Polyozosia sambuci (Pers.) S.Y. Kondr., Lőkös & Farkas

in Kondratyuk & al., Acta Bot. Hung., 61, 1-2: 157, 2019. Basionym: Lichen sambuci Pers. - Ann. Bot. (Usteri), 7: 26, 1794.
Synonyms: Lecanora sambuci (Pers.) Nyl.; Lecanora sambucioides H. Magn.; Myriolecis sambuci (Pers.) Clem.
Distribution: N - VG, Ven (Nascimbene & Marini 2010), TAA (Nascimbene & al. 2007b), Piem (Piervittori 2003, Isocrono & al. 2004), Emil (Bassi 1995, Fariselli & al. 2020), Lig. C - Tosc (Loppi & Putortì 1995b), Marc (Frati & al. 2004), Umb (Genovesi & al. 2001, Ravera & al. 2006), Abr (Nimis & Tretiach 1999), Mol (Nimis & Tretiach 1999, Caporale & al. 2008, Genovesi & Ravera 2014), Sar (Zedda 2002, Rizzi & al. 2011, Di Nuzzo & al. 2022). S - Camp (Aprile & al. 2003b, Garofalo & al. 2010, Catalano & al. 2012, 2016), Pugl (Nimis & Tretiach 1999), Bas (Nimis & Tretiach 1999, Brackel 2011), Cal (Puntillo 1996), Si.
Description: Thallus crustose, endosubstratic or very thinly episubstratic, continuous or minutely granulose, white or whitish grey, often poorly evident. Apothecia lecanorine, sessile, 0.2-0.6(-0.8) mm across, with a grey-brown to reddish brown, flat to slightly convex, sometimes slightly pruinose disc and a white-pruinose, prominent, usually smooth or irregularly crenulate thalline margin. Thalline exciple c. 80 µm wide, corticate, the cortex 20–30 μm thick laterally, 30–60 μm thick at base, the medullary part filled with small crystals insoluble in K but soluble in N; proper exciple not evident; epithecium yellowish brown, rarely with a few superficial granules; hymenium colourless, 40-70 µm high; paraphyses simple, thick, capitate, brown-pigmented at tips, usually free in K; hypothecium colourless, without granules. Asci (8-)16-32-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, ellipsoid, (6.5-)8-10(-12) x (3-)4-6(-7.5) µm. Pycnidia frequent, black, erumpent. Conidia 10-12 x c. 1 µm, straight or curved. Photobiont chlorococcoid. Spot tests: thallus and apothecial margin K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a mainly mild-temperate species found on base-rich bark, especially on Sambucus and Populus.
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: very rare
Submediterranean belt: rather rare
Padanian area: extremely rare
Humid submediterranean belt: rather rare
Humid mediterranean belt: very rare
Dry mediterranean belt: extremely 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
DOLICHENS

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



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11237)
2001/12/08


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


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



Domenico Puntillo; Owner: Domenico Puntillo
Italy



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (17387)
2001/11/26


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/


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


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_M/Texte_M/Myriolecis_sambuci.htm
France, Brives-Charensac - Haute-Loire
8/11/2016


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_M/Texte_M/Myriolecis_sambuci.htm
France, Brives-Charensac - Haute-Loire
8/11/2016


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_M/Texte_M/Myriolecis_sambuci.htm
France, Brives-Charensac - Haute-Loire
8/11/2016


Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe: Germany, Hesse, Wetterau. Coll. C. Parson. On Juglans regia


Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe: Germany, Hesse, Wetterau. Coll. C. Parson. On Juglans regia


Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe: Germany, Hesse, Wetterau. Coll. C. Parson. On Juglans regia



P.L. Nimis CC BY-SA 4.0
TSB 17387


Wolfgang von Brackel - CC BY-4.0
Germany, Bavaria, Hohenfels