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Caloplaca cf. crenularia
The thallus is a thin, whitish-grey, rarely almost black, cracked-areolate crust. The apothecia are rust-brown coloured when young with defined margins that remain somewhat lustrous even when dry.
Usually on base-poor rocks, common on often damp rocks and old walls. Spotted on the stone (granite) walls of an old house
Camera Model: NIKON D300. Exposure Time: 1/60 sec.; f/32; ISO Speed Rating: 200. Focal Length: 90.0 mm. Flash fired.