Phellodendron amurense, Amur Corktree

Gardens & Landscapes, Invasive Species, Extension Master Gardener January 28, 2013 Print Friendly and PDF

Invasive Species: Phellodendron amurense, Amur Corktree

Amur corktree is an invasive perennial tree that can grow from 35 to 45 ft. (10 to 14 m) tall. The tree has a short trunk with spreading branches. The bark is thick and corky. Leaves are opposite, compound (divided into 5 to 11 leaflets), and 10 to 15 in. (25 to 38 cm) long. Leaflets are elliptical, acute at the apex, 2.5 to 4.5 in. (6 to 11 cm) long, and smell like turpentine when crushed. Flowering occurs in late spring, when bunches of small green flowers develop. Fruits are drupes, 0.25 to 0.5 in. (0.6 to 1.3 cm) in diameter and bright green (black when mature). Amur corktree is native to eastern Asia and was introduced into the United States in 1856. Trees prefer full sun and rich soils.

What are invasive species and why should we be concerned about them? 


Taxonomy: Scientific and Common Names for This Species

Sapindales > Rutaceae > Phellodendron amurense Rupr.

Synonym(s): none

Phellodendron amurense - USDA PLANTS Profile

Distribution Maps

Amur corktree - The reported distribution of this invasive species across the United States. (Source: Invasive Plant Atlas of the United States)

Up-to-the-minute distribution maps and why they are important

Reporting This Invasive Species

What is the best way and place to report the occurrence of an invasive species? 

How to report an invasive species sighting to EDDMapS - Early Detection & Distribution Mapping System

EDDMapS - Report an invasive species to EDDMapS

Cooperative Extension Offices - Find your local Cooperative Extension office on this map provided by USDA

How to Identify

This invasive species can be identified by looking for the characteristics described in the paragraphs that follow.

Tree

An invasive perennial tree that can grow from 35 to 45 ft. (10 to 14 m) tall. The tree has a short trunk with spreading branches. The bark is thick and corky.

Patrick Breen, Oregon State University, bugwood.org Chris Evans, River to River CWMA, bugwood.org

Foliage

Leaves are opposite, compound (divided into 5 to 11 leaflets), and 10 to 15 in. (25 to 38 cm) long. Leaflets are elliptical, acute at the apex, 2.5 to 4.5 in. (6 to 11 cm) long, and smell like turpentine when crushed.

Richard Webb, Self-employed horticulturist, bugwood.org Patrick Breen, Oregon State University, bugwood.org

Flower

 Flowering occurs in late spring, when bunches of small green flowers develop.

   
bugwood.org bugwood.org

Fruit

Fruits are drupes, 0.25 to 0.5 in. (0.6 to 1.3 cm) in diameter and bright green (black when mature).

Patrick Breen, Oregon State University, bugwood.org Patrick Breen, Oregon State University, bugwood.org

Native Species That Resemble Amur Corktree

 

- Images at invasive.org

   
bugwood.org bugwood.org

 

- Images at invasive.org

   
bugwood.org bugwood.org

 

Additional Images for Amur Corktree

Amur corktree - Images at Invasive.org

 

Learning Resources for Amur Corktree

Fact Sheet - Pennsylvania Dept. of Conservation and Natural Resources

 

Additional Information, Biology, Control and Management Resources

Control and management recommendations vary according to individual circumstances. Location, habitat, weather, and a variety of other conditions are factors that help determine the best treatment choice. To find the safest and most effective treatment for your situation, consult your state's land-grant institution. If you will use chemicals as part of the control process, always refer to the product label.

United States Land-Grant University System - Find your land-grant university's College of Agriculture, Cooperative Extension Service, or other related partner on this map provided by USDA.

Weed of the Week - USDA Forest Service

Weeds Gone Wild: Alien Plant Invaders of Natural Areas - Plant Conservation Alliance

Phellodendron amurense - Missouri Botanical Garden

Fact Sheet - USDA Forest Service


 

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This work is supported by the USDA National Institute of Food and Agriculture, New Technologies for Ag Extension project.