ITALIC 8.0

Physconia petraea (Poelt) Vězda & Poelt

in Vezda, Sched. ad Lich. Sel. Exs., 36: 7 (nr. 899), 1970. Basionym: Physconia muscigena var. petraea Poelt - Nova Hedwigia, 12: 123, 1966.

Synonyms:

Distribution: N - TAA, Lomb (Valcuvia & al. 2003), Piem (TSB 32672), VA (Piervittori & Isocrono 1999), Emil (Valcuvia & Delucchi 2001, Fariselli & al. 2020), Lig (Steiner, Lich. Alpium 269: Otte & al. 2002). C - Tosc (Benesperi & Lastrucci 2007, Lastrucci & al. 2009), Sar (Nöske 2000, Rizzi & al. 2011, Neuwirth 2018). S - Cal (Puntillo 1996), Si (Nimis & al. 1996b).

Description: Thallus foliose, heteromerous, dorsiventral, loosely attached, forming rather regular, up to 4 cm wide patches. Lobes 1-2(-3) mm broad, markedly rigid, elongate, flattened, divided into flat, adpressed or weakly ascending smaller lobules. Upper surface grey to grey-brown, but often densely white-pruinose, Lower surface whitish at margin, black in central parts, with black, weakly squarrose, long, thread-like rhizines. Upper cortex paraplectenchymatous; medulla white; lower cortex irregularly prosoplectenchymatous. Apothecia very rare, lecanorine, to 5 mm across, with a dark but often white-pruinose disc and an often lobulate thalline margin. Ascospores and pycnidia not observed. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: without lichen substances,

Note: on base-rich siliceous rocks and epilithic mosses in dry-warm situations; known only from southern Europe, and in need of further study.

Growth form: Foliose, narrow lobed

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: absent

Subalpine belt: extremely rare

Oromediterranean belt: absent

Montane belt: extremely rare

Submediterranean belt: extremely rare

Padanian area: absent

Humid submediterranean belt: extremely rare

Humid mediterranean belt: extremely rare

Dry mediterranean belt: absent

pH of the substrata:

1

2

3

4

5

(info)

Solar irradiation:

1

2

3

4

5

(info)

Aridity:

1

2

3

4

5

(info)

Eutrophication:

1

2

3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

1

2

3

4

5

6

(info)

Predictive model

Herbarium samples

Index Fungorum GBIF

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (9641)
2002/05/22

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (9641)
2002/05/22