Ochrolechia alboflavescens (Wulfen) Zahlbr.

Verh. zool.-bot. Ges. Wien, 76: 94, 1927. Basionym: Lichen alboflavescens Wulfen in Jacquin - Coll. Bot., 3: 111, 1789.
Synonyms: Lecanora tartarea var. alboflavescens (Wulfen) Flot.; Ochrolechia alboflavescens f. subfarinosa Verseghy; Ochrolechia alboflavescens var. plana Verseghy; Ochrolechia papillata (Räsänen) Verseghy; Ochrolechia parella f. papillata Räsänen; Ochrolechia parella var. alboflavescens (Wulfen) Arnold; Ochrolechia tartarea var. alboflavescens (Wulfen) A. Massal.
Distribution: N - Frl, Ven (Nascimbene & Caniglia 2002c, 2003c, Nascimbene & al. 2006e, Kukwa 2011, Brackel 2013), TAA (Nascimbene & Caniglia 2000b, 2002c, Caniglia & al. 2002, Nascimbene & al. 2005, 2006, 2006e, 2007b, 2008c, 2009, 2010, 2014, 2022, Nascimbene 2006b, 2008b, 2006c, 2013, 2014, Stofer 2006, Thor & Nascimbene 2007, Kukwa 2011, Nascimbene & Marini 2015, Nimis & al. 2015, Trindade & al. 2021), Lomb (Alessio & al. 1995, Dalle Vedove & al. 2004, Nascimbene & al. 2006e), Piem (Isocrono & al. 2004, 2006, Isocrono & Piervittori 2008), VA (Piervittori & Isocrono 1999, Kukwa 2011, Matteucci & al. 2008), Emil (Fariselli & al. 2020). C - Tosc (Benesperi & al. 2007), Laz (Herb. Ravera 8246), Abr (Stofer 2006), Sar (Rizzi & al. 2011, Di Nuzzo & al. 2022). S - Camp, Pugl, Cal (Puntillo 1996).
Description: Thallus crustose, episubstratic, 0.3-0.5 mm thick, continuous to rimose or verruculose, whitish, cream-coloured, yellow-grey to brown-grey, without a distinct prothallus, sorediate. Soralia usually well-delimited, rounded or rarely irregular, crateriform to flat, rarely convex, 1-2 mm wide, grey to white; soredia granular, to 150 μm across. Apothecia rather common, lecanorine, 1-3(-4) mm across, with a pinkish brown to brown, sometimes scabrid, usually pruinose, concave to flat disc, and a smooth or rarely flexuose, epruinose, sometimes partly sorediate thalline margin. Epithecium C+ and KC+ red; hymenium and hypothecium colourless. Asci 2-4-spored, with thick, amyloid walls, Pertusaria-type. Ascospores 1-celled, hyaline, ellipsoid, (25-)30-57 x (10-)20-38 µm. Photobiont chlorococcoid. Spot tests: thallus K-, C+ yellow, P-; medulla C-. Chemistry: thallus with variolaric acid (major), lichesterinic acid (major), protolichesterinic acid, sometimes with an unknown substance (minor or traces); epithecium with gyrophoric acid (major to minor) and lecanoric acid (minor to trace).
Note: a boreal-montane species found on bark of conifers, more rarely of acid-barked deciduous trees, usually in upland areas; most frequent in the Alps, but locally common in humid parts of the Apennines.
Growth form: Crustose
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: common
Oromediterranean belt: absent
Montane belt: very 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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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model
Herbarium samples
Index Fungorum GBIF

Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (17930)
2001/12/10
soralia



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (17930)
2001/12/10



P.L.Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (37096)
2008.02.28



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



Juri Nascimbene - CC BY-SA 4.0
Stelvio National Park, Reg. Trentino-Alto Adige Prov. Trento, Italy.
07.2005



Pier Luigi Nimis CC BY-SA 4.0
TSB 41429



Pier Luigi Nimis CC BY-SA 4.0
TSB 41430


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



P.L. Nimis CC BY-SA 4.0
TSB 41430


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/
Winterlhuette Rodelbahn; altitude: Austria


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/
Winterlhuette Rodelbahn; altitude: Austria


Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/
Winterlhuette Rodelbahn; altitude: Austria


Ulrich Kirschbaum CC BY-SA 4.0 – Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Austria: Alps.