Phellodendron amurense
Common name: 
Amur Corktree
fel-o-DEN-dron a-moor-EN-se.
Native to (or naturalized in) Oregon: 
  • Deciduous tree, 30-45 ft (9-14 m), short trunk, spreading, horizontal, stout stems.  Bark on old trunks ridged and furrowed, gray-brown, with a cork-like pattern, especially in old age.  Leaves opposite, 25-40 cm long, pinnate (odd), 5-11(13) leaflets, each 5-10 cm long,  acuminate, margin entire, and lustrous dark green above.  Yellow to bronze yellow in fall.  Horseshoe leaf scar, petiole nearly encloses bud.  Flowers dioecious - male and female flowers on different plants - appear in late spring, small, yellowish green, in wide clusters.  Fruit yellowish, finally black, 10-15 mm diam., held into late fall, strong odor when crushed.
  • Sun, wide spreading root system, does well on many soil types.   Withstands drought and polluted air
  • Caution: This species is considered invasive to forests, woodlands, and parks in some parts of the eastern U.S.  Female trees produce abundant fruit/seeds, seeds are dispersed by birds and probably by water via streams and other drainages.  It may be wise to plant only non-fruit producing male trees.  See Phellodendron His Majesty™
  • Hardy to USDA Zone (3)4     Native to northern China, Manchuria and Japan
  • amurense: refers to the Amur River region in eastern Siberia
  • Oregon State Univ. campus: male tree in front of Memorial Union, west side.
  • Corvallis: female trees on Jefferson near 1st St. (across from Post Office).
Click image to enlarge
  • plant habit

    plant habit

  • plant habit, older tree

    plant habit, older tree

  • leafy branch

    leafy branch

  • leaf and enclosed bud

    leaf and enclosed bud

  • leaf, comparison

    leaf, comparison

  • flowering branches (male), summer

    flowering branches (male), summer

  • male flower cluster and flowers

    male flower cluster and flowers

  • immature fruit and leaflets

    immature fruit and leaflets

  • female flowers

    female flowers

  • leaves and fruit, summer

    leaves and fruit, summer

  • plant habit, fall

    plant habit, fall

  • leaves and fruit, fall

    leaves and fruit, fall

  • fruit and leaves, early winter

    fruit and leaves, early winter

  • trunk, bark

    trunk, bark

  • winter twigs and buds

    winter twigs and buds