WOODY
INVASIVE SPECIES


Woody invasive species harm our riparian areas, livestock production, and outdoor recreation.

Help Montana by learning how to identify and report woody invasive species.

Woody Invasives ID Trifold 

 

Common Buckthorn (Rhamnus cathartica) 

A large shrub or small tree (6-20ft tall) that has deciduous leaves which remain green long into the fall compared to native species. It can develop into dense monocultures, reduce habitat, and outcompete native species.

 Common buckthorn with berries, courtesy of BugwoodCommon Buckthorn Thorn

 

 

Russian Olive (Elaeagnus angustifolia) 

A tall shrub or small tree (up to 26ft tall) wth branches that are orange-brown in color with white-mealy hairs. Readily invades riparian habitat, outcompeting native species and alters the ecosystem. 

Russian Olive courtesy of BugwoodRussian Olive

 

 

Saltcedar (Tamarix chinensis, T. ramosissia)

Wispy shrubby growth form (3-17ft tall) that often occurs in riparian areas. Has short clusters of tiny pink flowers that cover the shrub during the growing season. Crowds out native species and chokes riparian corridors. 

Saltcedar courtesy of BugwoodSaltcedar

Reporting woody invasive species helps us prioritize management across watersheds.

Report on iNaturalist

Contact your local extension agent

Contact your local weed district

 Reporting best practices include clear photos and detailed location information.

 Woody invasive species have broad negative impacts to water quality, wildlife and fisheries habitat, agricultural production, recreation, and property values. Management is a shared responsibility among all land and water users.

Common Buckthorn IPM

 

 

 

 

 

 

 

 

 

 

Common Buckthorn IPM Guide

 

 

 

 

 

 

 

 

 

 

Russian Olive IPM Guide

Saltcedar IPM Guide