Invasive Plant Details
Back to Full ListBrown Knapweed
Latin Name: Centaurea jacea
Identification
Flower: Pink to purple, thistle-like flower heads that bloom from mid to late summer.
Leaves: Lance-shaped, green, slightly hairy leaves, with basal leaves being larger and more lobed.
Stems: Erect, slightly hairy, and branched, growing up to 1 meter tall.
Growing Environment: Found in meadows, grasslands, pastures, and along roadsides.
Growth Habit: A perennial herb that grows up to 1 meter tall. It forms loose clumps that can spread over time through seed dispersal and vegetative growth and create large monocultures. In situ, it often appears in scattered patches, particularly in open meadows or disturbed areas, where its bright purple flowers are conspicuous.
Impacts on Environment
Impacts: Invasive in some regions, particularly in grasslands and pastures where it can crowd out native species.