Centaurea montana Mountain Cornflower | Another Calgary garden
Centaurea diffusa - Wikipedia
Centaurea – Must Have Perennials
Centaurea jacea (brown knapweed or brownray knapweed) is a species of herbaceous perennial plants in the genus Centaurea grow in the field Stock Photo - Alamy
File:Centaurea pullata canada FlowersCloseup 01May2009 CampodeCalatrava.jpg - Wikipedia