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Fulgensia fulgens (Sw.) Elenkin

Synonyms:

Family: TELOSCHISTACEAE

Habitat: Ubiquitous

Description

   Thallus squamulose, rosette-like, up to 4 cm diam., marginal lobes distinct, clearly differentiated, made of convex squamules, 1-2 mm wide, indented and appressed, canary-yellow, bright yellow, center whitish due to schizidia production exposing the white medulla. Apothecia more or less abundant, 1-1.5 mm diam., disc plane, bright orange, margin pale yellow to yellow-orange soon excluded (fertile specimen resemble to fried eggs and are easily recognizable). Ascospores colourless, simple (but sometimes artefactually 1-septate shaped under microscope), variable in shape, pyriform, ellipsoid, clavate,  9-12 x 3-5 µm. Photobiont: Trebouxia. Thallus and apothecia : K+ purple. Not especially maritime, but not rare on mossy soils of calcareous and dry dunes near the seashore (this species is a good indicator of calcareous dunes). See Fulgensia fulgida, mediterranean thermophilic calcicolous and saxicolous species with a more yellow-greenish thallus and numerous redder apothecia, and above all larger and markedly clavate ascospores. *

N.B. This species shares the same photobiont (Trebouxia Cf. asymmetrica) as Toninia sedifolia that makes a good substratum to the Fulgensia thallus. This complex phenomenon has been described in BECK A., KASALICKY T., RAMBOLD G. 2002. Myco-photobiontal selection in a Mediterranean cryptogam community with Fulgensia fulgida. New Phytologist, 153: 317-326. Some pictures below illustrate this phenomenon.*

 







Fulgensia fulgens Camaret Pen-Hat 1
Michel DAVID



Fulgensia fulgens Lostmarc'h
Alain GERAULT



Fulgensia fulgens La Palue 3
Michel DAVID



Fulgensia fulgens Camaret 1
Michel DAVID



Fulgensia fulgens Tréflez
Bernard BOUFFINIER



Fulgensia fulgens et Toninia sedifolia La Palue
Michel DAVID



Fulgensia fulgens Laon
Jacques HAINE



Fulgensia fulgens La Palue 4
Michel DAVID



Fulgensia fulgens Asque dans l'eau La Palue 5
Jacques HAINE



Fulgensia fulgens Spores dans l'eau La Palue 6
Jacques HAINE



Fulgensia fulgens et Squamarina cartilaginea Kerdreux
Michel DAVID



Fulgensia fulgens et Placidium lacinulatum Lostmarc'h 2
Michel DAVID



Fulgensia fulgens et Placidium lacinulatum Lostmarc'h 3
Michel DAVID



Fulgensia fulgens Camaret 2
Michel DAVID



Fulgensia fulgens Camaret Pen-Hat 2
Michel DAVID



Fulgensia fulgens Camaret Pen-Hat 3
Michel DAVID



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