Protoparmelia montagnei (Fr.) Sancho & Crespo s.l.
Thallus, more or less thick, variable, surface irregular, brown-greyish, pale brownish with olive-green tinge (never warm colour), prothallus distinct when young and parasite, blackish. Apothecia numerous, 0.5-1.5 mm diam., immersed or sessile, disc flat, matt, dark brown, sepia, exciple concolourous or paler. Ascii 8-spored, 40-50 x 12-15 µm according to our measures. Ascospores oblong to ellipsoid, apices rounded, 9-13 x 2-4 µm according to literature, 8-13 x 2.5-4 according to our measures. Pycnidia numerous. Photobiont: Trebouxioid. Three chemotypes are known (chemical reactions are performed on the upper part of medulla in order to avoid contamination by parasited lichens):