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).
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