Polyozosia hagenii (Ach.) S.Y. Kondr., Lőkös & Farkas
in Kondratyuk & al., Acta Bot. Hung., 61, 1-2: 156, 2019. Basionym: Lichen hagenii Ach. - Lichenogr. Suec. Prodr.: 57, 1799.
Synonyms: Lecanora bormiensis Nyl.; Lecanora hagenii (Ach.) Ach.; Lecanora hagenii var. bormiensis (Nyl.) Dalla Torre & Sarnth.; Lecanora hagenii var. lithophila (Wallr.) Flot.?; Lecanora hagenii var. ocellulata (A. Massal.) Bagl.; Lecanora hagenii var. umbrina Ach.; Lecanora nigrescens Stein; Lecanora sommerfeltiana var. ocellulata A. Massal.; Lecanora umbrina (Ach.) A. Massal.; Myriolecis hagenii (Ach.) Śliwa, Zhao Xin & Lumbsch
Description: Thallus endosubstratic, not visible, very rarely thinly episubstratic and bluish green. Apothecia lecanorine, sessile, 0.3-0.6(-0.9) mm across, with a pale to dark brown, slightly to heavily pruinose disc and a white-pruinose, prominent, usually weakly incised thalline margin. Thalline exciple 75-90 μm thick, with an indistinctly delimited cortex obscured by granules which are insoluble in K but soluble in N; proper exciple almost indistinct; epithecium yellowish brown, with superficial coarse granules insoluble in K and soluble in N and a fine epipsamma of crystals located above the paraphyses tips, which are insoluble in K and soluble in N; hymenium colourless, 35-60 µm high; paraphyses simple, thick, slightly expanded or capitate, brown pigmented at tips, usually free in K; 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, ellipsoid, (8-)9-13(-16) x 4-5(-7) µm. Photobiont chlorococcoid. Spot tests: thallus (apothecial margin) K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Growth form: Crustose
Substrata: bark and rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Pioneer species
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: very rare
Montane belt: rather rare
Dry submediterranean belt: extremely common
Humid submediterranean belt: extremely common
Padanian area: rather rare
pH of the substrata:
1 2 3 4 5
Solar irradiation:
1 2 3 4 5
Aridity:
1 2 3 4 5
Eutrophication:
1 2 3 4 5
Poleotolerance:
0 1 2 3
Altitudinal distribution:
1 2 3 4 5 6
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
Loading data...
Occurrence data
Predictive map
Current prediction (1981-2010)
Future prediction (2071-2100) SSP 1-2.6
Future prediction (2071-2100) SSP 5-8.5Predictive maps according to Francesconi et al. 2025
Felix Schumm – CC BY-SA 4.0
[3139b zusammen mit Calicium salicinum], Germany, Baden-Württemberg, Schwarzwald, Weg vom Feldberg zur Zastler Hütte, ca. 1300 m, MTB: 8114. Leg. F. Schumm & H.-J. Wolf, 30.08.1987, det. F. Schumm 1987.

Felix Schumm – CC BY-SA 4.0
[3139b zusammen mit Calicium salicinum], Germany, Baden-Württemberg, Schwarzwald, Weg vom Feldberg zur Zastler Hütte, ca. 1300 m, MTB: 8114. Leg. F. Schumm & H.-J. Wolf, 30.08.1987, det. F. Schumm 1987.

Felix Schumm – CC BY-SA 4.0
[3139b zusammen mit Calicium salicinum], Germany, Baden-Württemberg, Schwarzwald, Weg vom Feldberg zur Zastler Hütte, ca. 1300 m, MTB: 8114. Leg. F. Schumm & H.-J. Wolf, 30.08.1987, det. F. Schumm 1987.

Felix Schumm – CC BY-SA 4.0
[3139b zusammen mit Calicium salicinum], Germany, Baden-Württemberg, Schwarzwald, Weg vom Feldberg zur Zastler Hütte, ca. 1300 m, MTB: 8114. Leg. F. Schumm & H.-J. Wolf, 30.08.1987, det. F. Schumm 1987.

Felix Schumm – CC BY-SA 4.0
[3139b zusammen mit Calicium salicinum], Germany, Baden-Württemberg, Schwarzwald, Weg vom Feldberg zur Zastler Hütte, ca. 1300 m, MTB: 8114. Leg. F. Schumm & H.-J. Wolf, 30.08.1987, det. F. Schumm 1987.

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (31022)
2001/12/05

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_M/Texte_M/Myriolecis_hagenii.htm
France, 2/9/2014 - Bonneval-sur-Arc

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_M/Texte_M/Myriolecis_hagenii.htm
France, 23/7/2014 - St-Paul-sur-Ubaye - Alpes-de-Provence

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_M/Texte_M/Myriolecis_hagenii.htm
France, 27/1/2017 - Névache

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_M/Texte_M/Myriolecis_hagenii.htm
France, 27/1/2017 - Névache

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_M/Texte_M/Myriolecis_hagenii.htm
France, 27/1/2017 - Névache

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_M/Texte_M/Myriolecis_hagenii.htm
France, 27/1/2017 - Névache

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_M/Texte_M/Myriolecis_hagenii.htm
France, 27/1/2017 - Névache

Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1094&lang=en
France, Rostellec
f. gregata

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1366&lang=en
France, Roscanvel

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1366&lang=en
France, Roscanvel

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1366&lang=en
France, Roscanvel

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1366&lang=en
France, Roscanvel

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1366&lang=en
France, Roscanvel

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1366&lang=en
France, Roscanvel

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1366&lang=en
France, Roscanvel

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1366&lang=en
France, Roscanvel

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1366&lang=en
France, Roscanvel

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1366&lang=en
France, Roscanvel

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=1366&lang=en
France, Roscanvel

Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe; Germany; Hesse. Coll Windsch, det Windisch/Kirschbaum.

Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe; Germany; Hesse. Coll Windsch, det Windisch/Kirschbaum.
Growth form: Crustose
Substrata: bark and rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Pioneer species
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: very rare
Montane belt: rather rare
Dry submediterranean belt: extremely common
Humid submediterranean belt: extremely common
Padanian area: rather rare
pH of the substrata:
| 1 | 2 | 3 | 4 | 5 |
Solar irradiation:
| 1 | 2 | 3 | 4 | 5 |
Aridity:
| 1 | 2 | 3 | 4 | 5 |
Eutrophication:
| 1 | 2 | 3 | 4 | 5 |
Poleotolerance:
| 0 | 1 | 2 | 3 |
Altitudinal distribution:
| 1 | 2 | 3 | 4 | 5 | 6 |
Rarity
absent
extremely rare
very rare
rare
rather rare
rather common
common
very common
extremely common
Loading data...
Occurrence data
Predictive map
Current prediction (1981-2010)
Future prediction (2071-2100) SSP 1-2.6
Future prediction (2071-2100) SSP 5-8.5Predictive maps according to Francesconi et al. 2025

