Ingaderia sorediata forme bleue.

    This particular form has a thallus covered with large plates of blue, blue-black soredia and grows on the humid and slightly acidic rocks of the mesic zone subject to splashes of sea water and not sunny, sometimes in the company of Roccellographa circumscripta but the more often in colonies formed only of this form, it is linked by intermediates to the type of Ingaderia sorediata which occurs much more under overhangs and in crevices and which is blue-grayish.

N.B. Probably the "free form" and non-parasitic of Ingaderia sorediata.