Lepraria leuckertiana (Zedda) L. Saag

in Saag & al., Lichenologist, 41: 41, 2009. Basionym: Lecanora leuckertiana Zedda - Nova Hedwigia, 71: 108, 2000.
Synonyms:
Distribution: N - TAA (Nascimbene & al. 2014, Nascimbene 2014, Nascimbene & Marini 2015, Trindade & al. 2021). C - Sar (Zedda 2000b, 2002, 2002c, Zedda & al. 2001).
Description: Thallus leprose, cottony and powdery to granular, thick, whitish green to grey-green, diffuse or weakly delimited, firmly attached to the substratum, the margins delimited, but not forming true lobes (obscure sublobes sometimes present). Granules soredia-like, abundant, fine to coarse, up to 500 μm in diam., not well separated from each other, without projecting hyphae. Medulla present, well developed, white, forming a cottony layer which is sometimes exposed in patches. Hypothallus absent. Photobiont chlorococcoid, the cells 10-12 µm wide. Spot tests: K-, C-, KC-, P-. Chemistry: usnic acid, zeorin, isousnic acid (traces), triterpenes.
Note: on old trees in humid, but well-lit situations, with optimum in humid Mediterranean forests. The species has been reported also from eastern central Europe, but these records may refer to another lichen (see Bayerovà & Kukwa 2004). It is included in the Italian red list of epiphytic lichens as “Endangered” (Nascimbene & al. 2013c).
Growth form: Leprose
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: absent
Oromediterranean belt: absent
Montane belt: absent
Submediterranean belt: absent
Padanian area: absent
Humid submediterranean belt: extremely rare
Humid mediterranean belt: very rare
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

Harrie Sipman – Source http://www.bgbm.fu-berlin.de/sipman/Zschackia/AegeanLichens/CaloplacaAC.htm - As Caloplaca oasis