abstract
age
annual
background
brown
circle
circular
concentric
crack
cut
design
forest
growth
history
illustration
isolated
life
line
log
lumber
material
natural
nature
old
organic
ornament
pattern
pine
plant
ring
ripple
rough
round
section
sequoia
shape
slice
split
stump
surface
texture
textured
timber
tree
trunk
white
wood
wooden
year