Espécies de Parmotrema (Parmeliaceae, Ascomycota) do litoral centro-sul do Estado de S？o Paulo V: grupo químico alector？nico

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, eight species of parmotrema a. massal. sensu stricto (foliose thalli with rounded lobes usually more than 0.5 cm wide with nude lower margins) containing alectoronic acid as main medullar substance were found. identification key, descriptions, comments, and illustrations based on brazilian material are provided for these species.