Weed Classifications

Invasive Plants and Weeds of the National Forests and Grasslands in the Southwestern Region

Arizona

Arizona prohibited are noxious (= regulated) weeds prohibited from entry into the state. This includes plants, stolons, rhizomes, cuttings, and seeds.

Arizona regulated are noxious weeds regulated and if found within the state, may be controlled or quarantined to prevent further infestation or contamination. This includes plants, stolons, rhizomes, cuttings, and seeds.

Arizona restricted are noxious weeds restricted and if found within the state, shall be quarantined to prevent further infestation or contamination. This includes plants, stolons, rhizomes, cuttings, and seeds.

New Mexico

New Mexico Class A species are currently not present in New Mexico, or have limited distribution. Preventing new infestations of these species and eradicating existing infestations is the highest priority.

New Mexico Class B species are limited to portions of the state. In areas with severe infestations, management should be designed to contain the infestation and stop any further spread.

New Mexico Class C species are widespread in the state. Management decisions for these species should be determined at the local level, based on feasibility of control and level of infestation.

New Mexico Watch List species are species of concern in the state. These species have the potential to become problematic. More data is needed to determine if these species should be listed. When these species are encountered, please document their location and contact appropriate authorities.

Oklahoma

Oklahoma noxious weeds are plants designated as noxious weeds by the legislature as a public nuisance in all countries across the state.

Texas

Texas noxious plants and invasive plants are defined as plant species that have serious potential to cause economic or ecological harm to the state.