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, slightly gelatinous when wet, rather loosely adnate, forming large, more or less regular rosettes 5-12 cm in diam. 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 hairs to 1-1.5 mm long, and tufts of pale rhizines. Upper 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, immersed in the thallus at first, then prominent, 2-4 mm across, with a brown-red, shiny disc and a grey-brown, rather thin, usually rugose thalline margin. Asci 8-spored, cylindrical-clavate, the apex thick, with a I+ blue apical dome and a I+ blue annulus projecting downwardly. Ascospores muriform, hyaline, 16-24 x 8-10 µm. Pycnidia immersed, marginal to submarginal, 0.1-0.3 mm wide. Conidia bacilliform, with swollen apices, 4.3~5.5 x 1.3~1.6 µm. Photobiont cyanobacterial (Nostoc, 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:

12345

Solar irradiation:

12345

Aridity:

12345

Eutrophication:

12345

Poleotolerance:

0123

Altitudinal distribution:

123456


Predictive model
Herbarium samples


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