Acroptilon repens

Acroptilon repens

Acroptilon repens (L.) DC.
Engl.: hardheads, Russian knapweed, blueweed, creeping knapweed, Turkestan thistle.
Deu.: Federblume.
Fran.: centaurée de Russie.
Bot. syn.: Centaurea picris Pall. ex Willd., Centaurea repens L.

I have no articles for this botanical term, but there might be some for the next level down (if found).