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).
Andika dalili au ugonjwa na usome juu ya mimea ambayo inaweza kusaidia, chapa mimea na uone magonjwa na dalili ambazo hutumiwa dhidi yake.
* Habari zote zinategemea utafiti wa kisayansi uliochapishwa