Solenopsora vulturiensis A. Massal.
Thallus highly variable, made of squamules, scattered or in piles (mainly on ground or in rock crevices), to 0.5 mm, warted or coralloid, pruinose tinged-blue with granular soredia, apices swollen and whitish, whole thallus whitish when very dry, grey-glaucous to pale greenish tinged blue when moist. Apotecia rare, to 0.5 mm diam., disc flat then convex or even globose when old, hyaline grey-brown, pale brown tinged with pink, brown-pink, exciple thin, paler, excluded when mature. Ascii urn-shaped, 40-55 x 15-20 µm according to our measures. Ascospores ellipsoid, simple at first then 1-septate at maturity, 9-12 x 4-5 µm according to literature, 10-13 (14) x 4-5 µm according to our measures. C-, K+ faint pale yellow, KC+ faint pale yellow, Pd- or dark yellow. Photobiont: Chlorococcoïd. In humid crevices and cracks of the xeric supra-littoral zone, and also on damp walls of rocks or on ground where this species is inconspicous and hardly visible (especially in case of dry weather), occasionally on old walls of chapels and churches inland, and in that case most often sterile. Not to be confused with Trapeliopsis wallrothii that is C+ red and never green-bluish when moist, nor with Lepraria sp. for strongly sorediate species.