Centaurea diffusa Profile – California Invasive Plant Council
Diffuse knapweed - Invasive Species Council of British Columbia
Washington State Noxious Weed Control Board
Centaurea diffusa (white knapweed): Go Botany
Plantwise Knowledge Bank
Centaurea diffusa (white knapweed): Go Botany
Diffuse Knapweed - Montana Field Guide
Diffuse Knapweed - Montana Field Guide
Centaurea diffusa Lam. - Yaşam Ansiklopedisi
Diffuse knapweed identification and control: Centaurea diffusa - King County, Washington
Centaurea diffusa - Wikipedia
diffuse knapweed (Centaurea diffusa)
File:Centaurea diffusa sl6.jpg - Wikimedia Commons
Centaurea diffusa - Wikipedia
File:Centaurea diffusa sl32.jpg - Wikimedia Commons
Centaurea diffusa) - EcoRegistros
Centaurea diffusa
Centaurea diffusa Profile – California Invasive Plant Council
Centaurea diffusa - Burke Herbarium Image Collection
Centaurea diffusa (white knapweed): Go Botany
Centaurea diffusa Calflora
Diffuse knapweed (Centaurea diffusa) | Fraser Valley Invasive Species Society
Centaurea diffusa - Diffuse knapweed - Zerdali dikeni
Diffuse knapweed — Northern Arizona Invasive Plants
