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Protoparmelia atriseda (Fr.) R. Sant. & J. V. Wirth

Synonyms:

Family: PARMELIACEAE

Habitat: Sub-montane

Description

   Thallus crustose, more or less prominent or globose, 1-4 cm diam., composed of small mounds of rounded or hemispherical verrucose areoles separated by a network of small crevices, bright, brown-reddish, brown-yellowish, brownish, brown-orangy, showing a thick and blackish prothallus. Apothecia usually numerous, at first immersed in the areoles, then slightly sessile, disc bright, brown to dark brown, exciple thin, concolourous to the thallus or paler. Ascus utrifom bearing 8 ascospores. Ascospores colourless, oblong, apices slightly rounded, 8-15 x 5-7 µm according to literature, 10-14 (16) x (4) 5-7 (8) µm according to our measurements. Photobiont: trebouxioid. C-, K+ yellow > orange, KC-, Pd+ yellow to orange, UV-. Parasite, at least at the beginning, of yellow Rhizocarpons and notably Rhizocarpon geographicum and Rhizocarpon lecanorinum thriving on acidic siliceous rocks.







Protoparmelia atriseda Monthermé 1
Jean-Pierre DUVIVIER



Protoparmelia atriseda Monthermé 2
Jean-Pierre DUVIVIER



Protoparmelia atriseda Ardennes 1
Jacques HAINE



Protoparmelia atriseda Ardennes 2
Jacques HAINE



Protoparmelia atriseda Ardennes 3
Jacques HAINE



Protoparmelia atriseda RĂ©action au K Ardennes 4
Jacques HAINE



Protoparmelia atriseda RĂ©action au KC Ardennes 5
Jacques HAINE



Protoparmelia atriseda RĂ©action au P Ardennes 6
Jacques HAINE



Protoparmelia atriseda Coupe apothécie eau Ardennes 7
Jacques HAINE



Protoparmelia atriseda Asque eau Ardennes 8
Jacques HAINE



Protoparmelia atriseda Asques Bleu Coton Ardennes 9
Jacques HAINE



Protoparmelia atriseda Asques Lugol Ardennes 10
Jacques HAINE



Protoparmelia atriseda Spores eau Ardennes 11
Jacques HAINE



Protoparmelia atriseda Spores Bleu Coton Ardennes 12
Jacques HAINE



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