abstract
aging
background
blurred
botany
color
common
corrosion
covered
dirty
ecology
foliage
foliose
forest
fungi
fungus
genomic sequencing
grained
grass
gray
growth
heart
high
ill
knot
lichens
life
limb
lumber
mossy
mushroom
nature
oak
pattern
plant
pollution
prunastri
redwood
resolution
structure
sunburst
surface
symbiosis
symbiotic
taylor
trunk
vertical
wild
wooden
yellow