Invasive Phragmites is a non native plant. It is an aggressive growing grass that commonly is along shorelines and roadsides.
Above picture is of Native inflorescence on the right and invasive inflorescence on the left and 18-24" taller. Image from Isanti County Ag. Inspector early detection survey 2021.
Helpful links:
Isanti County Phragmites Information
Research on Phragmites by the Minnesota Aquatic Invasive Species Research Center