Espécies de Parmotrema (Parmeliaceae, Ascomycota) do litoral Centro-Sul do Estado de S？o Paulo IV.: grupo químico protocetrárico

in a survey of the species pertaining to genera of large parmeliae occurring in the coastal areas of the center-south coast of s？o paulo state, brazil, eleven species of parmotrema sensu stricto (foliose thalli with rounded lobes usually more than 0.5 cm wide with nude lower margins) containing protocetraric acid as main medullar substance were found. identification key, descriptions, comments, and illustrations are provided for these species.