Phaeophyscia sciastra (Ach.) Moberg

Phaeophyscia sciastra (Ach.) Moberg

Symb. Bot. Upsal., 22, 1: 47, 1977. Basionym: Parmelia sciastra Ach. - Meth. Lich. Suppl.: 49, 1803.

Synonyms: Hagenia obscura var. sciastra (Ach.) Bagl. & Carestia; Physcia lithotea auct.; Physcia sciastra (Ach.) Du Rietz

Distribution: N - VG, Frl, Ven (Nimis 1994), TAA (Nascimbene & al. 2022), Lomb, Piem (Piervittori 2003, Isocrono & al. 2004), VA (Piervittori & Isocrono 1999, Matteucci & al. 2008c, 2015c), Emil (Fariselli & al. 2020), Lig. C - Tosc, Marc (Nimis & Tretiach 1999), Umb (Nimis & Tretiach 1999, Ravera & al. 2006), Laz (Nimis & Tretiach 2004), Abr (Nimis & Tretiach 1999, Gheza & al. 2021), Mol (Nimis & Tretiach 1999, Caporale & al. 2008), Sar (Neuwirth 2018). S - Camp (Aprile & al. 2003b), Pugl (Nimis & Tretiach 1999), Bas (Nimis & Tretiach 1999), Cal (Puntillo 1996), Si.

Description: Thallus foliose, heteromerous, dorsiventral, narrow-lobed, closely attached, forming orbicular to irregular, up to 5 cm wide rosettes. Lobes linear and discrete 0.2-0.6(-1) mm broad, flat to irregularly convex, grey to almost black in sun-forms, usually epruinose, sometimes with a whitish epinecral layer in the center, with granular to subcylindrical, darker, pseudocorticate isidia arranged in irregular, short to elongate clusters (sometimes appearing like isidioid soredia). Lower surface black, sometimes paler at lobe ends, with simple, black rhizines. Upper and lower cortex paraplectenchymatous; medulla white. Apothecia rare, lecanorine to 2 mm across, sessile. Epithecium brown; hymenium and hypothecium colourless; paraphyses slender, often forked in upper part, the apical cells clavate, with a thin dark cap. Asci 8-spored, clavate, the K/I+ blue tholus penetrated by a faintly amyloid apical cushion with parallel or diverging flanks, the wall K/I-, surrounded by a K/I+ blue outer layer, Lecanora-type. Ascospores 1-septate, brown, ellipsoid, Physcia-type, (14-)16-20(-23) x 7-12 µm. Pycnidia rare. Conidia ellipsoid, 2.5-4 x 1 µm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C_, KC-, P-, UV-. Chemistry: medulla sometimes with terpenoids (traces).

Note: a holarctic lichen with a wide altitudinal and longitudinal range, found on the top of exposed calciferous boulders, sometimes on siliceous rocks or even on eutrophicated lignum, epilithic mosses, etc., with a wide altitudinal range.

Growth form: Foliose, narrow lobed

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)

Commonnes-rarity: (info)

Alpine belt: rare

Subalpine belt: rather rare

Oromediterranean belt: extremely rare

Montane belt: rather rare

Submediterranean belt: rather common

Padanian area: absent

Humid submediterranean belt: rather rare

Humid mediterranean belt: very rare

Dry mediterranean belt: extremely rare

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

Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php

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

Herbarium: TSB (3207)
2002/07/12

Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php

Felix Schumm - CC BY.SA 4.0

[1900], Schweiz, Kanton Luzern, Gloggenmatt südlich von Flühli, ca. 1000 m. Leg. F. Schumm, 12.09.1971, det. F. Schumm, conf. Ed. Frey 09.1971.

Felix Schumm - CC BY.SA 4.0

[1900], Schweiz, Kanton Luzern, Gloggenmatt südlich von Flühli, ca. 1000 m. Leg. F. Schumm, 12.09.1971, det. F. Schumm, conf. Ed. Frey 09.1971.

Felix Schumm - CC BY.SA 4.0

[1900], Schweiz, Kanton Luzern, Gloggenmatt südlich von Flühli, ca. 1000 m. Leg. F. Schumm, 12.09.1971, det. F. Schumm, conf. Ed. Frey 09.1971.

Felix Schumm – CC BY-SA 4.0

[1900], Schweiz, Kanton Luzern, Gloggenmatt südlich von Flühli, ca. 1000 m, an Silikatfelsen. Leg. F. Schumm, 12.09.1971, det. F. Schumm, conf. Ed. Frey 09.1971

Felix Schumm – CC BY-SA 4.0

[1900], Schweiz, Kanton Luzern, Gloggenmatt südlich von Flühli, ca. 1000 m, an Silikatfelsen. Leg. F. Schumm, 12.09.1971, det. F. Schumm, conf. Ed. Frey 09.1971

Felix Schumm – CC BY-SA 4.0

[1900], Schweiz, Kanton Luzern, Gloggenmatt südlich von Flühli, ca. 1000 m, an Silikatfelsen. Leg. F. Schumm, 12.09.1971, det. F. Schumm, conf. Ed. Frey 09.1971

Felix Schumm – CC BY-SA 4.0

[1900], Schweiz, Kanton Luzern, Gloggenmatt südlich von Flühli, ca. 1000 m, an Silikatfelsen. Leg. F. Schumm, 12.09.1971, det. F. Schumm, conf. Ed. Frey 09.1971

Felix Schumm – CC BY-SA 4.0

[1900], Schweiz, Kanton Luzern, Gloggenmatt südlich von Flühli, ca. 1000 m, an Silikatfelsen. Leg. F. Schumm, 12.09.1971, det. F. Schumm, conf. Ed. Frey 09.1971

Felix Schumm – CC BY-SA 4.0

[1900], Schweiz, Kanton Luzern, Gloggenmatt südlich von Flühli, ca. 1000 m, an Silikatfelsen. Leg. F. Schumm, 12.09.1971, det. F. Schumm, conf. Ed. Frey 09.1971

P.L. Nimis - CC BY-SA 4.0

TSB 42055

Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php

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