Peltigera venosa (L.) Hoffm.

Peltigera venosa (L.) Hoffm.

Descr. Adumbr. Pl. Crypt. Lich., 1: 31, 1789. Basionym: Lichen venosus L. - Sp. Pl., 2: 1148, 1753.

Synonyms: Peltidea venosa (L.) Ach.

Distribution: N - Frl (Tretiach & Hafellner 2000, Nardini & al. 2013), Ven (Massalongo Lich. Ital. 17: Vitikainen 1994, Nascimbene 2002, Nascimbene & Caniglia 2003c), TAA (Vitikainen 1994, Nascimbene 2008b, Nascimbene & al. 2022), Lomb (Anzi Lich. Ital. 95 and Lich. Sondr. 61: Vitikainen 1994, Gheza 2017, Gheza & al. 2022), Piem (Vitikainen 1994, Isocrono & al. 2003, 2004, 2007), VA (Vitikainen 1994, Piervittori & Isocrono 1997, 1999, Valcuvia 2000, Watson 2014), Emil (Vitikainen 1994, Fariselli & al. 2020, Ravera & al. 2022b), Lig (Brunialti & al. 2001). C - Tosc (Benesperi & al. 2007), Marc, Umb (Ravera & al. 2006, 2006b), Laz (Herb. Ravera 4890), Abr. S - Cal (Vitikainen 1994, Puntillo 1996, Lich. Ital. Exs. 71: Isocrono & al. 2022).

Description: Thallus foliose, heteromerous and dorsiventral, loosely attached by a single, stout rhizine, up to 2.5 cm in diam. Lobes flattened, smooth, rounded to fan-shaped, up to 25(-30) mm across. Upper surface smooth, somehow shiny, grey to grey green when dry (turning brown in the herbarium), bright green when wet. Lower surface pale, with a very evident network of black, flat, reticulate, villose veins, and granular-warty, dark cephalodia located on the veins. Upper cortex pseudoparenchymatous; medulla white; lower cortex absent. Apothecia frequent, 1-6 per lobe, rounded or oval, flat, up to 5(-6) mm across, dark brown to black, the lower side with a thick, dark, pseudoparenchymatous cortex. Paraphyses simple, distinctly thickened above. Asci 8-spored, fissitunicate, the thickened apex with a K/I+ blue ring, Peltigera-type. Ascospores usually 3-septate, hyaline to pale brown at maturity, acicular, thin-walled, (29-)35-43 x 4-8 µm. Photobiont chlorococcoid (Coccomyxa), cephalodia with Nostoc. Spot tests: cortex and medulla K-, C-, KC-, P-, UV- or very rarely medulla faintly C+ and KC+ pink. Chemistry: medulla with tenuiorin, methyl gyrophorate and triterpenoids, sometimes with traces of gyrophoric acid.

Note: an arctic-alpine to boreal-montane, circumpolar lichen found on soil rich in humus in cold-humid sites near and above treeline; most frequent in the Alps, very rare in the mountains of Central and Southern Italy.

Growth form: Foliose, broad lobed

Substrata: soil, terricolous mosses, and plant debris

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: rare

Subalpine belt: rather rare

Oromediterranean belt: extremely rare

Montane belt: absent

Submediterranean belt: absent

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: absent

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

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

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

Herbarium: TSB (5080)
2001/12/05

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

Herbarium: TSB (34513)
2002/01/17

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

Herbarium: TSB (28550)
2003/03/03
lower surface

Triin Aimla; Owner: University of Tartu

Curtis Randall Björk, - CC BY-SA 4.0

Vancouver Island, British Columbia, Canada
2018

Juri Nascimbene - CC BY-SA 4.0; Owner: ITALIC - Dyades Project - Dept. of Life Sciences, University of Trieste

Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern
2007

Juri Nascimbene - CC BY-SA 4.0; Owner: ITALIC - Dyades Project - Dept. of Life Sciences, University of Trieste

Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern
2007

Juri Nascimbene - CC BY-SA 4.0; Owner: ITALIC - Dyades Project - Dept. of Life Sciences, University of Trieste

Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern
2007

Juri Nascimbene - CC BY-SA 4.0; Owner: ITALIC - Dyades Project - Dept. of Life Sciences, University of Trieste

Italy, Trentino-Alto Adige, Bolzano/Bozen, Sciliar/Schlern
2007

Zahlbruckner A. 1926. Lichenes (Flechten). In: Engler A. (ed.): Die natürlichen Pflanzenfamilien. 2nd ed., vol 8, W. Engelmann, Leipzig, 270 pp.

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P/Peltigera_veno.htm

France, avril 2011 - Olmetto Miluccia - Corse

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P/Peltigera_veno.htm

France, 7/9/2014 - Col du Mont Cenis - Savoie

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_P/Text_P/Peltigera_veno.htm

France, 7/9/2014 - Col du Mont Cenis - Savoie

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1034&lang=en

Italy, Valle d'Aosta

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1034&lang=en

Italy, Valle d'Aosta

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1034&lang=en

Italy, Valle d'Aosta

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1034&lang=en

Italy, Valle d'Aosta

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1034&lang=en

Italy, Valle d'Aosta

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1034&lang=en

Italy, Valle d'Aosta

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1034&lang=en

Italy, Valle d'Aosta

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1034&lang=en

Italy, Valle d'Aosta

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1034&lang=en

Italy, Valle d'Aosta

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1034&lang=en

Italy, Valle d'Aosta

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