Peltigera collina (Ach.) Schrad.

J. Bot.: 78, 1803. Basionym: Lichen collinus Ach. - Lichenogr. Suec. Prodr.: 162, 1799.
Synonyms: Peltidea scutata (Dicks.) Ach.; Peltidea scutata var. collina (Ach.) Ach.; Peltigera limbata Delise; Peltigera molesta Delise; Peltigera perfida Gyeln.; Peltigera propagulifera (Flot. ex Körb.) Stein; Peltigera scutata (Dicks.) Duby; Peltigera scutata f. alba Gyeln.; Peltigera scutata f. isidiata-sorediosa Gyeln.; Peltigera scutata var. collina (Ach.) Duby; Peltigera scutata var. propagulifera Flot. ex Körb.; Peltigera scutata var. subscabrosa Gyeln.; Peltigera scutata var. subscutata (Gyeln.) Trass; Peltigera scutata var. typica Gyeln.; Peltigera sibirica Gyeln.; Peltigera subscutata Gyeln.; Peltigera subscutata var. spitsbergensis Gyeln.
Distribution: N - Frl (Vitikainen 1994, Nascimbene & al. 1998), Ven (Caniglia & al. 1999, Nascimbene & al. 2005b, 2006c, 2007, 2009c, 2010b), TAA (Nascimbene & al. 2006e, 2007b, 2022), Lomb (Anzi Lich. Lang. 25: Vitikainen 1994, Gheza & al. 2022), Piem (Isocrono & al. 2003, 2004), VA (Borlandelli & al. 1996, Piervittori & Isocrono 1997, 1999), Emil (Vitikainen 1994, Tretiach & al. 2008, Benesperi 2009, Fariselli & al. 2020), Lig (Vitikainen 1994, Brunialti & al. 1999). C - Tosc (Tretiach & Nimis 1994, Vitikainen 1994, Paoli & Loppi 2001, Benesperi & al. 2007, Brunialti & Frati 2010, Benesperi 2011, Brackel 2015, Frati & Brunialti 2023), Umb (Ravera 1998, Ravera & al. 2006), Laz (Ravera 2001, 2002), Abr (Nimis & Tretiach 1999, Corona & al. 2016, Gheza & al. 2021), Mol (Garofalo & al. 1999, Caporale & al. 2008), Sar (Vitikainen 1994, Zedda 1995, 2002, 2002b, Nöske 2000, Zedda & al. 2001). S - Camp (Aprile & al. 2003b, Nimis & Tretiach 2004, Garofalo & al. 2010, Catalano & al. 2010, 2016), Bas (Potenza 2006, Potenza & Fascetti 2010, 2012), Cal (Vitikainen 1994, Puntillo 1996, Incerti & Nimis 2006), Si (Czeczuga & al. 1999, Nimis & al. 1994, Brackel 2008b, Campisi & al. 2020).
Description: Thallus foliose, broad-lobed, heteromerous and dorsiventral, bluish to brownish grey when dry, blackish when wet, loosely attached, to 10(-15) in diam. (usually less). Lobes 0.5-1 cm wide, up to 3 cm long, radiating or randomly arranged in old specimens, flattened, with rounded ends, glabrous and more or less glossy, rarely somewhat pruinose, the margins raised, undulate, with marginal, linear, pale grey to blue-grey soralia sometimes extending to the upper surface, bearing granular soredia which are partly corticate when young. Lower surface pale, with diffuse, flat, pale brown veins and simple or rarely tufted, up to 3 mm long rhizines. Upper cortex pseudoparenchymatous; medulla white; lower cortex absent. Apothecia very rare, on short ascending lobes. round or saddle-shaped, dark brown to black. Paraphyses simple, distinctly thickened above. Asci 8-spored, fissitunicate, the thickened apex with a K/I+ blue ring, Peltigera-type. Ascospores 3-5-septate, hyaline to pale brown when mature, fusiform, thin-walled, 37-70 x 3-5.5 μm. Pycnidia dark, immersed. Conidia fusiform. Photobiont cyanobacterial (Nostoc the cells in short chains). Spot tests: cortex and medulla/soralia K-, C-, KC-, P-, or medulla/soralia weakly and fleeting KC+ red. Chemistry: four chemotypes, with different combinations of tenuiorin, methyl gyrophorate, zeorin and peltidactylin, plus variable, usually low amounts of gyrophoric acid.
Note: a typical Lobarion-species found on the mossy bark of old deciduous trees in humid, open forests, sometimes on epilithic mosses, with optimum in the montane belt; widespread throughout the country, but rarer in the western Alps and along the Adriatic side of the Peninsula.
Growth form: Foliose, broad lobed
Substrata: bark
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)

Commonnes-rarity: (info)

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

pH of the substrata:

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Solar irradiation:

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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

Simonetta Peruzzi; Owner: Simonetta Peruzzi
Italy, Toscana, Foresta di Vallombrosa
2010



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34863)
2002/02/16



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (13231)
2003/03/03
rhizines



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (13580)
2001/12/05
detail of soredia


Simonetta Peruzzi; Owner: Simonetta Peruzzi
Italy, Toscana, Foresta di Vallombrosa
2010


Simonetta Peruzzi; Owner: Simonetta Peruzzi
Italy, Toscana, Foresta di Vallombrosa
2010



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Udine, Bosco della Stua, Lago di Sauris, 1000m
09.09.2016



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Udine, Bosco della Stua, Lago di Sauris, 1000m
09.09.2016



Felix Schumm – CC BY-SA 4.0
[11922], Österreich, Kärnten, südlich des Frischenkofels beim Plöckenpaß, untere Valentinsalm, ca. 1200 m, an Fagus. Leg. Schumm 15.07.1981, det. Schumm 2010



Felix Schumm – CC BY-SA 4.0
[11922], Österreich, Kärnten, südlich des Frischenkofels beim Plöckenpaß, untere Valentinsalm, ca. 1200 m, an Fagus. Leg. Schumm 15.07.1981, det. Schumm 2010



Felix Schumm – CC BY-SA 4.0
[11922], Österreich, Kärnten, südlich des Frischenkofels beim Plöckenpaß, untere Valentinsalm, ca. 1200 m, an Fagus. Leg. Schumm 15.07.1981, det. Schumm 2010



Felix Schumm – CC BY-SA 4.0
[11922], Österreich, Kärnten, südlich des Frischenkofels beim Plöckenpaß, untere Valentinsalm, ca. 1200 m, an Fagus. Leg. Schumm 15.07.1981, det. Schumm 2010
HPTLC in den Laufmitteln A, B’ und C nach Säurebehandlung bei Tageslicht und 366 nm UV-Langwelle. 1: Start, 4: Position von Norstictinsäure, 7: Position von Atranorin, t: Tenuiorin, z: Zeorin



Juri Nascimbene
Altopiano del Canwsiglio, Regione Veneto, Prov. Treviso, Italy
2005


Helena Rodriguez
Spain, Galicia


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P/Peltigera_collina.htm
4/3/2015 - Cucuruzzu - Corse


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P/Peltigera_collina.htm
4/3/2015 - Cucuruzzu - Corse


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=444&lang=en
France, Col d'Iraty


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=444&lang=en
France, Col d'Iraty


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=444&lang=en
France, Col d'Iraty


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=444&lang=en
France, Col d'Iraty


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=444&lang=en
France, Col d'Iraty


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=444&lang=en
France, Col d'Iraty


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=444&lang=en
France, Le Relecq


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=444&lang=en
France, Le Relecq


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=444&lang=en
Italy, Val d'Aoste


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=444&lang=en
Italy, Val d'Aoste


Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe.


Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe.