Racodium rupestre Pers.

Racodium rupestre Pers.

Tent. Disp. Meth. Fung.: 76, 1797.

Synonyms: Cystocoleus rupestris (Pers.) Rabenh.; Rhacodiopsis rupestris (Pers.) Donk

Distribution: N - TAA (Muggia & al. 2008b, Muggia & Grube 2010), Lomb, VA (Borlandelli & al. 1996, Piervittori & Isocrono 1997, 1999).

Description: Thallus minutely filamentous, black to brown-black, forming small tufts on the rock, which often coalesce into 10-15 cm wide and 0.3-0.5 mm tall cottony mats. Filaments 10-15 µm thick, straight, not nodulose, 0.2-1 cm long, covered with dark brown, regularly parallel hyphae with straight walls (the individual cells appearing rectangular), closely surrounding and adhering to single filaments of Trentepohlia. Apothecia and pycnidia unknown. Photobiont trentepohlioid (the chloroplasts I+ blue-black). Spot tests: all negative. Chemistry: without lichen substances.

Note: a widespread, temperate to southern boreal-montane, circumpolar lichen found on shaded, more or less steeply inclined surfaces of siliceous rocks protected from rain, with a rather wide altitudinal range; undercollected, and certainly more widespread in the Alps.

Growth form: Crustose

Substrata: rocks

Photobiont: Trentepohlia

Reproductive strategy: mainly asexual, by thallus fragmentation

In underhangs rarely wetted by rain

Commonnes-rarity: (info)

Alpine belt: extremely rare

Subalpine belt: rare

Oromediterranean belt: very rare

Montane belt: rare

Submediterranean belt: very rare

Padanian area: absent

Humid submediterranean belt: absent

Humid mediterranean belt: absent

Dry mediterranean belt: absent

pH of the substrata:

1

2

3

4

5

(info)

Solar irradiation:

1

2

3

4

5

(info)

Aridity:

1

2

3

4

5

(info)

Eutrophication:

1

2

3

4

5

(info)

Poleotolerance:

0

1

2

3

(info)

Altitudinal distribution:

1

2

3

4

5

6

(info)

Predictive model

Herbarium samples

P.L. Nimis; Owner: Department of Life Sciences, University of Trieste

Herbarium: TSB (2576)
2001/11/29

Juri Nascimbene - CC BY-SA 4.0

Stelvio National Park, Reg. Trentino-Alto Adige Prov. Trento, Italy.
07.2005

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Textes_R2/Racodium_rupestre.htm

France, 31/05/2018 - Fumay, les Hesses, alt. 250 m - Ardennes

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Textes_R2/Racodium_rupestre.htm

France, 31/05/2018 - Fumay, les Hesses, alt. 250 m - Ardennes

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Textes_R2/Racodium_rupestre.htm

France, 31/05/2018 - Fumay, les Hesses, alt. 250 m - Ardennes

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Textes_R2/Racodium_rupestre.htm

France, 31/05/2018 - Fumay, les Hesses, alt. 250 m - Ardennes

Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_R/Textes_R2/Racodium_rupestre.htm

France, 31/05/2018 - Fumay, les Hesses, alt. 250 m - Ardennes

Berbard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=624&lang=en

France, Cranou

Berbard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=624&lang=en

France, Cranou

Berbard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=624&lang=en

France, Landévennec

Berbard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=624&lang=en

France, Menez-Meur

Berbard Bouffinier - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=624&lang=en

France, Menez-Meur

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=624&lang=en

Ardennes

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=624&lang=en

Ardennes

Jacques Haine - Source: http://www.lichensmaritimes.org/index.php?task=fiche&lichen=624&lang=en

Ardennes

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