Gloeoheppia turgida

Gloeoheppia turgida is a species of gelatinous lichen in the family Gloeoheppiaceae. The species was first described in 1810 by Erik Acharius as Endocarpon turgidum, based on a Swiss collection made by Johann Christoph Schleicher. It was transferred to the genus Gloeoheppia in 1935, and a later revision upheld Gloeoheppia as distinct from Heppia, and fixed the application of Acharius's name by designating Schleicher's specimen as the lectotype. The species forms small, scaly squamules up to 4 mm across that become strongly swollen and convex, with a dark olive to greenish-black upper surface that may carry a thin white, powdery pruina. It grows on calcareous soil or rock in warm, dry parts of the Mediterranean basin, in Macaronesia, and in the Saharo-Arabian region....read more on Wikipedia.