Lecanora gisleriana Müll. Arg.

Flora, 57: 185, 1874.
Synonyms: Lecanora gisleri sensu Poelt & Ullrich
Distribution: N - VA (HAL-19112).
Description: Thallus inapparent, or of 0.1-0.3 mm wide, globulose, sometimes lobulate, ochre-coloured areoles developing on the thalli of sorediate, yellow Lecanora-species on metal-rich-rocks. Medulla white, I-. Apothecia lecanorine, 0.3-1 mm across, scattered, with a flat, at first pruinose, then epruinose, pale ochraceous brown to red-brown disc, and a smooth to strongly crenulate, ochraceous to finally brownish thalline margin. Epithecium dark brown, K-; hymenium colourless, 40-80 µm high; paraphyses sparingly branched, not anastomosing, 1-2 µm thick at mid-level, the apical cells 2-3 µm wide; hypothecium colourless. Asci 8-spored, 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 blue outer layer, Lecanora-type. Ascospores 1-celled, hyaline, fusiform with pointed ends, (7-)9-12.5 x 4-5.5 µm. Photobiont chlorococcoid. Spot tests: K-, C-, KC+ yellowish, P-, UV-. Chemistry: usnic acid.
Note: on iron rich siliceous rocks near and above treeline, parasitic on the thalli of L. epanora, L. handelii and L. subaurea. The Italian sample was collected by B. Feige on metal-rich rocks at Plan Masson near Breuil at 2500 m.
Growth form: Crustose
Substrata: rocks
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
paras crustose lichens

Commonnes-rarity: (info)

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

pH of the substrata:

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Solar irradiation:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model


Felix Schumm – CC BY-SA 4.0
[2026], Germany, Niedersachsen, nördliches Harzvorland, auf Erzschlacken von der Hüttenstätte neben der Innerste zwischen Langelsheim und Bredelem, 190 m. Leg. et det. Hans Ullrich 09.06.1967. Ex Herbario Hans Ullrich



Felix Schumm – CC BY-SA 4.0
[2026], Germany, Niedersachsen, nördliches Harzvorland, auf Erzschlacken von der Hüttenstätte neben der Innerste zwischen Langelsheim und Bredelem, 190 m. Leg. et det. Hans Ullrich 09.06.1967. Ex Herbario Hans Ullrich



Felix Schumm – CC BY-SA 4.0
[2026], Germany, Niedersachsen, nördliches Harzvorland, auf Erzschlacken von der Hüttenstätte neben der Innerste zwischen Langelsheim und Bredelem, 190 m. Leg. et det. Hans Ullrich 09.06.1967. Ex Herbario Hans Ullrich



P.L. Nimis CC BY-SA 04
TSB 9472