Diffuse Knapweed (Centaurea diffusa)
2B, widespread in Montana
Quick ID
- Ball-shaped appearance
- Stems, leaves and flower head bracts covered in hairs
- A single flower head for each branch
- White to light purple flowers
- Height of one to three feet
Diffuse Knapweed
Video Information
Weed Images
Weed Specifications
| Type | Information |
|---|---|
| Toxicity | Non-toxic |
| Best Management Practices | Prevent plant from flowering and going to seed; integrated management using mechanical, cultural, chemical. and biological methods is recommended. |
| Habitat | Common in disturbed habitats and overgrazed or poorly managed pastures. |
| Root | Deep taproot. |
| Leaves | Lower leaves deeply lobed, upper leaves linear. |
| Lifespan | Annual, biennial or short-lived perennial. |
| Similar Looking Plants | Native purple asters, other knapweeds. |
| Important Information | Spreads only by seed; found at elevations up to 7,000 feet. |
