Fulgensia fulgida (Nyl.) Szatala

    Thallus placodioid, 2-8 cm diam., made of large and pleated lobes, upper surface slightly furfuraceous, yellowish, white yellowish when dry, typically lemon-yellow when moist. Apothecia lecanorine, usually present and numerous, 1-2 mm diam., disc brown-red, red, red-orange, exciple thin, yellow, minutely granular. Ascospores colourless, simple (the sometimes observed 1-septate aspect is artefactual), typically clavate, 14-20 x 5-6 µm. Photobiont: Trebouxia. Mediterranean, thermophilic, saxicolous and calcicolous, grows mainly on vertical walls of calcareous rocks. N.B. This species is absent in our prospection area, however we include it in this list in order to examplify the main differences with Fulgensia fulgens that may be confused. The latter has a terricolous habitat, a more yellowish thallus with few or no apothecia and smaller and less clavate ascospores. N.B. As Fulgensia fulgens this species seems to exchange its photobiont, Trebouxia Cf. asymmetrica  with other species (see the picture of Psora decipiens ?).*