Designed to help land managers identify the state- or county-listed noxious weeds. Other species included are those with the most potential to spread within the state or into North Dakota from bordering states. The plant species identified in this guide are considered noxious and/or pose a threat to North Dakota and the Midwest. Eleven of the species included in the guide are currently state-listed noxious weeds in North Dakota and must be controlled statewide. Other weeds have been designated as noxious weeds in one or more counties throughout the state. These weeds are required to be controlled within their listed counties. For ease of identification, state- and county-listed noxious weeds have been designated with icons throughout the guide.