blue-gray upper surface, brown lower surface. Tight against rock
abundant dark brown apothecia
the red stuff (green Usnea for comparison)
and nearby pine trees were full of it.
The Parmeliaceae is a large and diverse family of Lecanoromycetes. With over 2000 species in roughly 87 genera, it is regarded as the largest family of lichen forming fungi. The most speciose genera in the family are the well-known groups: Xanthoparmelia (800+ species), Usnea (500+ species), Parmotrema (350+ species), and Hypotrachyna (190+ species).