Physconia distorta forme thermophile.

    This form is characterized by its very strip-shaped lobes, not overlapping, with a very strongly pruinose whitish-grey upper face (including the apothecia) and a blackish lower face with numerous swab-shaped rhizines forming a carpet. Subclavate asci of 110-120 x 30-40 µm according to our measurements. Spores 1-septate, dark gray, in "capsule", 26-35 x 12-20 µm according to our measurements. C-, K-. KC-, P-. Form not rare in Provence on the trunks of trees in open forests, rarer further north.