Stereocaulon incrustatum Flörke

Deutsch. Lich., 4: 12, 1819.
Synonyms: Stereocaulon abduanum Anzi; Stereocaulon incrustatum f. gracile Frey; Stereocaulon incrustatum var. abduanum (Anzi) Frey
Distribution: N - Ven, TAA, Lomb (Rivellini & Valcuvia 1996), Piem (Watson 2014, Oset 2015, Ravera & al. 2023), Lig.
Description: Primary thallus crustose-granulose, ephemeral, usually absent in mature individuals, secondary thallus fruticose, forming thick loose tufts. Pseudopodetia prostrate to ascending at the periphery, erect in the centre, 1-3(-5) cm tall, 0.8-1.2 mm thick, terete, densely white- to ash-grey-tomentose, with a solid cartilaginous axis of parallel hyphae surrounded by a lax medulla. Phyllocladia irregularly distributed, thicker at the apices, whitish to bluish grey, verruciform and very small, often hidden by the tomentum, <0.2 mm in diam. Cephalodia sparse, up to 2 mm across but often smaller, grey-green to dark brown, globose, localised in the parts free from phyllocladia, often covered by the tomentum, containing Stigonema. Apothecia rare, 1-2 mm across, with a dark brown, convex disc and an indistinct, thin proper margin. Proper exciple brown in outer part, colourless within; epithecium brown, K-; hymenium colourless, (50-)60-65 µm high; paraphyses mostly simple, 1-1.5 µm thick, the apical cells 2-3.5 µm wide, with a dark cap; hypothecium colourless. Asci (4-)6(-8)-spored, cylindrical-clavate, with a K/I+ blue outer layer and apical dome, and a central, K/I+ darker blue tube, Porpidia-type. Ascospores septate, hyaline, fusiform, 35-44 x 2.5-3 µm. Pycnidia dark, immersed. Conidia 1-celled, hyaline, bacilliform, 4.5-6(-7) x 0.8-1.2 µm. Main photobiont chlorococcoid. Spot tests: K+ yellow, C-, KC- or KC+ violet (reaction often difficult to observe macroscopically, best evident on acetone extract on filter paper!), P- or P+ slowly pale yellow, UV+ blue-white. Chemistry: atranorin and variable amounts of lobaric acid.
Note: an arctic-alpine to boreal-montane, circumpolar lichen found on mineral, nutrient-poor soil, in open Pinus-woodlands, in the vicinity of glaciers and by rivers; restricted to the Alps in Italy, with optimum near treeline.
Growth form: Fruticose

Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia (primary); cyanobacteria, filamentous (e.g. Nostoc, Scytonema) (secundary, e.g. in cephalodia)
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: very rare
Subalpine belt: 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:

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Solar irradiation:

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Aridity:

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Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model
Herbarium samples
Index Fungorum GBIF


Felix Schumm - CC BY-SA 4.0
[VZ1340], Bohemoslovacia. Slovacia, montes Slovenské rudohorie: In valle rivi inter Uhorná et Smolník, 600 m. Ad scorias vetustas. Leg. A. V zda, 15.06.1975, det. A. V zda. Ex A. V ZDA: LICHENES SELECTI EXSICCATI NR. 1340.



Felix Schumm - CC BY-SA 4.0
[VZ1282], Bohemoslovacia. Slovacia: Carpates, montes Slovenské Rudohorie: Mníšek, in valle rivi Smolník prope Smolnická pila, 500 m. Ad scorias vetustas. Leg. A. Kiszely & A. V zda, 21.07.1974, det. M.I. Lamb (Annot.: Pro Monogr. Stereo. Univ. sumptum, no. 10177). Ex A. V ZDA: LICHENES SELECTI EXSICCATI NR. 1289.



Felix Schumm - CC BY-SA 4.0
[VZ1282], Bohemoslovacia. Slovacia: Carpates, montes Slovenské Rudohorie: Mníšek, in valle rivi Smolník prope Smolnická pila, 500 m. Ad scorias vetustas. Leg. A. Kiszely & A. V zda, 21.07.1974, det. M.I. Lamb (Annot.: Pro Monogr. Stereo. Univ. sumptum, no. 10177). Ex A. V ZDA: LICHENES SELECTI EXSICCATI NR. 1289.



Felix Schumm - CC BY-SA 4.0
[VZ1340], Bohemoslovacia. Slovacia, montes Slovenské rudohorie: In valle rivi inter Uhorná et Smolník, 600 m. Ad scorias vetustas. Leg. A. V zda, 15.06.1975, det. A. V zda. Ex A. V ZDA: LICHENES SELECTI EXSICCATI NR. 1340.



Felix Schumm - CC BY-SA 4.0
[VZ1340], Bohemoslovacia. Slovacia, montes Slovenské rudohorie: In valle rivi inter Uhorná et Smolník, 600 m. Ad scorias vetustas. Leg. A. V zda, 15.06.1975, det. A. V zda. Ex A. V ZDA: LICHENES SELECTI EXSICCATI NR. 1340.



P.L. Nimis CC BY-SA 04
TSB 33918



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (25610)
2003/03/06



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (25610)
2003/03/06
phyllocladia



Pier Luigi Nimis CC BY-SA 4.0
TSB 33918



Pier Luigi Nimis CC BY-SA 4.0
TSB 33918



Pier Luigi Nimis CC BY-SA 4.0
TSB 33918



Pier Luigi Nimis CC BY-SA 4.0
TSB 33918



Pier Luigi Nimis CC BY-SA 4.0
TSB 33918



Pier Luigi Nimis CC BY-SA 4.0
TSB 33918



Pier Luigi Nimis CC BY-SA 4.0
TSB 33918


Triin Aimla; Owner: University of Tartu


Frey E. 1933. Cladoniaceae (unter Ausschluß ded Gattung Cladonia) und Umbilicariaceae. In: Rabenhrst’s Kryptogamenflora von Deutschland, Österreich und der Schweiz. 15: 1-208.
as var. abduanum


Frey E. 1933. Cladoniaceae (unter Ausschluß ded Gattung Cladonia) und Umbilicariaceae. In: Rabenhrst’s Kryptogamenflora von Deutschland, Österreich und der Schweiz. 15: 1-208.