ITALIC 8.0

Lecanora eminens Asta, Clauzade & Cl. Roux

in Vězda, Lich. Sel. Exs., Fasc. 55: 7, no. 1316, 1975

Synonyms: Lecanora prominens Asta, Clauzade & Cl. Roux non Clauzade & Vězda

Distribution:

Description: Thallus crustose, episubstratic, rimose or consisting of scattered to more rarely contiguous areoles, chalky white, yellowish white or pale yellowish green, often delimited by a dark prothallus, the areoles mostly flat, measuring 0.6-1.8 x 0.2-0.8 mm. Apothecia lecanorine, 0.6-2.2 mm across, with a black, grey-black to dark bluish green disc (sometimes grey-brown when young) and a thick, raised, persistent thalline margin. Thalline exciple 40-80 µm wide laterally, poorly differentiated from the 50-100 µm wide proper exciple, their structure masked by numerous small crystals; epithecium medium brown but often blue-green-spotted, with an epipsamma of very thin crystals, the bluish parts N+ purple; hymenium colourless, 40-50 µm high; paraphyses rather lax, branched in upper part, the apical cells swollen, 3-6 µm wide; hypothecium and subhymenium colourless, the hypothecium with large crystals visible under polarized light. Asci 8-spored, clavate, Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid, 6-9 x 3-5 µm. Photobiont chlorococcoid. Spot tests: thallus K+ faintly yellow, C-, KC+ yellow; apothecial margin P+ yellow-orange. Chemistry: thallus with usnic acid, apothecial margin with psoromic acid.

Note: on schists poor in calcium carbonate, usually on south-exposed steep faces in the alpine belt; known from the Pyrenees and from a few localities of the Western Alps (France); to be looked for in the Italian Alps.

Growth form: Crustose

Substrata: rocks

Photobiont: green algae other than Trentepohlia

Reproductive strategy: mainly sexual

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

Detail from: Modified from the original at: https://gzu.jacq.org/GZU000291931

GZU 000291931 - Asta,J. & Roux,C. Vězda, A.: Lichenes Selecti Exsiccati 1316 - 1974-07-01 Location France / Provence-Alpes-Côte d'Azur Label Gallia. Hautes-Alpes, L'Argentière-la-Bessée, vallis Salce, inter rupes La Balme, La Grande Cabane et la Tête de Clausis dictas ; Alt. 2150 m Habitat Ad parietes subverticales rupium schistosarum

Detail from: Modified from the original at: https://gzu.jacq.org/GZU000291931

GZU 000291931 - Asta,J. & Roux,C. Vězda, A.: Lichenes Selecti Exsiccati 1316 - 1974-07-01 Location France / Provence-Alpes-Côte d'Azur Label Gallia. Hautes-Alpes, L'Argentière-la-Bessée, vallis Salce, inter rupes La Balme, La Grande Cabane et la Tête de Clausis dictas ; Alt. 2150 m Habitat Ad parietes subverticales rupium schistosarum

Modified from the original at: https://gzu.jacq.org/GZU000291931

GZU 000291931 - Asta,J. & Roux,C. Vězda, A.: Lichenes Selecti Exsiccati 1316 - 1974-07-01 Location France / Provence-Alpes-Côte d'Azur Label Gallia. Hautes-Alpes, L'Argentière-la-Bessée, vallis Salce, inter rupes La Balme, La Grande Cabane et la Tête de Clausis dictas ; Alt. 2150 m Habitat Ad parietes subverticales rupium schistosarum