abstract
age
annual
background
brown
circle
circular
closeup
concentric
concept
conceptual
crack
dry
felled
fissure
forest
growth
history
life
lines
log
lumber
material
natural
nature
old
pattern
plant
rift
ring
rings
ripple
rough
round
section
shape
slice
split
striped
stump
surface
symbol
texture
textured
timber
tree
trunk
wood
wooden
years