Fuscopannaria sampaiana (Tav.) P. M. Jorg.
Thallus crustose, composed of thick, coarse, more or less appressed and intricate squamules, wavy apices, upper surface pale brown-redish with grey-blue tinge when moist, brown-redish when dry (bread crust-like), areoles with paler margins and gnarled coarsely granular, cream-coloured, ± effuse, marginal and laminal soredia, lower surface felt-like blue-blackish, squamules typically laid out on the large prothallus carpet-forming, conspicuous, dark-brown when moist, blackish when dry. Seldom fertile and apothecia unknown. Photobionte : Nostoc. Chemical spot tests negative. Very rare, in our prospection area, on smooth or mossy bark of mature trees, especially Fagus, Ulmus and Fraxinus, etc., in humid relict oceanic woodlands. See Parmeliella testacea of which the soralia are grey-bluish and the prothallus less developed.*