Peltula obscurans

Peltula obscurans (common rock-olive) is a dark olive to dark gray squamulose lichen that grows on rock and soil in arid habitats around the world. It may grow as a rosette of squamulous lobes, or with widely scattered lobes. A single black apothecium may be centered on the lobe.^[1][2] The apothecia disc turns reddish-brown when wet, which contrasts with the lobes that turn olive-green when wet.^[1] It can be found in southern Europe, South America, southwestern North America, Africa, Asia, Australia, and Papua New Guinea.^[2]

Peltula obscurans
Scientific classification
Kingdom:	Fungi
Division:	Ascomycota
Class:	Lichinomycetes
Order:	Lichinales
Family:	Peltulaceae
Genus:	Peltula
Species:	P. obscurans
Binomial name
Peltula obscurans (Nyl.) Gyeln. (1935)
Synonyms
Endocarpiscum obscurans Nyl. (1872)