Tyrol Knapweed

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Centaurea nigrescens
Tyrol Thistle
Tyrol Thistle
Scientific classification
Kingdom: Plantae
Division: Magnoliophyta
Class: Magnoliopsida
Order: Asterales
Family: Asteraceae
Tribe: Cynareae
Genus: Centaurea
Species: C. nigrescens
Binomial name
Centaurea nigrescens
Willd.

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

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