Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock () or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
A stand of field sow thistle (yellow flowers; Sonchus arvensis), Canada thistle (purple flowers; Cirsium arvense), and Kentucky bluegrass (grass; Poa pratensis), all of which are non-native and growing near an oil well pad in Mountrail County, ND.
Public Domain.
