Umbilicaria cylindrica var. delisei Nyl.

Despr. ex Nyl., Lichenes Scand.: 117, 1861.
Synonyms: Gyrophora cylindrica var. delisei (Nyl.) Th. Fr.; Umbilicaria canescens (Dombr.) Dombr.; Umbilicaria delisei (Nyl.) Kremp.
Distribution: N - TAA (Nascimbene & al. 2022), Piem (Isocrono & al. 2006, 2006b), VA (Piervittori & Isocrono 1999, Matteucci & al. 2015c).
Description: Thallus foliose-umbilicate, heteromerous, dorsiventral, usually monophyllous, 6-10 cm wide, the lobe margins almost bare, only young lobes with a few flat, densely branched black cilia. Upper surface pale to dark grey, sometimes tinged brown, dull, slightly wrinkled or almost even, sometimes with a few folds and ridges around the umbilicus, giving way to a reticulate pattern. Lower surface grey-white, distinctly pink towards the umbilicus, even, smooth, the area around the umbilicus naked, the rest with moderately numerous thin, long, cylindrical, pale, simple rhizinomorphs; thalloconidia absent. Upper cortex 10-20 µm thick; medulla white, 3-layered, the upper and lower layers loose, with an arachnoid plectenchyma, the layer inbetween with a compact plectenchyma; lower cortex 10-20 µm thick, scleroplectenchymatous. Apothecia numerous, black, gyrodisc, markedly stipitate, to 2-5 mm across, convex with few deep gyri. Epi- and hypothecium dark; hymenium colourless. Asci 8-spored, clavate, thick-walled, with an amyloid apical dome, Umbilicaria-type. Ascospores 1-celled, hyaline, ellipsoid, 8-15 x 3–9 µm. Pycnidia numerous, immersed, bottle-shaped, with a brown wall, and a dark brown ostiole. Conidia c. 3-4 x 0.8 µm. Photobiont chlorococcoid. Spot tests: medulla K- or K+ yellow turning red, C-, KC- or KC+ faintly red, P- or P+ orange. Chemistry: medulla with variable amounts of norstictic acid and sometimes with very low amounts of gyrophoric and lecanoric acids.
Note: more hygrophytic than the typical variety, and often found in sheltered situations, such as in niches of the rock.
Growth form: Foliose, umbilicate
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

Alpine belt: rare
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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Predictive model
Herbarium samples
Index Fungorum GBIF

Giancarlo Medici; Owner: Giancarlo Medici
Valle d' Aosta.
Herbarium: Forum Natura Mediterraneo
2010



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (16532)
2001/12/05
lower surface


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