  alder |
  aspen |
  buckeye |
  birch |
  blue spruce |
  cherry |
  crab apple |
  cypress |
  dogwood |
  douglas fir |
  elder |
  elm |
  ginkgo |
  green ash |
  hackberry |
  hemlock |
  hickory |
  holly |
  locust |
  lombardy poplar |
  magnolia |
  maple |
  moutain ash |
  mulberry |
  oak |
  pecan |
  plum |
  ponderosa pine |
  red maple |
  red spruce |
  redbud |
  redwood |
  sassafras |
  sweetgum |
  sycamore |
  walnut |
  whitebark pine |
  white oak |
  yellow poplar |
