Weeds Australia - Spotted Knapweed (Centaurea stoebe subsp. australis)
Centre for Invasive Species Solutions; Atlas of Living Australia; Australian Government. Department of Agriculture, Water and the Environment.
Centre for Invasive Species Solutions; Atlas of Living Australia; Australian Government. Department of Agriculture, Water and the Environment.
Centre for Invasive Species Solutions; Atlas of Living Australia; Australian Government. Department of Agriculture, Water and the Environment.
Centre for Invasive Species Solutions; Atlas of Living Australia; Australian Government. Department of Agriculture, Water and the Environment.
Centre for Invasive Species Solutions; Atlas of Living Australia; Australian Government. Department of Agriculture, Water and the Environment.
Centre for Invasive Species Solutions; Atlas of Living Australia; Australian Government. Department of Agriculture, Water and the Environment.
Centre for Invasive Species Solutions; Atlas of Living Australia; Australian Government. Department of Agriculture, Water and the Environment.
Centre for Invasive Species Solutions; Atlas of Living Australia; Australian Government. Department of Agriculture, Water and the Environment.
Centre for Invasive Species Solutions; Atlas of Living Australia; Australian Government. Department of Agriculture, Water and the Environment.
Victoria Department of Jobs, Precincts and Regions (Australia). Agriculture.
Victoria Department of Jobs, Precincts and Regions (Australia). Agriculture.
University of Hawaii. College of Tropical Agriculture and Human Resources.
See also: Weeds of Hawaii for more species guides
Colegio de Postgraduados en Ciencias Agrícolas. Mexico.
Special Note: In Spanish
University of Nebraska - Lincoln. Cooperative Extension.
DHHS. Centers for Disease Control and Prevention.
Michigan Department of Natural Resources.
DHHS. Centers for Disease Control and Prevention.
Includes final annual and cumulative maps and data from 1999 to 2024.
Pennsylvania Department of Environmental Protection.
Pacific States Marine Fisheries Commission. Western Aquatic Invasive Species Resource Center.
Pacific States Marine Fisheries Commission.
See the photo gallery for images and video to better understand all the places invasive species can hitch a ride on your boat or trailer.
DOI. United States Geological Survey.