Phellodendron amurense - Amur Corktree
Family: Rutaceae

Hear the scientific name

Phellodendron amurense is a relatively tough, functional, low maintenance tree characterized by corky bark and interesting form. A male cultivar of the Amur Corktree is preferable in some situations as the fruit litter may be a nuisance.

F   E   A   T   U   R   E   S
  form Form

-deciduous tree

-broad spreading vase

-30-45' tall with equal spread

-open rounded crown delineated by a few large branches

-irregular when young, symmetrical at maturity

-moderate to rapid growth rate

-long-lived

foliage2 foliage Foliage

-opposite

-odd pinnately compound

-10-15" long

-5-11 leaflets

-each leaflet ovate, becoming narrow at the tip

-entire margins

-transparently dotted (like chlorotic spots)

-autumn color is yellow

Flowers

-dioecious (male and female plants)

-in panicles

-not showy

-May to June

Fruit
fruit

-on female plants only

-black, 1/2' drupe, in clusters

-strong odor when bruised

-Oct., persistent into winter

Twig
twig

-stout

-light to yellow gray, becoming brown

-lenticels white, apparent

trunk2 trunk Trunk

-bark gray

-deeply fissured, ridged, becoming corklike

-showy

C   U   L   T   U   R   E
 

Culture

-tolerates many types of soils, including compacted ones, but is not as urban tolerant as previously thought; especially with restricted root spaces

-tolerates drought

-pest- and disease-free

-relatively easily transplanted

Hardiness

-zones 4 to 7

Origin

-native to China, Japan

U   S   A   G   E
 

Assets

-good winter character (bark & form)

-pest-free

-tolerates adverse conditions except limited root space

-attracts wildlife (birds feeding on fruit)

Liabilities

-shallow root system

-fruits on female plants may be messy

-may seed itself into the landscape

Function

-shade tree for large areas, parks, golf courses

-has been used as a street tree

-need space for broad spread

Texture

-medium texture in foliage and coarse when bare

-moderate density

S   E   L   E   C   T   I   0   N   S
 

Varieties and Cultivars - Search OSU PlantFacts for additional plants in this species

Alternates

-other trees with showy bark (e.g., Ulmus parvifolia)

-vased-shaped trees (e.g., Zelkova serrata)

 


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