ITALIC 8.0

Lecanora farinaria Borrer

in Hooker & Sowerby, Suppl. Engl. Bot., 2: tab. 2727, 1834

Synonyms:

Distribution:

Description: Thallus crustose, endosubstratic or thinly episubstratic, up to 0.1 mm thick, continuous to areolate, grey-white, sometimes with a yellowish tinge, more rarely greenish brown, smooth, sorediate. Soralia white, greenish or yellowish white, delimited to confluent, rounded to ellipsoid, 0.2-1 mm across, sometimes covering the whole thallus surface, flat to more rarely convex, often bordered by a thin thalline rim; soredia farinose, 20-50 μm wide. Apothecia, rare, lecanorine, 0.4-1(-1.5) mm across, at first immersed amongst the soredia, finally erumpent, with a pale reddish brown to black, finally convex disc and a distinct to finally excluded, initially sorediate thalline margin. Thalline exciple pulicaris-type, the medullary part with abundant, very large crystals which are insoluble in K; epithecium yellow- to green-brown, inspersed with granular crystals dissolving in K but not in N; hymenium colourless, 50-80(-100) μm high; paraphyses slightly branched in upper part, anastomosing in lower part, (1-)1.5-2 μm thick at mid-level, the apical cells not markedly swollen, up to 3 μm wide. Asci 8-spored, clavate, Lecanora-type. Ascospores 1-celled, hyaline, broadly ellipsoid to subglobose, (10-)14-18(-20) x (7-)10-13(-15) μm, thick-walled (the wall 1-1.5 μm thick). Photobiont chlorococcoid. Spot tests: thallus and soralia K+ yellow, C-, KC- or KC+ faintly yellow, P- or P+ pale yellow, UV-. Chemistry: atranorin, chloroatranorin, roccellic acid, with traces of 1-2 additional fatty acids.

Note: usually on wood but occasionally also on bark; most common in NW Europe, with scattered records from humid parts of the Alps; to be looked for in the Italian Alps.

Growth form: Crustose

Substrata: bark and lignum

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)

Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

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

Index Fungorum GBIF

Bernard Bouffinier- Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=796&lang=en

France, Huelgoat

Andrè Aptroot

Hong Kong.
Herbarium: Holotype
Source:http://www.tropicallichens.net/2168.html

Bernard Bouffinier- Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=796&lang=en

France, Huelgoat

Bernard Bouffinier- Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=796&lang=en

France, Huelgoat

Andrè Aptroot http://www.tropicallichens.net/2168.html

Holotype

Bernard Bouffinier- Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=796&lang=en

France, Huelgoat