Lecanora varia (Hoffm.) Ach.

Lichenogr. Univ.: 377, 1810. Basionym: Patellaria varia Hoffm. - Descr. Adumbr. Pl. Crypt. Lich., 1: 102, 1790.
Synonyms: Lecanora subvaria Nyl.; Lecanora varia var. denudata Bagl.
Distribution: N - Frl, Ven (Nimis 1994, Nascimbene & Caniglia 2002c, 2003c, Nascimbene & al. 2006e, Thor & Nascimbene 2007, Nascimbene & Marini 2007, Nascimbene 2008c), TAA (Nascimbene & Caniglia 2000b, 2002c, Caniglia & al. 2002, Nascimbene 2003, 2005b, 2006c, 2008, 2008b, 2013, 2014, Nascimbene & al. 2005, 2006, 2006e, 2007b, 2008c, 2009, 2010, 2014, 2022, Stofer 2006, Nimis & al. 2015), Lomb (Dalle Vedove & al. 2004, Nascimbene & al. 2006e, Gheza 2019b), Piem (Isocrono & al. 2004, 2006), VA (Piervittori & Isocrono 1999, Matteucci & al. 2008, Loppi 2014), Emil (Fariselli & al. 2020), Lig. C - Tosc (Loppi & Putortì 1995b), Marc, Umb (Ravera 2000, Ravera & al. 2006), Laz (Ravera & al. 1999, Munzi & al. 2007, Ravera & Genovesi 2008), Abr (Nimis & Tretiach 1999, Gheza & al. 2021), Mol (Nimis & Tretiach 1999, Caporale & al. 2008), Sar (Nöske 2000). S - Camp, Pugl, Bas (Brackel & Puntillo 2023), Cal (Puntillo 1996, Puntillo & Puntillo 2004, 2014c, Incerti & Nimis 2006, Brackel & Puntillo 2023), Si.
Description: Thallus crustose, episubstratic, rimose-areolate to warted, ecorticate, yellowish, yellowish green, more rarely greenish grey, without a distinct prothallus, the areoles irregular in outline, 0.15-0.3(-0.5) mm wide, weakly convex. Apothecia lecanorine, round to irregular in outline, sessile and constricted at base, 0.5-1.5 mm across, urceolate when young, with a yellowish green to orange-brown, flat, dull, white-pruinose disc, and a prominent, often inrolled, sinuous, persistent thalline margin. Thalline exciple corticate, the cortex 25-80 µm thick laterally, 90-150 µm near base, the hyphae with 1.5-2.5 µm wide lumina, the medullary part rich in algae; epithecium colourless to pale brown, 6-13 µm high, with many small yellow-brown granules soluble in K; hymenium colourless, 50-90 µm high; paraphyses simple or sparingly branched and anastomosing, 1.5-2 µm thick at mid-level, the apical cells hardly swollen; hypothecium colourless in upper part, pale yellow in lower part, 30-40 µm high. Asci 8-spored, clavate, Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid, 10-12.5 x 4-5.5 µm. Conidia thread-like, often curved, 12-22 µm long. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC- or KC+ pale yellow, P+ bright yellow, UV+ dull orange. Chemistry: usnic, psoromic and 29-O-demethylpsoromic acids, sometimes with additional diffractaic acid.
Note: a cool-temperate to circumboreal-montane lichen found on hard lignum, more rarely on smooth, hard, acid bark, especially of conifers, in upland areas; most frequent in the Alps, but also occurring in the Mediterranean mountains.
Growth form: Crustose
Substrata: bark and lignum
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: rare
Subalpine belt: rather common
Oromediterranean belt: absent
Montane belt: 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

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


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



Juri Nascimbene - CC BY-SA 4.0
Paneveggio, Reg. Trentino-Alto Adige Prov. Trento, Italy.
2009



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


Andres Saag; Owner: University of Tartu



P.L. Nimis CC BY-SA 4.0
TSB 42422



P.L. Nimis CC BY-SA 4.0
TSB 42422



P.L. Nimis CC BY-SA 4.0
TSB 42422



P.L. Nimis CC BY-SA 4.0
TSB 42422



P.L. Nimis CC BY-SA 04
TSB 14746



P.L. Nimis CC BY-SA 4.0
TSB 42422