Porpidia tuberculosa (Sm.) Hertel & Knoph

in Hertel, Beih. Nova Hedwigia, 79: 438, 1984. Basionym: Spiloma tuberculosum Sm. in Smith & Sowerby - Engl. Bot., 36, tab. 2556, 1814.
Synonyms: Huilia tuberculosa (Sm.) P. James; Lecidea confluens var. tumida (A. Massal.) A. Massal.; Lecidea contigua f. tumida (A. Massal.) Arnold; Lecidea macrocarpa var. tumida (A. Massal.) Stein; Lecidea platycarpa var. tumida (A. Massal.) Stein; Lecidea sorediza Nyl.; Lecidea tumida A. Massal.
Distribution: N - Frl (Tretiach & Hafellner 2000), Ven (Lazzarin 2000b), TAA (Lang 2009, Hertel & Schuhwerk 2010, Nascimbene & al. 2022), Lomb, Piem, VA (Piervittori & Isocrono 1999), Emil (Tretiach & al. 2008, Fariselli & al. 2020), Lig (Brunialti & al. 1999). C - Tosc, Sar.
Description: Thallus crustose, episubstratic, up to 1 mm thick, whitish, pale to dark grey, blue-grey or partly rust-red, continuous to cracked-areolate, sometimes delimited by a thin, dark prothalline line, sorediate. Soralia scattered, rounded to irregular, 0.1-1 mm wide, at first discrete, finally often confluent, grey, often with a bluish tinge, when young often delimited by a thin, raised thalline rim; soredia farinose to granular. Medulla white, I+ violet-blue. Apothecia rare, lecideine, black, rounded to slightly irregular, at first innate, then sessile, 0.8-2(-3) mm across, with a flat to slightly convex, often bluish-pruinose and sometimes tuberculate disc, and a slightly raised, usually epruinose, shiny proper margin. Proper exciple dark throughout, the hyphae 2.5-4 μm thick; epithecium olive-brown, N+ orange red, K-; hymenium colourless, 70-110(-135) μm high; paraphyses coherent, branched and anastomosing, slightly swollen at tips; hypothecium dark brown. Asci 8-spored, elongate-clavate, with a thin, outer amyloid layer and a thickened tholus penetrated by a pore, the sides of which stain I/KI+ deep blue, Porpidia-type. Ascospores 1-celled, hyaline, ellipsoid, (9-)14-20(-25) x (4-)7-10(-13) μm. Photobiont chlorococcoid. Spot tests: medulla and soralia K-, C-, KC-, P-. Chemistry: confluentic acid (major), 2’-O-methylmicrophillinic and 2’-O-methylperlatolic acids (minor), very rarely with additional stictic or norstictic acids (in which case the soralia react K+ yellow and P+ orange).
Note: on steeply inclined surfaces of siliceous rocks, or in woodlands, mostly near the ground. Earlier records from Marche, Campania and Sicily (see Nimis 1993: 571), being dubious, are not accepted here.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)

Commonnes-rarity: (info)

Alpine belt: absent
Subalpine belt: extremely rare
Oromediterranean belt: extremely rare
Montane belt: very rare
Submediterranean belt: extremely rare
Padanian area: absent
Humid submediterranean belt: extremely rare
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


P.L. Nimis CC BY-SA 04
TSB 16062



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (16062)
2001/11/29


Leif Stridvall - Source: http://www.stridvall.se/la/galleries.php



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (16062)
2001/11/29


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Hôpital-Camfrout


Joël Querellou - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Hôpital-Camfrout


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Hôpital-Camfrout


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Hôpital-Camfrout


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Hôpital-Camfrout


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Commana


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Commana


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Commana


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Corse, Zonza


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Corse, Zonza


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Corse, Zonza


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Le Fret


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Le Fret


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Le Fret


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Poullaouen


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Poullaouen


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Poullaouen


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=417&lang=en
France, Poullaouen


Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe; Germany: Hesse.


Ulrich Kirschbaum CC BY-SA 4.0 - Source: https://www.thm.de/lse/ulrich-kirschbaum/flechtenbilder
Central Europe; Germany: Hesse.