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Washington State Weeds

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Tree-Of-Heaven

Ailanthus altissima
Family Name:

Simaroubaceae
Class: C
Other Names:

stinking quassia, copal-tree
 Why is it a noxious weed?

It is naturalized throughout Washington. It is a fast growing tree, forming thickets that outcompete native plants. It leaches a variety of allelochemicals into the soil that have demonstrated inhibitory or toxic effects on neighboring plants.

More Information:

 

 

 

 Visit Washington State Noxious Weed Control Board Here