Gyalolechia bracteata (Hoffm.) A. Massal.

Ric. Auton. Lich. Crost.: 17, 1852. Basionym: Psora bracteata Hoffm. - Deutschl. Fl.: 169, 1796.
Synonyms: Caloplaca bracteata (Hoffm.) Jatta; Caloplaca bracteata f. alpina (Th. Fr.) Zahlbr.; Caloplaca bracteata f. deformis Erichsen?; Fulgensia bracteata (Hoffm.) Räsänen; Fulgensia bracteata subsp. deformis (Erichsen) Poelt?; Fulgensia bracteata var. alpina (Th. Fr.) Räsänen; Lecanora bracteata (Hoffm.) Röhl.; Placodium bracteatum (Hoffm.) Nyl.; Placodium fulgens var. alpinum Th. Fr.
Distribution: N - Frl, Ven (Nascimbene & Caniglia 1997, Caniglia & al. 1999, Brackel 2013), TAA, Lomb, Piem (Isocrono & al. 2004, Hafellner & al. 2004), VA (Piervittori & Isocrono 1999, Piervittori & al. 2001). C - Tosc (Vezda Lich. Rar. Exs. 172), Marc (Nimis & Tretiach 1999), Abr (Gheza & al. 2021, Di Nuzzo & al. 2021).
Description: Thallus crustose-placodioid, episubstratic, yellow to orange-yellow, sometimes yellowish-white-pruinose, with (sometimes poorly developed) radiating marginal lobes, the centre verrucose-areolate, forming orbicular to irregular, to 3-4 cm wide, often confluent rosettes. Lobes 0.5-1 mm broad and to 3 mm long, flattened, contiguous, radiating from the central part of thallus, which is densely covered in flattened, often elongate and lobe-like schizidia. Apothecia rare, lecanorine, sessile, 0.5-1.2 mm across, with an orange to brownish-orange, flat, smooth disc, and a thin, orange-yellow margin which at maturity separates into an internal, darker and thinner proper margin, and an external, paler thalline margin. Epithecium K+ red; hymenium colourless, 60-70 µm thick. Asci 8-spored, clavate, Teloschistes-type. Ascospores 1-celled, hyaline, ovoid to slightly pyriform, thin-walled, 9-12 x 3.5-5 µm. Pycnidia orange-yellow, immersed. Conidia bacilliform. Photobiont chlorococcoid. Spot tests: thallus and apothecia K+ red, C-, KC- P-, UV+ pale orange. Chemistry: thallus and apothecia with fragilin (major), emodin, parietin and other anthraquinones (minor).
Note: on calciferous soil and terricolous mosses in open situations, sometimes in fissures of calcareous rocks, mostly near or above treeline; parasitic of Thalloidima sedifolium when young. The record of Grillo (1998) from the coast of Sicilia, is certainly due to a misidentification.
Growth form: Crustose
Substrata: soil, terricolous mosses, and plant debris
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
paras Thalloidima sedifolium when young

Commonnes-rarity: (info)

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


P.L. Nimis CC BY-SA 4.0
GZU Dupl.Graec.Lich. (59)



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (9283)
2001/12/24



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: TSB (35718)
2003/01/22
sterile thallus


Andres Saag; Owner: University of Tartu


Triin Aimla; Owner: University of Tartu



Curtis Randall Björk, - CC BY-SA 4.0
Near Hope Bay, Nunavut, Northwest Territories, Canadaries, CanadaIsland, British Columbia, Canada
19.07.2014



Pier Luigi Nimis - CC BY-SA 4.0
TSB 42411



P.L. Nimis; Owner: Department of Life Sciences, University of Trieste
Herbarium: GZU Dupl.Graec.Lich. (59)
2003/04/28



Pier Luigi Nimis - CC BY-SA 4.0; Owner: Department of Life Sciences, University of Trieste
TSB 38006


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalolechia_bracteata.htm
France, Lanslebourg-Mont-Cenis, alt. 2000 m - Savoie
3/9/2013
var. alpina


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalolechia_bracteata.htm
France, Lanslebourg-Mont-Cenis, alt. 2000 m - Savoie
3/9/2013
var. alpina


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalolechia_bracteata.htm
France, Lanslebourg-Mont-Cenis, alt. 2000 m - Savoie
3/9/2013
var. alpina


Courtesy Danièle et Olivier Gonnet - Source: https://www.afl-lichenologie.fr/Photos_AFL/Photos_AFL_G/Textes_G1/Gyalolechia_bracteata.htm
France, Lanslebourg-Mont-Cenis, alt. 2000 m - Savoie
3/9/2013
var. alpina