Shrubs of Wisconsin

Rhamnus cathartica L.
European buckthorn
Family: Rhamnaceae
shrub branch leaves fruit twigs bark
 
Rhamnus cathartica can be identified by the small thorns born at the tips of most branches. Leaves are toothed and may be arranged both alternately and oppositely on the same branch. The fruits, similar in appearance to a cherry (but with two or more seeds inside rather than the single seed of cherries), are very dark colored and numerous.

European Buckthorn is a troublesome invasive exotic species. The fruits are eagerly eaten by birds and the seeds are spread widely. When the trees reach maturity they produce abundant fruit and within a few years there are commonly thousands of seedlings around the base of each mature tree. Cut stumps sprout vigorously and usually require treatment with an herbicide, if they are too large to pull out.

See other web sites for methods of control, for example:

The nature conservancy web site

or

Wisconsin DNR

 


known Wisconsin distribution

Acknowledgments

Contact the author