Cladonia macilenta Hoffm.

Deutschl. Fl., 2: 126, 1796, nom. cons.
Synonyms: Cladonia bacillaris (Ach.) Gent.; Cladonia macilenta var. squamigera Vain.
Distribution: N - VG (TSB 12227), Frl (Tretiach & Hafellner 2000), Ven (Nascimbene & Caniglia 2000b, 2002c, 2003c, Nascimbene & al. 2006e, Nascimbene 2008c), TAA (Caniglia & al. 2002, Nascimbene & Caniglia 2002c, Nascimbene & al. 2005, 2006, 2006b, 2006e, 2007b, 2008b, 2008c, 2014, 2022, Nascimbene 2006c, 2014, Nimis & al. 2015), Lomb (Rivellini & Valcuvia 1996, Gheza 2018, 2019, 2019b, Gheza & al. 2022), Piem (Morisi & Sereno 1995, Piervittori 2003, Isocrono & al. 2004, 2006, Isocrono & Piervittori 2008, Matteucci & al. 2010, Gheza & Nascimbene 2024), VA (Piervittori & Isocrono 1999), Emil (Nimis & al. 1996, Tretiach & al. 2008, Fariselli & al. 2020), Lig (Gheza & al. 2020). C - Tosc (Tretiach & Nimis 1994, Loppi & De Dominicis 1996b, Loppi & al. 1997b, 2004c, Pasquinelli & al. 2009, Brunialti & Frati 2010, Benesperi 2011), Marc (Nimis & Tretiach 1999), Umb (Ravera 1998, Ravera & al. 2006), Laz (Merlo 2004), Abr (Nimis & Tretiach 1999), Mol (Paoli & al. 2015), Sar (Rizzi & al. 2011, Di Nuzzo & al. 2022). S - Camp (Ricciardi & al. 2000, Nimis & Tretiach 2004), Cal (Puntillo 1996), Si.
Description: Primary thallus squamulose, usually persistent, the squamules divided, very small 1-2 mm long and wide, grey-green above, white beneath, sometimes sorediate at margins. Podetia bacilliform, often slightly broadening below the apothecium and becoming club-like, hollow inside, greenish grey to whitish in the parts which have lost the soredia, 1-3 cm tall, to 1.5 mm thick at base, simple or very rarely sparingly branched in upper part, without cups, corticate and sometimes microsquamulose only at base, farinose-sorediate, the soredia 20-50 μm in diam. Apothecia rather frequent, scarlet red, terminal, up to 2 mm diam. (usually smaller). Asci 8-spored, clavate, thickened at apex, with a K/I+ blue tholus and a K/I+ strongly blue outer gelatinous sheath, Cladonia-type. Ascospores 1-celled, hyaline, ellipsoid. Pycnidia scarlet red, semi-immersed in the tips of podetia or on the surface or margins of the primary squamules, with a red jelly. Conidia hyaline, curved. Photobiont chlorococcoid. Spot tests and chemistry: two chemotypes (both of them C-, UV-): 1) K+ yellow, P+ yellow (thamnolic, barbatic and didymic acids, and porphyirilic acid in the apothecia, rarely with additional usnic acid), 2) K-, P- (barbatic and didymic acids).
Note: a cool-temperate to boreal-montane, circumpolar lichen found on different organic substrata such as rotting wood, bark (mostly on basal parts of trunks) and more rarely on acid soil rich in humus; in Southern Italy it is most frequent in old Castanea-stands, on stumps.
Growth form: Fruticose

Substrata: bark, lignum, soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual

Commonnes-rarity: (info)

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

pH of the substrata:

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(info)

Solar irradiation:

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(info)

Aridity:

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(info)

Eutrophication:

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Poleotolerance:

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Altitudinal distribution:

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Predictive model
Herbarium samples
Index Fungorum GBIF

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



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (9839)
2001/12/04
detail of apothecia


Triin Aimla; Owner: University of Tartu
originally as Cladonia bacillaris


Triin Aimla; Owner: University of Tartu
originally as Cladonia macilenta



P.L.Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (21709)
2008.03.04



P.L.Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (20522)
2008.03.04



P.L.Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (25110)
2008.03.04



Felix Schumm – CC BY-SA 4.0
[14653], Seychelles, Mahe, Morne Blanc, rechts der Straße von Victoria nach Port Glaud, 4°39.593' S, 55°26.248' E, 630 m. Leg. Schumm & Frahm 09.10.2008, det. Aptroot 2008.



Felix Schumm – CC BY-SA 4.0
[14653], Seychelles, Mahe, Morne Blanc, rechts der Straße von Victoria nach Port Glaud, 4°39.593' S, 55°26.248' E, 630 m. Leg. Schumm & Frahm 09.10.2008, det. Aptroot 2008.



Felix Schumm – CC BY-SA 4.0
[17480], Portugal, Azoren, Sao Miguel, zwischen Provoacao und Nordeste, Miradoro Tronqueira, Area Protegida da Tronqueira e planalto Graminhais, 37.79635° N, 25.18474° W, 682 m, Laurus-Erica azorica Wald. Leg. Schumm & Frahm 24.09.2011, det. Schumm 2013



Felix Schumm – CC BY-SA 4.0
[17480], Portugal, Azoren, Sao Miguel, zwischen Provoacao und Nordeste, Miradoro Tronqueira, Area Protegida da Tronqueira e planalto Graminhais, 37.79635° N, 25.18474° W, 682 m, Laurus-Erica azorica Wald. Leg. Schumm & Frahm 24.09.2011, det. Schumm 2013



Felix Schumm – CC BY-SA 4.0
[17480], Portugal, Azoren, Sao Miguel, zwischen Provoacao und Nordeste, Miradoro Tronqueira, Area Protegida da Tronqueira e planalto Graminhais, 37.79635° N, 25.18474° W, 682 m, Laurus-Erica azorica Wald. Leg. Schumm & Frahm 24.09.2011, det. Schumm 2013



Felix Schumm – CC BY-SA 4.0
[17480], Portugal, Azoren, Sao Miguel, zwischen Provoacao und Nordeste, Miradoro Tronqueira, Area Protegida da Tronqueira e planalto Graminhais, 37.79635° N, 25.18474° W, 682 m, Laurus-Erica azorica Wald. Leg. Schumm & Frahm 24.09.2011, det. Schumm 2013



Felix Schumm – CC BY-SA 4.0
[18968], Australia, Queensland, Crediton State Forest, 16 km southwest of Finch Hatton, 21°15' S, 148°31' E, 700 m, growing on dead logs in Eucalyptus grandis dominated woodland. Leg. J.A. Elix (21094) & H. Streimann, 01.07.1986, det. A.W. Archer.



Felix Schumm – CC BY-SA 4.0
[18968], Australia, Queensland, Crediton State Forest, 16 km southwest of Finch Hatton, 21°15' S, 148°31' E, 700 m, growing on dead logs in Eucalyptus grandis dominated woodland. Leg. J.A. Elix (21094) & H. Streimann, 01.07.1986, det. A.W. Archer.



Felix Schumm – CC BY-SA 4.0
[18968], Australia, Queensland, Crediton State Forest, 16 km southwest of Finch Hatton, 21°15' S, 148°31' E, 700 m, growing on dead logs in Eucalyptus grandis dominated woodland. Leg. J.A. Elix (21094) & H. Streimann, 01.07.1986, det. A.W. Archer.



Felix Schumm – CC BY-SA 4.0
[17480], Portugal, Azoren, Sao Miguel, zwischen Provoacao und Nordeste, Miradoro Tronqueira, Area Protegida da Tronqueira e planalto Graminhais, 37.79635° N, 25.18474° W, 682 m, Laurus-Erica azorica Wald. Leg. Schumm & Frahm 24.09.2011, det. Schumm 2013,
HPTLC in den Laufmitteln A, B’ und C nach Säurebehandlung bei Tageslicht und 366 nm UV-Langwelle. 1: Start 4: Position von Norstictinsäure 7: Position von Atranorin th: Thamnolsäure di: Didymsäure ba: Barbatsäure



Juri Nascimbene - CC BY-SA 4.0
Stelvio National Park, Reg. Trentino-Alto Adige Prov. Trento, Italy.
07.2005



Curtis Randall Björk, - CC BY-SA 4.0
Campus of Royal Roads University, Victoria, British Columbia, Canada Canada
2017



Juri Nascimbene - CC BY-SA 4.0
Italy, Trentino-Alto Adige, Trento, Val di Rabbi
2006


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/



Pier Luigi Nimis CC BY-SA 4.0
TSB 38797



Pier Luigi Nimis CC BY-SA 4.0
TSB 38797



Pier Luigi Nimis CC BY-SA 4.0
TSB 38799



Pier Luigi Nimis CC BY-SA 4.0
TSB 38799



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (9839)
2001/12/04



Pier Luigi Nimis - CC BY-SA 4.0
TSB 38797


Gabriele Gheza - https://lichenidilombardia.home.blog
Italy, Lombardia, Milano, Magenta, valle del Ticino, 114 m
10/2020


Gabriele Gheza - https://lichenidilombardia.home.blog
Italy, Lombardia, Milano, Magenta, valle del Ticino, 114 m
10/2020


Gabriele Gheza - https://lichenidilombardia.home.blog
Italy, Lombardia, Milano, Magenta, valle del Ticino, 114 m
10/2020


Gabriele Gheza - https://lichenidilombardia.home.blog
Italy, Lombardia, Milano, Magenta, valle del Ticino, 114 m
10/2020


Gabriele Gheza - https://lichenidilombardia.home.blog
Italy, Lombardia, br, Borno, 1054 m
04/2018


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=407&lang=en
France, Ardennes


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=407&lang=en
France, Ardennes


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=407&lang=en
France, Ardennes


Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=407&lang=en
France, Ardennes


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=719&lang=en
France, Menez, Meur
as var. bacillaris


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=719&lang=en
France, Menez, Meur
as var. bacillaris


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=719&lang=en
France, Lanildut
as var. bacillaris


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=719&lang=en
France, Lanildut
as var. bacillaris


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=719&lang=en
France, Lanildut
as var. bacillaris


Bernard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=719&lang=en
France, Lanildut
as var. bacillaris