Polyozosia persimilis (Th. Fr.) S.Y. Kondr., Lőkös & Farkas

in Kondratyuk & al., Acta Bot. Hung., 62, 1-2: 103, 2020. Basionym: Lecanora hagenii subsp. persimilis Th. Fr. - Lichenogr. Scand., 1: 251, 1871.
Synonyms: Lecanora persimilis (Th. Fr.) Arnold; Myriolecis persimilis (Th. Fr.) Śliwa, Zhao Xin & Lumbsch
Distribution: N - Emil (Nimis & al. 1996, Fariselli & al. 2020). C - Marc (Nimis & Tretiach 1999), Umb (Nimis & Tretiach 1999, Ravera & al. 2006, Panfili 2007), Mol (Nimis & Tretiach 1999, Caporale & al. 2008), Sar. S - Pugl (Nimis & Tretiach 1999), Si (TSB 21465).
Description: Thallus crustose, endosubstratic or rarely very thinly episubstratic, grey, usually inconspicuous. Apothecia cryptolecanorine, broadly attached, often crowded or in groups of 2-4, round to irregular in outline by mutual compression, 0.2-0.4(-0.6) mm across, with a concave to flat, smooth, brown, reddish brown to rarely brown-black, epruinose disc, and a concolorous, thin, persistent, usually slightly raised, smooth, entire or slightly crenate, epruinose or slightly grey-pruinose margin. Thalline exciple 80-90 μm thick, corticate, the algal cells sparse or concentrated in the lower part, usually absent in upper part, giving the apothecia a biatorine appearance; cortex of adglutinated hyphae or prosoplectenchymatous, the external hyphae enlarged and blue-green, with sparse granules throughout or in outer part only; proper exciple distinct, thin; epithecium brown or olive-brown, K-, sometimes with sparse granules partly soluble in K and soluble in N; hymenium colourless, 45-60 μm high; paraphyses coherent, slender, simple or sparingly branched, the apical cells slightly expanded; hypothecium colourless, 40-50 μm high, without granules. Asci (4-)8-spored, elongate-clavate, very thin-walled, with a K/I+ blue, tall tholus penetrated by a faintly amyloid apical cushion, the wall K/I-, surrounded by a K/I+ blue outer layer, Lecanora-type. Ascospores 1-celled, hyaline, broadly ellipsoid to ellipsoid, 6-14 x 4-8 μm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-. Chemistry: with variable amounts of variolaric acid.
Note: a mild-temperate to Mediterranean lichen which is easily overlooked, most frequent on branches of Fraxinus, Populus and Sambucus;, probably more widespread throughout Italy.
Growth form: Crustose
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

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

pH of the substrata:

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(info)

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

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



Felix Schumm – CC BY-SA 4.0
[13250], Germany, Baden-Württemberg, Kreis Göppingen, Spielburg beim Hohenstaufen, 570 m, an Kirsche, TK 7224. Leg. et det. Schumm, 15.07.2007.



Felix Schumm – CC BY-SA 4.0
[13250], Germany, Baden-Württemberg, Kreis Göppingen, Spielburg beim Hohenstaufen, 570 m, an Kirsche, TK 7224. Leg. et det. Schumm, 15.07.2007.



Felix Schumm – CC BY-SA 4.0
[13250], Germany, Baden-Württemberg, Kreis Göppingen, Spielburg beim Hohenstaufen, 570 m, an Kirsche, TK 7224. Leg. et det. Schumm, 15.07.2007.



Felix Schumm – CC BY-SA 4.0
[13250], Germany, Baden-Württemberg, Kreis Göppingen, Spielburg beim Hohenstaufen, 570 m, an Kirsche, TK 7224. Leg. et det. Schumm, 15.07.2007.



Felix Schumm – CC BY-SA 4.0
[13250], Germany, Baden-Württemberg, Kreis Göppingen, Spielburg beim Hohenstaufen, 570 m, an Kirsche, TK 7224. Leg. et det. Schumm, 15.07.2007.



Felix Schumm – CC BY-SA 4.0
[13250], Germany, Baden-Württemberg, Kreis Göppingen, Spielburg beim Hohenstaufen, 570 m, an Kirsche, TK 7224. Leg. et det. Schumm, 15.07.2007.



Felix Schumm – CC BY-SA 4.0
[13250], Germany, Baden-Württemberg, Kreis Göppingen, Spielburg beim Hohenstaufen, 570 m, an Kirsche, TK 7224. Leg. et det. Schumm, 15.07.2007.



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (13152)
2001/11/25


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/



P.L. Nimis CC BY-SA 4.0
TSB 13152