Lecanora impudens Degel.
Svensk Bot. Tidskr., 38: 50, 1944.
Synonyms: Lecanora chloropolia auct. p.p.; Lecanora chloropolia f. maculata Erichsen; Lecanora maculata (Erichsen) Almb.; Pertusaria farinacea H. Magn.; Pertusaria maculata Erichsen
Description: Thallus crustose, episubstratic, smooth to warted, grey, whitish grey or yellowish white, sorediate, the soralia maculiform, orbicular, 0.3-0.6(-1) mm across, rarely confluent, concave or flat when young, later convex, when young sometimes delimited by a thin basal thalline rim; soredia finely granulose, 40-60 µm thick, pale grey to more often pale yellow. Apothecia rare, lecanorine, sessile or slightly constricted at base, 0.5-1(-1.2) mm across, with a reddish brown, shiny disc, and a smooth, often sorediate thalline margin. Thalline exciple distinctly corticate, the cortex basally thickened, with abundant, small crystals insoluble in K; epithecium yellow-brown, the pigment not dissolving in K, without crystals; hymenium colourless, 50-80 µm high; hypothecium colourless to pale yellow, 20-45 µm high. 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, (10-)12-15 x (5.5-)8-10 µm, the wall <1 µm thick. Photobiont chlorococcoid. Spot tests: thallus and margin of apothecia K+ yellow, C-, KC-, P+ faintly yellow. Chemistry: atranorin (major), chloratranorin, zeorin, an unknown terpenoid (minor or accessory), and sometimes traces of fatty acids.
Growth form: Crustose
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: extremely 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 CC BY-SA 4.0
TSB 42129
Curtis Randall Björk – CC BY-SA 4.0
British Columbia, Clearwater Valley Date: 2010-10-03 On trunk of Populus tremuloides in mixed conifer-deciduous forest
Domenico Puntillo; Owner: Domenico Puntillo
Italy
P.L. Nimis CC BY-SA 4.0
TSB 7122
P.L. Nimis CC BY-SA 4.0
TSB 42129
Growth form: Crustose
Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: extremely 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
P.L. Nimis CC BY-SA 4.0
TSB 42129
Curtis Randall Björk – CC BY-SA 4.0
British Columbia, Clearwater Valley Date: 2010-10-03 On trunk of Populus tremuloides in mixed conifer-deciduous forest
Domenico Puntillo; Owner: Domenico Puntillo
Italy
P.L. Nimis CC BY-SA 4.0
TSB 7122
