Cladonia digitata (L.) Hoffm.

Deutschl. Fl., 2: 124, 1796. Basionym: Lichen digitatus L. - Sp. Pl.: 1152, 1753, nom. cons.
Synonyms:
Distribution: N - Frl (Tretiach & Molaro 2007, Tomasi 2007), Ven (Nascimbene & Caniglia 1997, 2000b, 2002c, 2003c, Caniglia & al. 1999, Nascimbene 2005c, 2008c, 2011, Nascimbene & al. 2006e, 2009c, Giovagnoli & Tasinazzo 2014), TAA (Nascimbene & Caniglia 2000b, 2002c, Caniglia & al. 2002, Nascimbene 2003, 2005b, 2006b, 2006c, 2008b, 2013, 2014, 2014c, Nascimbene & al. 2005, 2006, 2006e, 2007b, 2008c, 2009, 2010, Nascimbene & Marini 2007, 2015, Lang 2009, Brackel 2013, Nimis & al. 2015), Lomb (Rivellini 1994, Rivellini & Valcuvia 1996, Alessio & al. 1995, Dalle Vedove & al. 2004, Nascimbene & al. 2006e, Brackel 2010, Gheza & al. 2015), Piem (Isocrono & al. 2004, 2006), VA (Piervittori & Isocrono 1999, Matteucci & al. 2008), Emil (Nimis & al. 1996, Benesperi & al. 2007), Lig (Brunialti & al. 1999, Watson 2014). C - Tosc (Tretiach & Nimis 1994, Senese & Critelli 2000, Loppi & al. 2004c, Benesperi & al. 2007, Benesperi 2011, Brackel 2015), Marc, Laz (Ravera 2002b), Abr (Nimis & Tretiach 1999). S - Bas, Cal (Puntillo 1996), Si.
Description: Primary thallus squamulose, the squamules prominent, to 1 x 1.5(-3) cm, rounded, entire, lobed or weakly incised, horizontally spreading, with farinose soredia along the up-turned margin, grey-green to olive-green above, white and farinose below, often pale orange near the attachment point. Podetia grey-green to olive-green, smoothly corticated with large, finely sorediate patches, to 1.5 cm tall, pointed or with irregular small cups gradually broadening toward the base. Apothecia rare, scarlet red, developing on the margins of cups. 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, slightly stalked or semi-immersed at the top of podetia or along the margins of cups. Conidia cylindrical. Photobiont chlorococcoid. Spot tests: K+ yellow, C-, KC-, P+ yellow, UV-. Chemistry: thamnolic acid; rhodocladonic acid in apothecia and pycnidia.
Note: a cool-temperate to boreal-montane, circumpolar species found on strongly weathered lignum, mosses, on the bases of trunks, sometimes on soil rich in humus; common only in the Alps, becoming much rarer southwards.
Growth form: Fruticose

Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)

Commonnes-rarity: (info)

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


pH of the substrata:

(info)

1

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4

5

Solar irradiation:

(info)

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5

Aridity:

(info)

1

2

3

4

5

Eutrophication:

(info)

1

2

3

4

5

Poleotolerance:

(info)

0

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Altitudinal distribution:

(info)

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5




Gabriele Gheza, Tromello (PV); Owner: Gabriele Gheza, Tromello (PV)


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (12974)
2001/12/04
detail of squamule with soredia


Andres Saag; Owner: University of Tartu


Triin Aimla; Owner: University of Tartu


P.L.Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (36842)
2008.02.28


E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (33224)
2008.04.02


E. Pittao; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (21697)
2008.04.02


Gabriele Gheza, Tromello (PV); Owner: Gabriele Gheza, Tromello (PV)


Gabriele Gheza, Tromello (PV); Owner: Gabriele Gheza, Tromello (PV)


Paolo Fontanesi, Reggio Emilia; Owner: Paolo Fontanesi, Reggio Emilia


Paolo Fontanesi, Reggio Emilia; Owner: Paolo Fontanesi, Reggio Emilia


Simonetta Peruzzi; Owner: Simonetta Peruzzi
Italy, Toscana
2010


Simonetta Peruzzi; Owner: Simonetta Peruzzi
Italy, Toscana
2010


Paolo Fontanesi; Owner: Paolo Fontanesi
Italy, Trentino-Alto Adige, al Nambrone, nel Parco Regionale Trentino dell'Adamello-Brenta.
Herbarium: Forum Natura Mediterraneo
2010


Paolo Fontanesi; Owner: Paolo Fontanesi
Italy, Trentino-Alto Adige, al Nambrone, nel Parco Regionale Trentino dell'Adamello-Brenta.
Herbarium: Forum Natura Mediterraneo
2010


Paolo Fontanesi; Owner: Paolo Fontanesi
Italy, Trentino-Alto Adige, al Nambrone, nel Parco Regionale Trentino dell'Adamello-Brenta.
Herbarium: Forum Natura Mediterraneo
2010


Paolo Fontanesi; Owner: Paolo Fontanesi
Italy, Trentino-Alto Adige, al Nambrone, nel Parco Regionale Trentino dell'Adamello-Brenta.
Herbarium: Forum Natura Mediterraneo
2010


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Udine, Bosco della Stua, Lago di Sauris, 1000m
09.09.2016


P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Italy, Friuli Venezia Giulia, Udine, Bosco della Stua, Lago di Sauris, 1000m
09.09.2016


Curtis Randall Björk, - CC BY-SA 4.0
Sugarbowl-Grizzly Den Provincial Park, British Columbia, Canada
August 2017