Pbyscia semipinnata (Gmelin) Moberg -
Commo n on branches of shrubs in the macchia (TSB).
Pbyscia tenella (Scop.) DC. - MostJy epiphytic,
on branches, throughout the island. One sample
was growing with Xanthoria ; the two specimens
originated from the same thallus CTSB, GZU).
Hommage scientifique à G. Clauzade
257
Pbysconia perlsidiosa (Erichsen) Moberg -
Epiphytic, mostly on Q. ilex, restricted to the highest
parts ofthe island (CLU, GZU, TSB).
Placidiops is cinerascens (Nyl.) O . Breuss-
On soil in open grassla nds and garrigue vegetatio n,
not common (CLU, GZU, TSB). Det. O. Breuss.
Placyntbium Hsmorense (Crombie) Vainio -
On calcareous rocks at Ficarella, s terile. Our
materia! which is sterile, corresponds fairly well, but
not complete ly, with that distributed by HENSSEN,
Lich. Cyanoph. 73 (GZU). As we have no idea ofthe
natura! variability of this species, the identification
must be regarded as tentative. New to ltaly.
Placyntbium nigrum (Hudson) Gray - On a
calcareous wa ll, also overgrowing soil, in a shaded
situation, rare (PAL, TSB) .
Placyntbium subradiatum (Nyl.) Arno!d - On
limestone, in a steeply inclined surface with
periodica! p e rcolatio n of water, ce rta inl y not
common (TSB).
Polyblastia rou:xiana Vezda & Vivant- On
soil in the macchia at ca. 350m. This terricolous
species was prevìously known only from lowland
areas of SW France (CLU, GZU, TSB). New to ltaly.
Porina aenea (Wallr.) Zahlbr. - On twigs of Q.
ile.x at ca . 400 m, only locally abundant, otherwise
rare (CLU, TSB) .
Porina borreri (Trevisan) D. Hawksw. & P.
James - On limestone, in a shaded niche, at 400 m
(TSB) .
Porina byssopbila (Korber) Zahlbr . - On
caJcareous rocks (GZU).
Porina linearis ( Leighton) Zahlbr. - Quite
common o n limestone and dolomite, especìally in
shaded, sheltered situations, aJso on underhanging
surfaces (CLU, PAL, TSB).
Porlna olerlana (MassaJ.) Lettau - On limestone
at ca. 450m, in a very shaded situatioo (TSB) .
Protoblastenia incrustans (DC.) Steiner - On
limestone and cement, near the village CTSB).
Protoblastenia rupestris (Scop.) Steiner- On
calcareous rocks at hìgher elevations, rare (GZU).
Pseudopannaria marcii (B. de Lesd .)
Zahlbr. - On soil at Capraro and above 500 at M.
Falcone. This species was hìtherto known only from
southern France . Our materia! is sterile, but complies
well with the description (GZU). New to Italy.
Psora decipiens (Hedwig) Hoffm. - On soil in
open grasslands, espe cially common between 300
and 500m (UU, GZU, PAL, TSB).
Psoroticbia allobrogensis Hue - On
limesto ne near the coast ; identification uncertain for