Leptogium hildenbrandii (Garov.) Nyl.

Act. Soc. Linn. Bordeaux, 21: 272, 1856. Basionym: Collema hildenbrandii Garov. - Lich. Prov. Comen., 1: 3, 1837.
Synonyms: Leptogium saturninum var. complicatum Anzi
Distribution: N - Frl, Ven (Caniglia & al. 1999), TAA (Nascimbene & al. 2007b), Lomb (Rivellini 1994, Tretiach 1996, Arosio & al. 2003, Dalle Vedove & al. 2004, Abramini & al. 2008, Ravera & al. 2021c), Piem (Isocrono & al. 2004), VA (Piervittori & Isocrono 1999), Emil (Fariselli & al. 2020). C - Marc, Umb (Genovesi & al. 2002, Ravera & al. 2006, 2006b), Abr (Olivieri & Pacioni 1996, Olivieri & al. 1997, 1997b, Loppi & al. 1999, Brackel 2015, Gheza & al. 2021). S - Bas, Cal (Puntillo 1996).
Description: Thallus foliose, broad-lobed, homoiomerous, gelatinous when wet, firm and markedly rigid when dry, rather loosely adnate, forming large, more or less regular, 5-10(-13) cm wide rosettes. Lobes 5-10 mm wide, contiguous or more or less imbricate, with rounded, ear-like apices, 70-150 µm thick, firm and rigid when dry. Upper surface brown-black or dark lead-grey, greenish brown when moist, minutely and irregularly but conspicuously wrinkled and striate. Lower surface white-tomentose with long-celled, up to 1-1.5 mm long hairs and tufts of pale rhizines. Upper and lower cortex formed by a single layer of cells, inner part of thallus with loosely interwoven chains of Nostoc and hyphae. Apothecia usually abundant, especially in the central parts, lecanorine, laminal, at first immersed in the thallus, then sessile, 2-4(-6) mm across, with a brown-red, shiny disc and a grey-brown, rather thin, usually rugose thalline margin. Proper exciple euparaplectenchymatous; epithecium pale brown; hymenium colourless, K/I+ blue; paraphyses simple, 1-2.5 µm thick at mid-level, the apical cells slightly swollen; hypothecium colourless. Asci 8-spored, cylindrical-clavate, the apex strongly thickened, the apical dome K/I+ pale blue, with a downwardly projecting K/I+ deep blue tubular structure. Ascospores muriform, hyaline, ellipsoid, 16-24(-26) x 8-10 µm. Pycnidia immersed, marginal to submarginal, 0.1-0.3 mm across. Conidia bacilliform, with swollen apices, 4.3-5.5 x 1.3-1.6 µm. Photobiont cyanobacterial (Nostoc, the cells in long chains). Spot tests: all negative. Chemistry: without lichen substances.
Note: on isolated tress with base-rich bark, especially Juglans, Fraxinus and Populus in humid valleys with a rather continental climate. It is included in the Italian red list of epiphytic lichens as “Near-threatened” (Nascimbene & al. 2013c).
Growth form: Foliose, broad lobed
Substrata: bark
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

Commonnes-rarity: (info)

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


P.L. Nimis CC BY-SA 4.0
TSB 2492



E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (16637)
2008.03.10
lower surface



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Udine, Ampezzo Carnico, 600 m
09.09.2016



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Udine, Ampezzo Carnico, 600 m
09.09.2016



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Udine, Ampezzo Carnico, 600 m
09.09.2016


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


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



P.L. Nimis CC BY-SA 4.0
TSB 2492



P.L. Nimis CC BY-SA 4.0
TSB 2492



E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (16637)
2008.03.10
lower surface


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Leptogium_hildenbrandii.htm
France, session AFL Luberon 2009 - Vaucluse


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=560&lang=en
France, Drôme Remuzat