Parmotrema hydrium is a new lichen species discovered during a survey of Parmeliaceae in the Cantareira mountain range of southeastern Brazil. In its medullary chemistry, the species contains several fatty acids and other substances, including small amounts of atranorin, typically restricted to the soralia and young lobes.
cilia; Parmeliaceae; Parmotrema hababianum; Parmotrema grayanum; soredia
