Scientific NameCentaurea jacea
Other Common Names:
Brown knapweed reproduces by seeds. It, like most other knapweeds, has a taproot system which allows it to suck water and nutrients from nearby plants.
The leaves of brown knapweed are egg-shaped or lance shaped. The leaves become smaller as they move up the stem.
Brown knapweed can be distinguished from other knapweeds due to its brachts, which are tan to brown and paper-like at the edges.
Flower Seed Head
The flower heads of brown knapweed are 1 inch to 1 1/4 inch in diameter. They are ray type flowers and most often are magenta in color. The flowers bloom from June to October.
Brown knapweed seeds have tufts on the end and are approximately 1/8 inch long. The seeds are the source of reproduction.
Brown knapweed is found throughout the North East and North Western United States. It originated and is found throughout Europe.
upright and nonwoody
Thorns or Spines
Dominant Flower Color
shorter than leaf
Stem Cross Section
round or oval