Squamarina stella-petraea Poelt
Mitt. bot. Staatss. München, 2: 540, 1958.
Synonyms:
Description: Thallus squamulose, densely white-pruinose, areolate in central part, with elongated marginal lobes, thick, forming regular rosettes when young. Squamules (2-)3-4 mm wide, flattened, smooth, the central ones almost subcrustose, the marginal ones often elongate, the edges usually not up-turned and usually not overlapping; lower surface white to pale brown also in central parts, with poorly evident, branched, thread-like rhizinoid strands. Upper cortex paraplectenchymatous, well delimited against the thick, white medulla. Apothecia lecanorine, rounded, sessile and strongly constricted at base, up to 5 mm across, with a reddish brown, smooth disc and a thick, smooth, usually persistent thalline margin. Epithecium brownish; hymenium colourless, hemiamyloid; paraphyses slightly thickened in uppr part; hypothecium colourless. Asci 8-spored, elongate-clavate, with a thin, outer amyloid layer and a thickened, amyloid tholus devoid of an ocular chamber, penetrated by an axial tube the sides of which stain I+ deeper blue, approaching the Porpidia-type. Ascospores 1-celled, hyaline, ellipsoid, 9-13(-16) x (3-)4-7 µm, thin-walled. Pycnidia dark, immersed in the squamules. Conidia thread-like. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC- or KC+ yellowish-, P-, UV-; medulla P+ yellow. Chemistry: cortex with usnic acid, medulla with psoromic and 2ʹ-O-demethylpsoromic acids.
Growth form: Squamulose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: very rare
Dry submediterranean belt: rare
Humid submediterranean belt: rather 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
Pier Luigi Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11227)
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11227)
2001/11/30
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11227)
2001/11/30
P.L. Nimis CC BY-SA 04
TSB 6091
P.L. Nimis CC BY-SA 04
TSB 6091
P.L. Nimis CC BY-SA 04
TSB 6091
Wolfgang von Brackel - CC BY-4.0
Italy, Piemonte, Val di Susa
source: Poelt J. (1958) Mitt. Bot. Staatssamml. München 2: 411-589 Die lobaten Arten der Flechtengattung Lecanora Ach. s.ampl. in der Holarktis.
Growth form: Squamulose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Commonnes-rarity: (info)
Alpine belt: absent
Subalpine belt: absent
Montane belt: very rare
Dry submediterranean belt: rare
Humid submediterranean belt: rather 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
Pier Luigi Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11227)
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11227)
2001/11/30
P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (11227)
2001/11/30
P.L. Nimis CC BY-SA 04
TSB 6091
P.L. Nimis CC BY-SA 04
TSB 6091
P.L. Nimis CC BY-SA 04
TSB 6091
Wolfgang von Brackel - CC BY-4.0
Italy, Piemonte, Val di Susa
