abstract
age
annual
art
background
black
circle
circular
concentric
contour
cross
cut
design
drawn
forest
geometric
graphic
grid
growth
icon
illustration
land
line
logo
map
nature
outline
pattern
ring
ripple
section
shape
sketch
slice
stump
texture
timber
topo
topographic
topography
trail
tree
trunk
wave
wavy
white
wood
wooden