Lecanora paepalea Ach.

Syn. Lich.: 165, 1814.
Synonyms: Lecanora savonensis B. de Lesd.
Distribution: N - Lig.
Description: Thallus crustose, very thin, continuous or finely rimose, whitish, pale grey or very pale brown, mostly indistinct. Apothecia cryptolecanorine, sessile and constricted at base, usually dispersed, 0.2-0.8 mm across, with a reddish brown to to finally red brown-black, at first concave, then persistently flat, initially sometimes pruinose disc, and a concolorous, flexuose, entire margin containing algae. Epithecium pale reddish brown, granular, K-; hymenium colourless, 50-60 µm high; paraphyses mostly simple, coherent, thin; hypothecium colourless. Asci 8-spored, clavate, very thin-walled, with a K/I+ blue, tall tholus penetrated by a faintly amyloid apical cushion, the wall K/I-, surrounded by a blue outer layer, Lecanora-type. Ascospores 1-celled, hyaline, oblong-ellipsoid, rounded at apices, 6-9 x 4-6 µm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: a poorly known species of more or less calciferous rocks. An earlier record from Puglia (see Nimis 1993: 360), being dubious, is not accepted here.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Poorly known taxon in need of further study

Commonnes-rarity: (info)

Alpine belt: very rare
Subalpine belt: very rare
Oromediterranean belt: absent
Montane belt: very rare
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