Porpidia - Species Dictionary - UK and Ireland : iSpot Nature - Your place to share nature. iSpot is a website aimed at helping anyone identify anything in nature. Once you've registered, you can add an observation to the website and suggest an identification yourself or see if anyone else can identify it for you.

Natural History Museum's UK Species Inventory
Fungi and Lichens
Fungi, Ascomycota, Lecanoromycetes, Lecideales, Porpidiaceae, Porpidia
Porpidia melinodes, Porpidia ochrolemma, Porpidia zeoroides, Porpidia cinereoatra, Porpidia crustulata, Porpidia hydrophila, Porpidia platycarpoides, Porpidia soredizodes, Porpidia tuberculosa, Porpidia speirea, Porpidia contraponenda, Porpidia flavicunda, Porpidia superba, Huilia albocaerulescens, Porpidia confluenta, Porpidia flavocruenta, Porpidia grisea, Porpidia islandica, Porpidia lowiana, Porpidia macrocarpa, Porpidia nadvornikiana, Porpidia pachythallina, Porpidia rugosa, Porpidia striata, Porpidia thomsonii