Leprocaulon quisquilare (Leers) M. Choisy = Leprocaulon microscopicum (Vill.) Gams ex D. Hawksw.

    Primary thallus forming a dense granular and leprose crust, green-glaucous, secondary thallus composed of pseudopodetia, 2-10 mm tall, more or less ascending, carpet-forming or in small tufts, simple or branched, twisted, covered with granules, grey-glaucous, green-glaucous sometimes tinged bluish. Apothecia unknown, Photobiont: Trebouxia. Chemical spot tests negative. Very strong maritime trends, in crevices of dry walls on coastal rocks, also in earth cavities of embankments, less frequently inland.

N.B. The pseudopodetia are a significant trait of this species and facilitate the differenciation with  rather similar Lepraria species.

N.B. Same aspect as some Stereocaulon species but greenish.