Stereocaulon dactylophyllum Flörke

Deutsch. Lich., 4: 13, 1819.
Synonyms: Stereocaulon coralloides Th. Fr.; Stereocaulon coralloides var. dactylophyllum (Flörke) Th. Fr.; Stereocaulon curtulum Nyl.
Distribution: N - Ven, TAA (Oset 2015, Nascimbene & al. 2022), Lomb (Rivellini & Valcuvia 1996, Gheza 2019b), Piem (Isocrono & al. 2004, Watson 2014), VA (Piervittori & Isocrono 1999).
Description: Primary thallus crustose or minutely squamulose, ephemeral, usually absent in mature individuals. Pseudopodetia firmly attached, erect, 2-4(-6) cm tall, grey-greenish when moist, greyish when dry, short-tomentose on upper surface, usually glabrous on lower surface, with a solid cartilaginous axis of parallel hyphae surrounded by a lax medulla, forming small cushions. Phyllocladia cylindrical, branched, becoming coralloid and elongate, not confluent, occasionally forming crust-like masses. Cephalodia rare, to 0.3 mm across, verrucose or granular, brownish-grey, containing Stigonema, partly embedded in the tomentum. Apothecia usually numerous at apices of small lateral branches, 1-2 mm across, the disc flat to slightly convex, brown-red when moist, blackish when dry, with a thin but distinct, paler proper margin. Proper exciple brown in outer part, colourless within; epithecium brown, K-; hymenium colourless; paraphyses simple, slightly thickened above, with a dark cap; hypothecium colourless. Asci 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 3-7-septate, hyaline, 20-36 x 3-4 µm. Main photobiont chlorococcoid. Spot tests: K+ yellow, C-, KC-, P+ orange, UV-. Chemistry: atranorin and stictic acid, sometimes with traces of norstictic acid.
Note: an arctic-alpine to boreal-montane, circumpolar lichen found on siliceous rocks, especially on large boulders, near and above treeline; probably widespread throughout the Alps.
Growth form: Fruticose

Substrata: rocks
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

Ulrich Kirschbaum
Sweden: Värmland.



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (16214)
2003/03/17



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (16214)
2003/03/17
phyllocladia


Michel David - Source:http://www.lichensmaritimes.org/index.php?task=fiche&lichen=346&lang=en
France, Morgat


Michel David - Source:http://www.lichensmaritimes.org/index.php?task=fiche&lichen=346&lang=en
France, Morgat


Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC


Alain Gerault - Source:http://www.lichensmaritimes.org/index.php?task=fiche&lichen=346&lang=en
France, Brest


Alain Gerault - Source:http://www.lichensmaritimes.org/index.php?task=fiche&lichen=346&lang=en
France, Brest


Alain Gerault - Source:http://www.lichensmaritimes.org/index.php?task=fiche&lichen=346&lang=en
France, Commana


Alain Gerault - Source:http://www.lichensmaritimes.org/index.php?task=fiche&lichen=346&lang=en
France, Commana


Einar Timdal - Source: http://nhm2.uio.no/lav/web/index.html - CC BY-NC


Ulrich Kirschbaum
Sweden: Värmland.


Ulrich Kirschbaum
Sweden: Värmland.


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


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 S. spissum