Parmotrema arteagum

Parmotrema arteagum is a species of foliose lichen in the family Parmeliaceae. It was described as new to science in 1982 by Robert Egan. Found in west-central Mexico, the holotype collection was made in Arteaga, after which the lichen is named. It grows on the branches of oak and other deciduous trees in woodlands at elevations between 600–900 metres (2,000–3,000 ft). Parmotrema arteagum is a member of the Parmotrema perforans species complex because of its broad lobes with cilia at the margins, perforations in the apothecia, and lower surfaces with white borders that lack rhizines....read more on Wikipedia.