What is another word for black knapweed?
Pronunciation: [blˈak nˈapwiːd] (IPA) 
Black knapweed is a type of herbaceous perennial plant that is native to Europe and Asia. It is commonly known by various synonyms such as Centaurea nigra, common knapweed, and hardheads. The plant is characterized by its dark purple or black flowers that bloom from June to August. Black knapweed is often confused with other knapweeds, but can be distinguished by its stem, which is covered with bristly hairs. This plant is often used in traditional medicine for various ailments, including insect bites and stomach problems. Black knapweed can also be used as a natural dye for fabric and other materials.
