Centaurea is a genus of flowering plants in the family Asteraceae, commonly known as knapweeds or cornflowers. This diverse group includes over 500 species, which can be found in various habitats across Europe, Asia, and North America. Many species are characterized by their vibrant flowers, which can be blue, purple, pink, or white, and are often attractive to pollinators. Some Centaurea species are considered invasive in certain regions, outcompeting native plants and disrupting local ecosystems. However, others are valued for their ornamental qualities and are cultivated in gardens. The genus also has historical significance, as some species have been used in traditional medicine.