Fellhanera bouteillei (Desm.) Vezda

    Thallus crustose, very thin, dispersed or continuous, minutely granular owing to farinose soralia, dull whitish, dull grey-greenish, bluish-green (fouling-like on leaves). Apothecia rare, sometimes absent, almost sessile, small urn-shaped at first soon opened, often clustered, 0.1-0.3 mm diam., disc white-pinkish to pale orange, margin paler more or less regular, wavy. Ascii 8-spored, utriform, 40-55 x 13-20 µm according to our measures. Ascospores ellipsoid, colourless, 1-septate, sometimes slightly constricted in the middle often delimiting unequal size cells, 10-15 x 3-6 µm according to literature, 10-15 x 3-5 µm according to our measures. Pycnidia immersed, bottle-shaped with a short neck and well opened ostiole. Photobiont: chlorococcoid. Chemical spot tests negative. In our prospection area, mostly on leaves of evergreen trees and small twigs (observation on the field requires the use of magnification lens) especially Buxus, Cupressus, Abies, Pseudotsuga, etc., in sheltered situations with high humidity rate. Easily confused, unless microscope observation of ascospores is done, with  Fellhanera subtilis that are 3-septate.*