A distant moon with forested craters….
Rather a granite rock covered in lichen. Lichen is not a plant but has a symbiotic relationship with fungi & algae. There are nearly 20,000 species of lichen which cover approximately 6% of the earths surface. It is slow growing, at 0.5mm per year on average. That makes these specimens somewhere over 100 years old.
© Gary Light
Creative Commons: (CC BY-NC-ND 4.0)