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Physcia tribacioides  Nyl.

Synonyms:

Family: PHYSCIACEAE

Habitat: Oceanic zone

Description

   Thallus foliose, irregular, elongate or rosette-shaped, 3-8 cm across, composed of lobes, tightly appressed to the substratum, 0.5-1.5 mm wide, margin indented or more or less crenulate, upper surface not distinctly white flecked, grey-whitish, pale grey-greenish when dry, green when moist, covered with soralia, mostly marginal, farinose, globose, 0.5-1.5 mm diam., whitish when dry (never bluish), white-yellowish when moist, underside pale brown, simple whitish to brown rhizines. Apothecia very rare, sessile, 1-1.5 mm diam., disc brown-reddish, not pruinose, thalline exciple, distinct, concolourous to the thallus. Ascospores brownish, more or less polarilocular, 17-22 x 7-10 µm. Photobiont: Trebouxioid. Cortex and medulla : C-, K+ yellow, Pd-.  Thermophile, maritime and oceanic trends, on bark of tree trunks, isolated or in aalignment near the sea. N.B. Ths species seems to be expanding  owing to the global warming.*







Physcia tribacioides Cap de la Chèvre 1
Bernard BOUFFINIER



Physcia tribacioides Crozon 1
Bernard BOUFFINIER



Physcia tribacioides Fertile Sainte Marie du MĂ©nez Hom 1
Bernard BOUFFINIER



Physcia tribacioides Cap de la Chèvre 4
Bernard BOUFFINIER



Physcia tribacioides Kergoat 1
Bernard BOUFFINIER



Physcia tribacioides Humide Cap de la Chèvre 6
Bernard BOUFFINIER



Physcia tribacioides Fertile Sainte Marie du MĂ©nez Hom 2
Bernard BOUFFINIER



Physcia tribacioides Fertile Sainte Marie du MĂ©nez Hom 2
Bernard BOUFFINIER



Physcia tribacioides Sainte Marie du MĂ©nez Hom 4
Bernard BOUFFINIER



Physcia tribacioides Crozon 2
Bernard BOUFFINIER



Physcia tribacioides (avec Flavoparmelia caperata) Kergoat 2
Bernard BOUFFINIER



Physcia tribacioides fertile Le Faou 1
Bernard BOUFFINIER



Physcia tribacioides fertile Le Faou 2
Bernard BOUFFINIER



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