Lathagrium fuscovirens (With.) Otálora, P.M. Jørg. & Wedin

Fungal Divers. (online version), 64: 287, 2013. Basionym: Lichen fuscovirens With. - Bot. Arrang. Veget. Gr. Brit.: 717, 1776.
Synonyms: Collema furvum (Ach.) DC.; Collema furvum var. pustulosissimum Harm.; Collema fuscovirens (With.) J.R. Laundon; Collema rupestre var. furvum (Ach.) Rabenh.; Collema stillicidiorum Harm.; Collema subgranosum Harm.; Collema tuniforme (Ach.) Ach.; Lichen furvus Ach.; Lichen tunaeformis Ach.; Parmelia furva (Ach.) Ach.
Distribution: N - VG (Castello 2002, Martellos & Castello 2004), Frl (Tretiach & Molaro 2007), Ven (Nascimbene & Caniglia 1997, Caniglia & al. 1999, Nascimbene & Marini 2007), TAA, Lomb, Piem (Isocrono & al. 2004, Favero-Longo & al. 2006b), VA (Piervittori & Isocrono 1999), Emil (Fariselli & al. 2020), Lig (Giordani & al. 2016). C - Tosc (Tretiach & Nimis 1994, Benesperi 2011), Marc (Nimis & Tretiach 1999), Umb (Nimis & Tretiach 1999, Ravera & al. 2006, Panfili 2007), Laz, Abr (Nimis & Tretiach 1999, Caporale & al. 2016, Gheza & al. 2021), Mol (Nimis & Tretiach 1999, Caporale & al. 2008, Genovesi & Ravera 2014), Sar. S - Camp (Aprile & al. 2003b, Nimis & Tretiach 2004), Pugl (Nimis & Tretiach 1999), Bas (Nimis & Tretiach 1999, Potenza 2006), Cal (Puntillo 1996), Si (Nimis & al. 1994, 1996b, Grillo 1998, Grillo & Caniglia 2004, Liistro & Cataldo 2011).
Description: Thallus foliose, homoiomerous, gelatinous when wet, 3-5 cm wide, deeply and broadly lobed. Lobes 2-6 mm wide, 0.1-0.25 mm thick, often repeatedly branched, broadly canaliculated, rounded at tips, the margins not swollen, coarsely undulate. Upper surface dark olive-green to black, paler and subtransparent when moist, often somehow pustulate, with dense, laminal, mostly globular isidia (up to 0.3 mm broad). Lower surface paler, with bundles of white hapters. Upper and lower cortex absent. Apothecia not always present, sessile, 0.5-1.5(-2) mm across, with a plane to convex, red-brown disc and a thick, entire, smooth or isidiate thalline margin. True exciple euparaplectenchymatous; hymenium colourless, 85-130 µm tall. Asci 8-spored, narrowly clavate, the apex thick, with a I+ blue apical dome and a I+ blue annulus projecting downwardly. Ascospores submuriform or muriform, often with 3 transversal and 1 longitudinal septa, hyaline, ellipsoid to subglobose, 15-24(-28) x 6.5-13(-15) µm Pycnidia: laminal or marginal, immersed or semi-immersed, pale. Conidia bacilliform or with slightly swollen ends, 4.5-6 x 1.5 µm. Photobiont cyanobacterial (Nostoc), in long chains. Spot tests: all negative. Chemistry: without lichen substances.
Note: a widespread holarctic lichen found on calciferous rocks, more rarely on epilithic mosses, in moderately sheltered sites with some water seepage after rain, with a wide altitudinal range; one of the most common species of the genus in Italy.
Growth form: Foliose, broad lobed
Substrata: rocks
Photobiont: cyanobacteria, filamentous (e.g. Nostoc, Scytonema)
Reproductive strategy: mainly asexual, by isidia, or isidia-like structures (e.g. schizidia)
On otherwise dry surfaces with short periods of water seepage after rain

Commonnes-rarity: (info)

Alpine belt: very rare
Subalpine belt: rather common
Oromediterranean belt: very rare
Montane belt: common
Submediterranean belt: common
Padanian area: very rare
Humid submediterranean belt: common
Humid mediterranean belt: rather common
Dry mediterranean belt: rare

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


Felix Schumm - CC BY-SA 4.0
[16577], Germany, Baden-Württemberg, Kreis Esslingen, Neuffen, an Mauern der Ruine Hohenneuffen, 48.55492° N, 9.39356° E, ca. 710 m. Leg. et det. Schumm 12.08.2010.


Triin Aimla; Owner: University of Tartu



Andrea Moro; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Trieste, Trieste, Conconello
14/02/2017



Andrea Moro; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Trieste, Trieste, Conconello
14/02/2017



Andrea Moro; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Trieste, Trieste, Conconello
14/02/2017


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



Felix Schumm - CC BY-SA 4.0
[16577], Germany, Baden-Württemberg, Kreis Esslingen, Neuffen, an Mauern der Ruine Hohenneuffen, 48.55492° N, 9.39356° E, ca. 710 m. Leg. et det. Schumm 12.08.2010.



Felix Schumm - CC BY-SA 4.0
[16577], Germany, Baden-Württemberg, Kreis Esslingen, Neuffen, an Mauern der Ruine Hohenneuffen, 48.55492° N, 9.39356° E, ca. 710 m. Leg. et det. Schumm 12.08.2010.



Felix Schumm - CC BY-SA 4.0
[16577], Germany, Baden-Württemberg, Kreis Esslingen, Neuffen, an Mauern der Ruine Hohenneuffen, 48.55492° N, 9.39356° E, ca. 710 m. Leg. et det. Schumm 12.08.2010.



Felix Schumm – CC BY-SA 4.0
[16577], Germany, Baden-Württemberg, Kreis Esslingen, Neuffen, an Mauern der Ruine Hohenneuffen, 48.55492° N, 9.39356° E, ca. 710 m. Leg. et det. Schumm 12.08.2010


Leif Stridvall
Courtesy: Anita Stridvall -Source: http://www.stridvall.se/lichens/gallery/


Leif Stridvall
Courtesy: Anita Stridvall -Source: http://www.stridvall.se/lichens/gallery/


Leif Stridvall
Courtesy: Anita Stridvall -Source: http://www.stridvall.se/lichens/gallery/


Leif Stridvall
Courtesy: Anita Stridvall -Source: http://www.stridvall.se/lichens/gallery/


Leif Stridvall
Courtesy: Anita Stridvall -Source: http://www.stridvall.se/lichens/gallery/


Leif Stridvall
Courtesy: Anita Stridvall -Source: http://www.stridvall.se/lichens/gallery/


Leif Stridvall
Courtesy: Anita Stridvall -Source: http://www.stridvall.se/lichens/gallery/


Leif Stridvall
Courtesy: Anita Stridvall -Source: http://www.stridvall.se/lichens/gallery/


Leif Stridvall
Courtesy: Anita Stridvall -Source: http://www.stridvall.se/lichens/gallery/


Leif Stridvall
Courtesy: Anita Stridvall -Source: http://www.stridvall.se/lichens/gallery/


Leif Stridvall
Courtesy: Anita Stridvall -Source: http://www.stridvall.se/lichens/gallery/


Leif Stridvall
Courtesy: Anita Stridvall -Source: http://www.stridvall.se/lichens/gallery/


Leif Stridvall
Courtesy: Anita Stridvall -Source: http://www.stridvall.se/lichens/gallery/


Degelius G. 1954. The lichen genus Collema in Europe: Morphology, Taxonomy, Ecology. Symbolae Bot. Upsal. 13, 2: 1-499.



P.L. Nimis CC BY-SA 04
TSB 31999