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Peltigera membranacea (Ach.) Nyl.

Synonyms:

Family: PELTIGERACEAE

Habitat: Ubiquitous

Description

   Thallus foliose, spreading in large patches, to 20-30 cm across, lobes entire and without folioles, 1-3 cm wide, tips down-turned or up-turned according to orientation, upper surface markedly bullate or embossed without foliole, grey-bluish when dry, grey, pale grey-brownish, brown-olive when moist, pale grey minutely farinose notably towards the margin, lower surface white or cream, with raised white veins not flattened, rhizines simple, white, dispersed, dagger-like. Apothecia more less abundant, ellipsoid or saddle-shaped, organized horizontally (usually as large as tall or larger in some cases), brown-red to brownish. Ascospores fili-fusiform, 3-5-septate, 50-73 x 3.5-4 µm. Chemical spot tests negative. Common, on covering mosses on rocks and tree trunks. Close to Peltigera canina that  grows on ground notably on calcareous dunes and with a lower surface displaying rhizine tufts feather-like. Also close to Peltigera hymenina of which apothecia  are nail-shaped (i.e. taller than larger), upper surface not bullate, lower surface with simple rhizines feather-duster-like. If clusters of schizidia are visible, see Peltigera praetextata. N.B. One typical fan-shaped form may be found on submerged rocks located in streams or on banks of small rivers characterized by the development of Osmunda regalisPeltigera membranacea forme saxicole.







Peltigera membranacea Cap de la Chèvre 1
Michel DAVID



Peltigera membranacea Stangala 1
Alain GERAULT



Peltigera membranacea Stangala 2
Alain GERAULT



Peltigera membranacea Cranou
Alain GERAULT



Peltigera membranacea Brennilis
Alain GERAULT



Peltigera membranacea Hôpital-Camfrout
Michel DAVID



Peltigera membranacea Huelgoat 1
Joël QUERELLOU



Peltigera membranacea Huelgoat 2
Joël QUERELLOU



Peltigera membranacea Huelgoat 3
Joël QUERELLOU



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