File:163 Centaurea cyanus L.jpg - Wikimedia Commons

Centaurea cyanus - L.

Centaurea cyanus l hi-res stock photography and images - Alamy

Centaurea solstitialis

Responses of different invasive and non-invasive ornamental plants to water stress during seed germination and vegetative growth

Sesquiterpenoids in subtribe Centaureinae (Cass.) Dumort (tribe Cardueae, Asteraceae): Distribution, 13C NMR spectral data and biological properties - ScienceDirect

Frontiers Isolation and Functional Analysis of Genes Involved in Polyacylated Anthocyanin Biosynthesis in Blue Senecio cruentus

Centaurea cyanus illustration hi-res stock photography and images - Alamy

File:Vincent Van Gogh - Wheatfield With Cornflowers - Google Art Project.jpg - Wikipedia

File:Blåklint (Centaurea cyanus) 03314.jpg - Wikimedia Commons

File:Centaurea-cyanus.JPG - Wikimedia Commons