Lepraria eburnea J.R. Laundon

Lichenologist, 24: 331, 1992.
Synonyms: Lepraria frigida J.R. Laundon
Distribution: N - Frl (Baruffo & al. 2006), VG (Baruffo & al. 2006), Ven (Baruffo & al. 2006), TAA (Leuckert & al. 2002, Baruffo & al. 2006, Bilovitz & al. 2014, Nascimbene & al. 2014, Nascimbene 2014, Nascimbene & Marini 2015, Trindade & al. 2021), Lomb (Ravera & al. 2018), VA (TO 3232), Emil (Baruffo & al. 2006, Fariselli & al. 2020), Lig (Baruffo & al. 2006, Giordani & al. 2016). C - Tosc (Baruffo & al. 2006, Benesperi & al. 2007), Marc (Baruffo & al. 2006), Umb (Baruffo & al. 2006, Ravera & al. 2006, Panfili 2007), Laz (Baruffo & al. 2006), Abr (Nimis & Tretiach 1999, Baruffo & al. 2006, Corona & al. 2016, Di Nuzzo & al. 2021, Gheza & al. 2021), Mol (Nimis & Tretiach 1999, Baruffo & al. 2006, Caporale & al. 2008). S - Cal (Baruffo & al. 2006).
Description: Thallus leprose, cottony, whitish to greenish grey, often with a yellowish tinge, sharply delimited, orbicular at least when young, usually without marginal lobes, but sometimes almost sublobate, consisting of a mass of powdery, spherical granules up to 200 µm wide, with protruding hyphae, but never clam-shaped. Medulla white, generally evident, UV+ violet, the hyphae 2-5 µm thick, covered by small colourless crystals. Ascocarps and pycnidia not known. Photobiont chlorococcoid, the cells up to 20 µm diam. Spot tests: K- or K+ yellowish, C+ faint yellow or pink, KC+ reddish orange (reaction sometimes ephemeral), P+ yellow slowly becoming orange or P+ rapidly orange Chemistry: 3 chemotypes: 1) alectorialic acid only, 2) alectorialic and protocetraric acids, 3) alectorialic and psoromic acids.
Note: on old trunks in underhangs protected from rain, but also on walls in urban areas; certainly more common throughout the country.
Growth form: Leprose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)
In underhangs rarely wetted by rain

Commonnes-rarity: (info)

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

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


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (32753)
2001/12/13



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (32753)
2001/12/13