![Porpidia albocaerulescens ( Smokey-Eyed Boulder Lichen )](https://mushroomsofct.com/wp-content/uploads/2023/04/IMG_012147-768x1024.jpg)
Porpidia albocaerulescens is a lichen species that belongs to the family Lecanoraceae. Its name is derived from the Latin words “porpido” meaning “to cover” and “albocaerulescens” meaning “white-blue”. This lichen is characterized by its crustose thallus that is white to pale gray in color and has a smooth surface. The apothecia, which are the fruiting bodies of the lichen, are black and have a raised margin. The hymenium, which is the layer of cells that produces spores, is blue-black in color. Porpidia albocaerulescens can be easily distinguished from other similar-looking lichens such as Porpidia crustulata and Porpidia macrocarpa by its white to pale gray thallus and blue-black hymenium. Overall, Porpidia albocaerulescens is a beautiful and unique lichen species that is a delight to observe in its natural habitat.
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