Date Shot/Created
01/01/2026Media Usage Rights/License
Some Rights Reserved
Image
Collage of invasive plants featuring bird vetch, butter-and-eggs, oxeye daisy, and spotted knapweed.
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.