Degelia plumbea forma
This form is transtional between Degelia atlantica and Degelia plumbea, from whose it shares some of the hallmarks ;
Characteristics of Degelia atlantica : lengthen lobes without any visible network but only radial ribs, isidioid formations at the center of the thallus, apothecia not much prominent, brown-reddish to blackish.
Characteristics of Degelia plumbea : grey-blueish colours, some isidioid formations show a rough (granular) appearence, particularly around apothecia, as Degelia plumbea forme à petits granules isidioïdes.*