Leptogium saturninum (Dicks.) Nyl.
Act. Soc. Linn. Bordeaux, 21: 272, 1856. Basionym: Lichen saturninus Dicks. - Fasc. Pl. Crypt. Brit., 2: 21, 1790.
Synonyms: Collema myochroum (Ehrh.) Rabenh.; Collema saturninum (Dicks.) DC.; Leptogium myochroum (Ehrh.) Nyl.; Mallotium saturninum (Dicks.) Gray; Mallotium tomentosum (Hoffm.) Körb.
Description: Thallus foliose, broad-lobed, 2-8(-10) cm in diam., adnate, the lobes irregular, elongate, flat to concave, separate, 5-15(-20) mm wide, 120-172 μm thick, the apices rotund, entire to irregularly cut and isidiate, sometimes upturned, Upper surface dark olivaceous grey to almost black, usually dull, not much wrinkled, homogeneously covered with scattered to dense, granular, globose to shortly elongate, black isidia which are usually darker than the thallus. Lower surface pale to medium brown, wrinkled, covered in a dense white tomentum of white hairs (to 0.2 mm long), with long-cylindrical cells measuring 6-12 x 4-4.5 µm. Upper and lower cortices consisting of a single layer of irregularly isodiametrical cells, internal part of thallus with loosely interwoven chains of Nostoc and hyphae. Apothecia very rare, lecanorine, laminal, sessile, 0.5-2.5 mm across, with a brown disc and a smooth to granulose-isidiate thalline margin. Exciple euparaplectenchymatous; epithecium brownish; hymenium colourless, 100-125 µm high, I+ blue; paraphyses simple, 1-2 µm thick at mid-level, the apical cells slightly swollen; hypothecium pale yellow. Asci 8-spored, cylindrical-clavate, the apex strongly thickened, the apical dome K/I+ pale blue, with a downwardly projecting K/I+ deep blue tubular structure. Ascospores submuriform with 3-4 transverse septa and 1 longitudinal septum, hyaline, ellipsoid to subfusiform, 20-25 x 7-10 µm. Photobiont cyanobacterial (Nostoc, the cells 4-6 µm wide, arranged in chains of 8-12). Spot tests: all negative. Chemistry: without lichen substances.
Growth form: Foliose, broad lobed
Substrata: bark
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly asexual, by isidia, or isidia-like structures (e.g. schizidia)
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: extremely rare
Montane belt: rare
Dry submediterranean belt: extremely rare
Humid submediterranean belt: very rare
Padanian area: absent
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
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Occurrence data
Predictive map

P.L.Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (37009)
2008.02.28

E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (5239)
2008.03.10
lower surface

E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (33327)
2008.04.02

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_2/Leptogium_saturninum.htm
France, 2011 - Mont Saxonnex - Haute-Savoie

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_2/Leptogium_saturninum.htm
France, 2011 - Mont Saxonnex - Haute-Savoie

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_2/Leptogium_saturninum.htm
France, 2011 - Mont Saxonnex - Haute-Savoie

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_2/Leptogium_saturninum.htm
France, 2011 - Mont Saxonnex - Haute-Savoie

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_2/Leptogium_saturninum.htm
France, 2011 - Mont Saxonnex - Haute-Savoie

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_L/Texte_L_2/Leptogium_saturninum.htm
France, 2011 - Mont Saxonnex - Haute-Savoie

Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Austria; Alps: Tirol.

Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Austria; Alps: Tirol.

Felix Schumm - CC BY-SA 4.0
[820], Germany, Bayern, Kreis Oberallgäu, Missen westlich Immenstadt,
ca. 860 m, an Straßenbaum (Sorbus aucuparia), hell und
trocken. TK: 8426/2. Leg. F. Schumm, 20.08.1968, det. Dr. Oscar
Klement.

Felix Schumm - CC BY-SA 4.0
[820], Germany, Bayern, Kreis Oberallgäu, Missen westlich Immenstadt,
ca. 860 m, an Straßenbaum (Sorbus aucuparia), hell und
trocken. TK: 8426/2. Leg. F. Schumm, 20.08.1968, det. Dr. Oscar
Klement.

Felix Schumm - CC BY-SA 4.0
[2061], Schweiz, Herrenrüti, östlich von Engelberg (Map 679/183), ca.
1170-1250 m, an Acer pseudoplatanus. Leg. F. Schumm, 04.09.1972,
det. F. Schumm

Felix Schumm - CC BY-SA 4.0
[2061], Schweiz, Herrenrüti, östlich von Engelberg (Map 679/183), ca.
1170-1250 m, an Acer pseudoplatanus. Leg. F. Schumm, 04.09.1972,
det. F. Schumm

Felix Schumm - CC BY-SA 4.0
[2061], Schweiz, Herrenrüti, östlich von Engelberg (Map 679/183), ca.
1170-1250 m, an Acer pseudoplatanus. Leg. F. Schumm, 04.09.1972,
det. F. Schumm

Felix Schumm - CC BY-SA 4.0
[2913], Nordjugoslawien, Slowenien: koloniebildend an glatten moosigen
Borkenpartien der halbschattigen Mittelstämme älterer freistehender
Laubbäume im Physcietum ascendentis Frey., 1100 m, SO-SW,
pH 6.5, offener waldrebenreicher Kalkbuchenwald im Planicatal. Leg.
G. Follmann, 07.1980, det. G. Follman. EX G. FOLLMANN: LICHENES
EXSICCATI SELECTI A MUSEO HISTORIAE NATURALIS CASSELENSI EDITI
NR. 368

Felix Schumm - CC BY-SA 4.0
[2913], Nordjugoslawien, Slowenien: koloniebildend an glatten moosigen
Borkenpartien der halbschattigen Mittelstämme älterer freistehender
Laubbäume im Physcietum ascendentis Frey., 1100 m, SO-SW,
pH 6.5, offener waldrebenreicher Kalkbuchenwald im Planicatal. Leg.
G. Follmann, 07.1980, det. G. Follman. EX G. FOLLMANN: LICHENES
EXSICCATI SELECTI A MUSEO HISTORIAE NATURALIS CASSELENSI EDITI
NR. 368

Felix Schumm - CC BY-SA 4.0
[21062], Austria, Steiermark (=Styria), Eastern Alps, Wölz Tauern,
16.8 km SSE of Irding, 47°21'23'' N, 14°09'28'' ", 1085 m, on Alnus
incana. Leg. W. Obermayer, 15.08.2020, det. W. Obermayer. - EX W.
OBERMAYER: DUPLA GRAECENSIA LICHENUM NR. 1234.

Felix Schumm - CC BY-SA 4.0
[21062], Austria, Steiermark (=Styria), Eastern Alps, Wölz Tauern,
16.8 km SSE of Irding, 47°21'23'' N, 14°09'28'' ", 1085 m, on Alnus
incana. Leg. W. Obermayer, 15.08.2020, det. W. Obermayer. - EX W.
OBERMAYER: DUPLA GRAECENSIA LICHENUM NR. 1234.

Felix Schumm - CC BY-SA 4.0
[VZ1106], Romania. Distr. Hunedoara. Montes Retezat, in valle
Lapu ul Mic, 1000 m. Ad corticem Aceris pseudoplatani. Leg. A.
V zda, 07.06.1972. - EX A. V ZDA: LICHENES SELECTI EXSICCATI NR.
1106.

Felix Schumm - CC BY-SA 4.0
[VZ1106], Romania. Distr. Hunedoara. Montes Retezat, in valle
Lapu ul Mic, 1000 m. Ad corticem Aceris pseudoplatani. Leg. A.
V zda, 07.06.1972. - EX A. V ZDA: LICHENES SELECTI EXSICCATI NR.
1106.

Felix Schumm - CC BY-SA 4.0
[VZ1106], Romania. Distr. Hunedoara. Montes Retezat, in valle
Lapu ul Mic, 1000 m. Ad corticem Aceris pseudoplatani. Leg. A.
V zda, 07.06.1972. - EX A. V ZDA: LICHENES SELECTI EXSICCATI NR.
1106.

Felix Schumm - CC BY-SA 4.0
[VZ1106], Romania. Distr. Hunedoara. Montes Retezat, in valle
Lapu ul Mic, 1000 m. Ad corticem Aceris pseudoplatani. Leg. A.
V zda, 07.06.1972. - EX A. V ZDA: LICHENES SELECTI EXSICCATI NR.
1106.

Felix Schumm - CC BY-SA 4.0
[VZ1106], Romania. Distr. Hunedoara. Montes Retezat, in valle
Lapu ul Mic, 1000 m. Ad corticem Aceris pseudoplatani. Leg. A.
V zda, 07.06.1972. - EX A. V ZDA: LICHENES SELECTI EXSICCATI NR.
1106.

Felix Schumm - CC BY-SA 4.0
[VZ1106], Romania. Distr. Hunedoara. Montes Retezat, in valle
Lapu ul Mic, 1000 m. Ad corticem Aceris pseudoplatani. Leg. A.
V zda, 07.06.1972. - EX A. V ZDA: LICHENES SELECTI EXSICCATI NR.
1106.

Felix Schumm - CC BY-SA 4.0
[VZ1106], Romania. Distr. Hunedoara. Montes Retezat, in valle
Lapu ul Mic, 1000 m. Ad corticem Aceris pseudoplatani. Leg. A.
V zda, 07.06.1972. - EX A. V ZDA: LICHENES SELECTI EXSICCATI NR.
1106.

Felix Schumm - CC BY-SA 4.0
[VZ1106], Romania. Distr. Hunedoara. Montes Retezat, in valle
Lapu ul Mic, 1000 m. Ad corticem Aceris pseudoplatani. Leg. A.
V zda, 07.06.1972. - EX A. V ZDA: LICHENES SELECTI EXSICCATI NR.
1106.

Felix Schumm - CC BY-SA 4.0
[VZ1106], Romania. Distr. Hunedoara. Montes Retezat, in valle
Lapu ul Mic, 1000 m. Ad corticem Aceris pseudoplatani. Leg. A.
V zda, 07.06.1972. - EX A. V ZDA: LICHENES SELECTI EXSICCATI NR.
1106.

Felix Schumm - CC BY-SA 4.0
[VZ1106], Romania. Distr. Hunedoara. Montes Retezat, in valle
Lapu ul Mic, 1000 m. Ad corticem Aceris pseudoplatani. Leg. A.
V zda, 07.06.1972. - EX A. V ZDA: LICHENES SELECTI EXSICCATI NR.
1106.

Collezione lichenologica Abramo Massalongo del Museo di Storia Naturale G. Ligabue di Venezia - Autori: Seggi, Linda; Trabucco, Raffaella Proprietà: Fondazione Musei Civici di Venezia - CC BY-NC
Italy, Veneto, in op. Badia
as Mallotium myochroum
Growth form: Foliose, broad lobed
Substrata: bark
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly asexual, by isidia, or isidia-like structures (e.g. schizidia)
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: extremely rare
Montane belt: rare
Dry submediterranean belt: extremely rare
Humid submediterranean belt: very rare
Padanian area: absent
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

