Crustose saxicolous, granular, on eutrophic siliceous rocks.
Note: epithecium green, hipothecium brown. Thallus K+ amarillo, I-, KC-, C-, spores browinsh, with a septum, 11-16 x 6-8,5 micras:
Lithology: schist and conglomerate with quartzite
Altitude: 1.375 and 320 m
Municipality: Abrucena and Pechina









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Black apothecium, lecideinum:
Soredia on the margins and the underside of thallus




For some authors, it´s synonimous of P. nigrum, we prefer to separate it.
Picnoascocarpes laminar or submarginal:

