abstract
backdrop
background
bark
biology
brown
close up
color
concept
detail
ecology
ecosystem
environment
environmental
evernia
evernia divaricata
forest
fresh
freshness
green
lichen
moss
natural
nature
old
organic
parmelia
pine
pinus
rough
species
sustainability
texture
textured
timber
tree
trunk
usnea
usnea hirta
wet
wood