ITALIC 8.0

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 sexual

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:

1

2

3

4

5

(info)

Solar irradiation:

1

2

3

4

5

(info)

Aridity:

1

2

3

4

5

(info)

Eutrophication:

1

2

3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

1

2

3

4

5

6

(info)

Predictive model

Index Fungorum GBIF

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