Pseudevernia furfuracea (L.) Zopf. var. ceratea (Ach.) D. Hawksw. forme lignicole.
Differs from Pseudevernia furfuracea var. furfuracea by its colours, less green and by its chemical reactions: C+ bright pink, KC+ red. Specimen presented here are typical of the wood poles of the Monts d'Arrée heathlands. This lignicolous form, often lush, is the most common in this habitat.*
