The lichen is thriving in pure mountain nature. A tree covered with leafy foliose lichens and shrubby fruticose lichens Common lichen growth forms Letharia vulpina, wolf lichen, grows like a multiple-branched tuft or leafless mini-shrub, so it has a fruticose growth form. Flavoparmelia caperata has leaf-like structures, so it is foliose. Caloplaca marina grows like an orange crust coating the rock, so it is crustose. Caloplaca thallincola grows like a crust, and in a pattern that radiates outward from the center, so it has a crustose placodioid growth form. Pannaria lurida forms small leaf-like scales crustose below but free at the tips, so it is squamulose. Chrysothrix chlorina grows like powder dusted on the rock so it is leprose. Collema nigrescens is gelatinous, without internal structure for its parts. A lichen is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi in a symbiotic relationship.
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