Centaurea nigrescens
Centaurea nigrescens (Tyrol knapweed, short-fringed knapweed or Tyrol thistle) 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).
| Centaurea nigrescens | |
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| Tyrol Thistle | |
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| Species: | C. nigrescens |
| Binomial name | |
| Centaurea nigrescens Willd. | |
| Synonyms | |
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Centaurea dubia Suter | |
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