Solorina saccata (L.) Ach.
Foliose thallus formed by rounded lobes with sinuous, wavy edges arranged in a rosette 2-6 (10) cm in diameter, upper surface smooth, light gray in dry weather, green if damp, underside tomentose, dirty white to brownish with rhizines. Apothecia located at the bottom of a depression in the center of the lobe, 4-6 mm in diameter, reddish-brown then blackish-brown. Cylindrical asci with 4 spores, 120-130 x 25-30 µm according to our measurements. Spores brown, rough, 1-septate in a "ball of wool", 34-60 x 16-26 µm according to the literature; 35-50 x 18-22 µm according to our measurements. Photobiont: Coccomyxa and Nostoc in internal cephalodia. No significant color chemical reactions. Species coming to the ground in mountain on limestone grounds.