Species Profiles Quiz GSMNP View

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white walnut (Juglans cinerea)
Family: Juglandaceae

 

A table detailing the characteristics of the white walnut

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Form:

This is a small to medium-sized tree ranging from 40-60 ft. in height. It has a spreading crown and often develops a twisted trunk.

Leaves:
 Arrangement: alternate; odd-pinnately compound; 11-19 leaflets

 Shape: oblong-lanceolate

 Margin: serrate

 Texture: rachis is pubescent; leaflets rugose above, pubescent below

Leaves of a white walnut

Bark:

It has light gray smooth bark when young and develops shallowly furrowed with broad ridges when older. The ridges are often flattened with a lighter brown color *.

Bark of a white walnut

Twigs and Buds:

The twigs are stout, lenticels, and have a chambered pith. Terminal buds are elongated and blunt at the tip.

Twig and bud of a white walnut

Flowers and Fruit:

The oblong shaped sticky fruit can be attached individually or in clusters.

Distinguishing Characteristics:

Look for the flattened lighter colored ridges and the different shaped nut to distinguish this species from black walnut.

Range:

It has a large range concentrated in the Central Hardwood Region extending into New England and the southern Lake States. However, very few large populations exist.

Silvics:

It is shade-intolerant and prefers deep moist loams, but can also be found on dry limestone rich sites. It is never found in pure stands.

Ecological and Cultural Importance:

Populations of this species have been severely hindered dying by a canker causing fungus.