Alaska Exotic Plant Management Team

National Park Service
U.S. Department of the Interior

The outwash plain of Exit Glacier in Kenai Fjords.
Contact Us
 
Definitions

Native plants are those that live or grow naturally in a particular region.

Exotic, alien, and non-native plants are plants whose presence in a given area is due to accidental or intentional introduction by humans. The majority of non-native plants are beneficial to society, including staple crops and ornamental plants.

A weed is any plant, native or non-native, whose presence is undesirable to people in a particular time or place.

Naturalized plants are non-native plants that reproduce consistently in their new environment and sustain populations over many life cycles without direct intervention by humans.

Invasive plants are non-native plants that produce viable offspring in large numbers and have the potential to establish and spread in natural areas. Invasive plants often have a negative effect on ecosystems and may cause economic losses or harm to human health.

Noxious weeds are plants that have been defined as undesirable by a legal statute - local, state, and/or federal.