SafePlants

No images found for this plant ID: 9329.

Ensure images are uploaded to the Media Library and tagged with "9329" in the "plant_image_tag" taxonomy.

Safe for Children?

✅ Safe: 0
❓ Neutral: 0
❌ Unsafe: 0

Safe for Dogs?

✅ Safe: 0
❓ Neutral: 0
❌ Unsafe: 0

Safe for Cats?

✅ Safe: 0
❓ Neutral: 0
❌ Unsafe: 0

Safe for Reptiles?

✅ Safe: 0
❓ Neutral: 0
❌ Unsafe: 0

bighead knapweed

Scientific Name: Centaurea macrocephala

Family: Asteraceae

Category: Dicot

Growth: Forb/herb

Duration: Perennial

Other Names:

       

Bighead Knapweed (Centaurea macrocephala)

Bighead Knapweed, scientifically known as Centaurea macrocephala, is a striking plant known for its large yellow flowers. It has gained attention both for its ornamental qualities and its classification as a noxious weed in certain regions.

Considerations for Pets

  • Some common names include "golden thistle."

Considerations for Children

  • Some common names include "golden thistle."

Common Names

  • Bighead Knapweed
  • Yellow Hardhead
  • Giant Knapweed
  • Armenian Basketflower
  • Lemon Fluff Knapweed
  • Globe Centaurea
  • Golden Thistle
  • Yellow Fluff Knapweed
  • Great Golden Knapweed
  • Giant Yellow Knapweed
  • Cornflower

Taxonomy and Nomenclature

  • Scientific Name: Centaurea macrocephala Puschk. ex Willd.
  • Family: Asteraceae (Sunflower Family)
  • Synonyms:
    • Centaurea macrocephala (Grossgeimia)
    • Big yellow centaurea
    • Big-headed knapweed

Distribution and Habitat

  • Native to Eastern Europe.
  • Introduced to North America as an ornamental garden plant.
  • Observed in King County and Pierce County, Washington State, and Alberta, Canada.

Ecological Role

  • Classified as a noxious weed in some areas, including King County, Washington.
  • Considered an invasive species.

Morphological Characteristics

  • A tall perennial herb, reaching heights of 50-170 cm (approximately 19 inches to 5 feet).
  • Characterized by large, single, 1-3 inch wide yellow flower heads.
  • Erect, unbranched, and leafy stems.
  • Grows from sturdy root stock.

Uses

  • Used in perennial flower beds.
  • Used as cut flowers.
  • Can be preserved for use in dry bouquets.

Interactions with Other Organisms

  • Member of the Asteraceae or sunflower family.

Further Information

  • USDA PLANTS Symbol: CEMA9
  • Washington State University Extension Service: PNW Extension Bulletin Knapweeds of Washington, EB1393.
  • Pierce County Noxious Weed Control Board