Xanthoparmelia cumberlandiandia. These lichens may be immortal. See the New YoK Times article: nyti.ms/VtDY79 . Photographed at Point Reyes National Seashore.
Kohler's Medizinal-Pflanzen in naturgetreuen Abbildungen mit kurz erlauterndem Texte :.Gera-Untermhaus :Fr. Eugen Kohler,[1883-1914].biodiversitylibrary.org/page/303706
Ramalina menziesiilace lichen. Designated as California State Lichen, July 15, 2015. Ranges from Central Baja north to Alaska. Often specatular displays in coastal oak woodlands during the winter months. Photographed in Pope Valley, Napa County, CA.