This form, quite rare, differs from the type by its occurrence on the bark of trees in humid oceanic forests where it is frequently associated with Enterographa crassa. Most often in small colonies of individuals separated by a slightly raised black hypothallus, the tones of the thallus range from purplish brown to dark brown-green with mauve reflections. Soralia are rarer than in the saxicolous form or else in large masses. Always close to the much more common saxicolous form.
