lichen with yellow-grey or bluish-grey thallus, with adpressed lobes, slightly broader at ends. Under surface it is black with short, simple rhizines. Isidia are usually abundant, variable in form. Apothecia are occasional, with red-brown discs with thin margins. Crenulate and isidiate.
0on a stone wall made of shale rocks
Camera Model: NIKON D300. Exposure Time: 1/60 sec. f/22 ISO Speed Rating: 200. Focal Length: 90.0 mm. Flash fired