Physcia subalbinea Nyl.

Flora (Regensburg), 57: 306, 1874.
Synonyms: Physcia caesia var. caesiella (B. de Lesd.) Clauzade & Cl. Roux; Physcia caesiella (B. de Lesd.) Suza; Physcia tribacioides var. caesiella B. de Lesd.; Physcia wainioi Räsänen
Distribution: N - TAA, Lomb (Valcuvia & al. 2003, De Vita & Valcuvia 2004), Piem (Morisi & Sereno 1995), VA (Piervittori & Isocrono 1999, Piervittori & al. 2001, Isocrono & al. 2008), Emil (Fariselli & al. 2020), Lig (Watson 2014). C - Tosc (Benesperi 2007, Tretiach & al. 2008), Laz, Sar (Nöske 2000, Rizzi & al. 2011, Giordani & al. 2013). S - Cal (Puntillo 1996), Si (Grillo & al. 1996, Grillo 1998, Grillo & Caniglia 2004, Brackel 2008b).
Description: Thallus foliose, heteromerous, dorsiventral, narrow-lobed, closely adpressed, forming orbicular to irregular, up to 5(-10) cm wide rosettes. Lobes 0.5-1.5(-2.5) mm wide, flat to slightly convex, radiating and well separated. Upper surface whitish to bluish grey, conspicuously white-maculate, with terminal, labriform, blue-grey soralia arising at the tip of short secondary lobes, especially in thallus center; old soralia often becoming convex. Lower surface dark grey, with dark, mostly simple rhizines. Upper and lower cortex paraplectenchymatous; medulla white. Apothecia rare, lecanorine, to 1.5 mm across, with a brown-black, sometimes pruinose disc and an entire to crenulate thalline margin. Epithecium brown; hymenium and hypothecium colourless; paraphyses slender, simple or forked in upper part, the apical cells clavate, with a thin, dark brown 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, 17-25 x 6-11 µm, Physcia-type. Photobiont chlorococcoid. Spot tests: upper cortex and medulla K+ yellow, C-, KC-, P- or P+ faintly yellow. Chemistry: upper cortex with atranorin; medulla with atranorin, zeorin and sometimes unidentified triterpenes.
Note: ecologically similar to P. caesia, but most common in dry-warm alpine valleys.
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)
Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: very rare
Oromediterranean belt: extremely rare
Montane belt: extremely rare
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: absent
Humid mediterranean belt: absent
Dry mediterranean belt: absent

pH of the substrata:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model
Herbarium samples
Index Fungorum GBIF

Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=774&lang=en
France, Corse, Monticello


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_5/Physcia_subalbinea.htm
France, Corse


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_5/Physcia_subalbinea.htm
France, Corse



Pier Luigi Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (5071)


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_5/Physcia_subalbinea.htm
France, Corse


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_5/Physcia_subalbinea.htm
France, Corse


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_5/Physcia_subalbinea.htm
France, Corse


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=774&lang=en
France, Corse, Cap Corse


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=774&lang=en
France, Corse, Cap Corse


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=774&lang=en
France, Corse, Cap Corse


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=774&lang=en
France, Corse, Cap Corse


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=774&lang=en
France, Corse, Cap Corse


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=774&lang=en
France, Corse, Monticello


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P_5/Physcia_subalbinea.htm
France, Corse


Michel David - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=774&lang=en
France, Corse, Corbara


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1448&lang=en
France, Port de Merrien
Atlantic form


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1448&lang=en
France, Port de Merrien
Atlantic form


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1448&lang=en
France, Le Faou
Atlantic form


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1448&lang=en
France, Port de Merrien
Atlantic form


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1448&lang=en
France, Port de Merrien
Atlantic form


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1448&lang=en
France, Port de Merrien
Atlantic form


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1448&lang=en
France, Port de Merrien
Atlantic form


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1448&lang=en
France, Guilvinec
Atlantic form