Centaurea nigrescens

Centaurea nigrescens, the Tyrol knapweed, short-fringed knapweed or Tyrol thistle, is a perennial plant in the genus Centaurea that grows natively in Central and South-eastern Europe (from Southern Germany and Northern Italy to Romania and Bulgaria). It has also been introduced and is now a noxious weed in the Northern United States, Canada, and Southern Australia.^[1] It has purple flowers and it flowers in the summer (June to September).

Centaurea nigrescens
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Eudicots
Clade:	Asterids
Order:	Asterales
Family:	Asteraceae
Genus:	Centaurea
Species:	C. nigrescens
Binomial name
Centaurea nigrescens Willd.
Synonyms
Centaurea dubia Suter