Rhizocarpon lecanorinum Anders

Hedwigia, 64: 261, 1923.
Synonyms: Diplotomma geographicum f. lecanorinum (Anders) Jatta; Lecidea atrovirens var. lecanora Flörke; Rhizocarpon atrovirens auct. p.p.; Rhizocarpon geographicum var. lecanorum (Flörke) A. Massal.; Rhizocarpon lecanora (Flörke) Lynge comb. inval.
Distribution: N - VG, Frl (TSB 3828), Ven, TAA (Nascimbene & al. 2022), Lomb, Piem (Favero-Longo & al. 2006b), VA (Piervittori & Isocrono 1999, Matteucci & al. 2008c), Lig (Ravera & al. 2022). C - Marc (Nimis & Tretiach 1999, Umb (Panfili 2000, 2003, Ravera & al. 2006), Laz, Abr (Nimis & Tretiach 1999), Mol (Caporale & al. 2008), Sar. S - Camp (Garofalo & al. 1999, Nimis & Tretiach 2004), Pugl (Nimis & Tretiach 1999), Bas (Nimis & Tretiach 1999), Cal (Puntillo 1996, Puntillo & Puntillo 2004, Scarciglia & al. 2012, 2012b), Si (Brackel 2008b, 2008c).
Description: Thallus crustose, areolate, greenish yellow to grey-green, forming patches to 5-6 cm across, several thalli often merging to cover larger surfaces. Areoles 0.6-2 mm diam., dispersed to contiguous, smooth, matt, sometimes flat but most often convex to round, partially or totally enclosing apothecia, but typically horseshoe-shaped. Cortex 25-50 µm thick; medulla white, I+ blue. Apothecia lecideine, 0.5-1.2 mm across, one per areole (very seldom several), more or less circular, flat to concave, with a black, not pruinose disc and a thin, often finally excluded, black proper margin. Cortex cells of excipulum brownish, K+ brown-red; epithecium thin, dirty green, K+ brighter green; hymenium greenish to colourless, 160-200 µm thick; paraphysoids strongly conglutinate, richly branched and anastomosing, sometimes slightly capitate; hypothecium brown, K-. Asci 8-spored, clavate, fissitunicate, with a well-developed tholus, lacking an ocular chamber, Rhizocarpon-type. Ascospores muriform, blackish brown, with 15-38 cells in section, (27-)34-45(-57) x (11-)15-20(-24) µm. Photobiont: chlorococcoid. Spot tests: medulla K+ yellow, C-, KC-, P+ brick red. Chemistry: cortex with rhizocarpic acid, medulla with stictic acid.
Note: a temperate to boreal-montane, circumpolar lichen, most common on stonewalls, dust-impregnated siliceous boulders and roofing tiles, but also found in natural habitats, e.g. with Umbilicaria deusta.
Growth form: Crustose
Substrata: rocks
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

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

Walter Obermayer CC BY-SA 4.0 - Source: Lichens of Noricum - http://lichens-of-noricum.uni-graz.at/



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (35726)
2003/01/22



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (34631)
2002/01/22



Domenico Puntillo; Owner: Domenico Puntillo
Italy



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (13925)
2001/12/01



Pier Luigi Nimis - CC BY-SA 4.0
TSB 38641



Pier Luigi Nimis - CC BY-SA 4.0
TSB 38641


Mark Rahill - CC BY-SA 4.0
USA


Mark Rahill - CC BY-SA 4.0


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Rhizocarpon_lecanorinum.htm
France, 7/7/2013 - Capanello, lac de Bastani-Monte-Rinosu - Corse


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Rhizocarpon_lecanorinum.htm
France, 7/7/2013 - Capanello, lac de Bastani-Monte-Rinosu - Corse


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Rhizocarpon_lecanorinum.htm
France, 7/7/2013 - Capanello, lac de Bastani-Monte-Rinosu - Corse


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Rhizocarpon_lecanorinum.htm
France, 7/7/2013 - Capanello, lac de Bastani-Monte-Rinosu - Corse


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=488&lang=en
France, Plougonven


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=488&lang=en
France, Plougonven


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=488&lang=en
France, Roc'h an Daol


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=488&lang=en
France, Roc'h an Daol


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=488&lang=en
France, Roc'h an Daol


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=488&lang=en
France, Roc'h an Daol


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=488&lang=en
France, Roc'h an Daol


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=488&lang=en
France, Ardennes


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=488&lang=en
France, Ardennes


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=488&lang=en
France, Ardennes


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=488&lang=en
France, Ardennes


Ulrich Kirschbaum
Central Europe; Germany; Hesse: Rhoen Mountains. on siliceous rocks


Ulrich Kirschbaum
Central Europe; Germany; Hesse: Rhoen Mountains. on siliceous rocks



Felix Schumm - CC BY-SA 4.0
[2036], Deutschland, Niedersachsen, Nordharz. Auf plattigem Kahleberg- Sandstein von der Steinbruch-Blockhalde am Westhang des Rammelsberges bei Goslar, ca. 425 m. Leg et det. Hans Ullrich, 08.1970. EX HERBARIO HANS ULLRICH.



Felix Schumm - CC BY-SA 4.0
[2036], Deutschland, Niedersachsen, Nordharz. Auf plattigem Kahleberg- Sandstein von der Steinbruch-Blockhalde am Westhang des Rammelsberges bei Goslar, ca. 425 m. Leg et det. Hans Ullrich, 08.1970. EX HERBARIO HANS ULLRICH.



Felix Schumm - CC BY-SA 4.0
[2922], Mitteldeutschland, Bez. Nordhessen: flächenfüllend an lichtoffenen, glatten Kulmflächen schwach geneigter dunkler Schieferplatten in der Initialphase des Xanthoparmelietum conspersae Klem., 350 m, S, pH 6,3. Waldsaumlücken am Südhang der Ederhöhen unter dem Dicken Kopf unweit Gellershausen. Leg et det. G. Follmann, 05.1972, conf. Tassilo Feuerer 02.1982. EX G. FOLLMANN: LICHENES EXSICCATI SELECTI A MUSEO HISTORIAE NATURSALIS CASSELENSI EDITI NR. 377.



Felix Schumm - CC BY-SA 4.0
[2922], Mitteldeutschland, Bez. Nordhessen: flächenfüllend an lichtoffenen, glatten Kulmflächen schwach geneigter dunkler Schieferplatten in der Initialphase des Xanthoparmelietum conspersae Klem., 350 m, S, pH 6,3. Waldsaumlücken am Südhang der Ederhöhen unter dem Dicken Kopf unweit Gellershausen. Leg et det. G. Follmann, 05.1972, conf. Tassilo Feuerer 02.1982. EX G. FOLLMANN: LICHENES EXSICCATI SELECTI A MUSEO HISTORIAE NATURSALIS CASSELENSI EDITI NR. 377.



Felix Schumm - CC BY-SA 4.0
[4122], Germany, Baden-Württemberg, Schwarzwald, nordwestlich von Schwenningen, auf dem Brend, ca. 1150 m, auf Triberger Granit, TK: 7914. Leg. F. Schumm, 06.08.1994, det. F. Schumm. - Sporen zu 8/Ascus, schwarz, muriform, groß; Epihymenium K-; Mark J+ blau.



Felix Schumm - CC BY-SA 4.0
[4122], Germany, Baden-Württemberg, Schwarzwald, nordwestlich von Schwenningen, auf dem Brend, ca. 1150 m, auf Triberger Granit, TK: 7914. Leg. F. Schumm, 06.08.1994, det. F. Schumm. - Sporen zu 8/Ascus, schwarz, muriform, groß; Epihymenium K-; Mark J+ blau.



Felix Schumm - CC BY-SA 4.0
[4122], Germany, Baden-Württemberg, Schwarzwald, nordwestlich von Schwenningen, auf dem Brend, ca. 1150 m, auf Triberger Granit, TK: 7914. Leg. F. Schumm, 06.08.1994, det. F. Schumm. - Sporen zu 8/Ascus, schwarz, muriform, groß; Epihymenium K-; Mark J+ blau.



Felix Schumm - CC BY-SA 4.0
[4122], Germany, Baden-Württemberg, Schwarzwald, nordwestlich von Schwenningen, auf dem Brend, ca. 1150 m, auf Triberger Granit, TK: 7914. Leg. F. Schumm, 06.08.1994, det. F. Schumm. - Sporen zu 8/Ascus, schwarz, muriform, groß; Epihymenium K-; Mark J+ blau.



Felix Schumm - CC BY-SA 4.0
[4122], Germany, Baden-Württemberg, Schwarzwald, nordwestlich von Schwenningen, auf dem Brend, ca. 1150 m, auf Triberger Granit, TK: 7914. Leg. F. Schumm, 06.08.1994, det. F. Schumm. - Sporen zu 8/Ascus, schwarz, muriform, groß; Epihymenium K-; Mark J+ blau.



Felix Schumm - CC BY-SA 4.0
[4122], Germany, Baden-Württemberg, Schwarzwald, nordwestlich von Schwenningen, auf dem Brend, ca. 1150 m, auf Triberger Granit, TK: 7914. Leg. F. Schumm, 06.08.1994, det. F. Schumm. - Sporen zu 8/Ascus, schwarz, muriform, groß; Epihymenium K-; Mark J+ blau.



Felix Schumm - CC BY-SA 4.0
[4122], Germany, Baden-Württemberg, Schwarzwald, nordwestlich von Schwenningen, auf dem Brend, ca. 1150 m, auf Triberger Granit, TK: 7914. Leg. F. Schumm, 06.08.1994, det. F. Schumm. - Sporen zu 8/Ascus, schwarz, muriform, groß; Epihymenium K-; Mark J+ blau.