Lecania subfuscula (Nyl.) S. Ekman

Opera Bot., 127: 134, 1966. Basionym: Lecidea subfuscula Nyl. - Flora, 48: 604, 1865.
Synonyms: Bacidia circumpallens (Nyl.) Arnold; Bacidia subfuscula (Nyl.) Th. Fr.; Lecidea circumpallens Nyl.
Distribution: N - Ven (Nascimbene 2002, 2003b, Tomaselli & al. 2006, Nascimbene 2008), TAA (Herb. Nascimbene 7779).
Description: Thallus crustose, very variable, from immersed or filmy to (usually) granular-warted, greenish white to pale brown. Apothecia crowded into clusters, 0.2-0.6 mm across, with an initially flat, but soon becoming convex, grey-brown pinkish brown to black disc, and a thin, usually paler proper margin. Proper exciple brown and K+ purple along the upper outer edge and at the top, otherwise colourless, of radially arranged, cellular hyphae; epithecium colourless to olivaceous grey or violet-brown, N+ red, K+ purple when strongly pigmented; hymenium colourless or brownish in upper part, 40-50(-65) μm high; paraphyses rather lax, 1.5-2 µm thick, the apical cells swollen, up to 5 µm wide, usually brown-pigmented; hypothecium colourless or yellowish, the pigmented parts K+ pale yellow. Asci 8-spored, narrowly clavate, with a K/I+ blue tholus and a central non-amyloid area, Bacidia-type. Ascospores 3(-5)-septate, hyaline, bacilliform to narrowly fusiform, 14-28 x 2-3 µm. Pycnidia immersed, with a colourless wall. Conidia partly curved, 30-55 x 1-1.5 µm. Photobiont chlorococcoid. Spot tests: thallus K-, C-, KC-, P-, UV-. Chemistry: without lichen substances.
Note: on more or less calciferous soil, terricolous mosses and plant debris, rarely on calciferous rocks, usually below the montane belt. The specimen from Veneto corresponds well to the description (vidi!).
Growth form: Crustose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)

Commonnes-rarity: (info)

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


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