Cetraria sepincola (Ehrh.) Ach.

Meth. Lich.: 297, 1803. Basionym: Lichen sepincola Ehrh. - Hannover Mag., 21: 203, 1783.
Synonyms: Cetraria scutata (Wulfen) Poetsch non auct.; Tuckermannopsis sepincola (Ehrh.) Hale
Distribution: N - Frl, Ven (Tretiach 1993), TAA (Caniglia & al. 2002, Nascimbene & al. 2006e, 2007b, 2009, Nimis & al. 2015), Lomb, Piem (Isocrono & al. 2004), Lig.
Description: Thallus foliose to subfruticose, almost monophyllous, often more thalli appearing together in colonies of small lobes radiating from the substrate. Lobes olivaceous to dark brown, wrinkled, rather glossy, flattened, rounded at apex, up to 10 mm long (usually less), 2-3 mm broad, smooth to wrinked; lower surface whitish or pale brown, with scattered, simple or slightly branched rhizines. Upper and lower cortex prosoplectenchymatous; medulla white, rather loose. Apothecia very numerous and often obscuring the lobes, lecanorine, submarginal to terminal, up to 3.5 mm across, with a reddish brown, glossy disc and a thick, smooth to crenulate margin often bearing scattered pseudocyphellae. Epithecium brown; hymenium and hypothecium colourless; paraphyses conglutinate. Asci 8-spored, thick-walled, the apex I+ blue with a wide, divergent axial body, Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid, 6-10 x (3.5-)5-7(-10) μm. Pycnidia black, mostly marginal, slightly projecting. Conidia dumbbell-shaped (enlarged at both ends), 5-7 x c. 1 μm. Photobiont chlorococcoid. Spot tests: cortex and medulla K-, C-, KC-, P-, UV-. Chemistry: medulla with lichesterinic and protolichesterinic acid.
Note: a subarctic-subalpine, circumpolar species found near treeline on small twigs of shrubs and trees, especially Betula, Alnus viridis, Rhododendron ferrugineum, mostly near the ground and in areas with siliceous substrata; confined to the Alps in Italy and very rare in dry areas.
Growth form: Fruticose

Substrata: bark
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: rather 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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Leif Stridvall http://www.stridvall.se/la/galleries.php


Leif Stridvall



Pier Luigi Nimis - CC BY-SA 4.0
TSB 37222



Pier Luigi Nimis - CC BY-SA 4.0
TSB 37222



Pier Luigi Nimis - CC BY-SA 4.0
TSB 37222


P.L. nimis CC BY-SA 4.0
TSB 33734



Pier Luigi Nimis - CC BY-SA 4.0
TSB 43817


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