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Peltigera horizontalis (Huds.) Baumg.

Synonyms:

Family: PELTIGERACEAE

Habitat: Ubiquitous

Description

    Thallus foliose, to 30 cm across, lobes 1-3 cm wide and 3-5 cm long, margin upturned and slightly crisped, upper surface smooth and glossy, grey-greenish to grey-bluish when moist, brownish when dry, lower surface very pale brown to whitish towards the margins, darker towards the center, with more or less anastomosed veins, brown blackish, delimiting in between oval or circular white sections, rhizines fasciculate, in brooms, clustered and ordered in concentrical rings. Apothecia rounded, occasionally broader than long, 4-8 mm diam., typically dish-like, horizontal, disc red-brown, exciple uneven. Ascospores fili-fusiform, 3-septate, 30-46 x 3-7 µm. 27-47 x 4-7 (8) µm according to our measurements. Chemical spot tests negative. On mossy trunks of trees in old woodlands, mainly near the ground or at the trunk base.*







Peltigera horizontalis Doubs 1
Jacques HAINE



Peltigera horizontalis Doubs 2
Jacques HAINE



Peltigera horizontalis Ardennes 1
Jacques HAINE



Peltigera horizontalis Ardennes 2
Jacques HAINE



Peltigera horizontalis Ardennes 3
Jacques HAINE



Peltigera horizontalis Ardennes 4
Jacques HAINE



Peltigera horizontalis Ardennes 5
Jacques HAINE



Peltigera horizontalis Huelgoat
Michel DAVID



Peltigera horizontalis Coupe apoth茅cie KOH Dr么me 4
Jacques HAINE



Peltigera horizontalis face inf茅rieure Dr么me 2
Jacques HAINE



Peltigera horizontalis Dr么me
Jacques HAINE



Peltigera horizontalis Rhizines Dr么me 1
Jacques HAINE



Peltigera horizontalis Cher 1
Arnaud DELHOUME



Peltigera horizontalis Cher 2
Arnaud DELHOUME



Peltigera horizontalis Cher 3
Arnaud DELHOUME



Peltigera horizontalis Asques Lugol Dr么me 5
Jacques HAINE



Peltigera horizontalis Asques KOH Dr么me 6
Jacques HAINE



Peltigera horizontalis Asques Bleu Coton Dr么me 7
Jacques HAINE



Peltigera horizontalis Spores KOH Dr么me 8
Jacques HAINE



Peltigera horizontalis Spores Bleu Coton Dr么me 9
Jacques HAINE



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