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- Centaurea nigra - Wikipedia
Centaurea nigra is a species of flowering plant in the family Asteraceae, and is also known as lesser knapweed, common knapweed, black knapweed and bell weed
- Washington State Noxious Weed Control Board
Spotted knapweed is a very aggressive species that can quickly infest large areas Knapweed infestations increase production costs for ranchers, degrade wildlife habitat, decrease plant diversity, increase soil erosion rate and pose wildfire hazards
- Spotted Knapweed | Cornell Weed Identification
Spotted Knapweed (Centaurea maculosa) is a biennial or short-lived perennial that is commonly found throughout the northeast and central-north of the US This weed typical grows on dry, low-fertility soils, and is a problem in New York pastures and disturbed areas
- Common knapweed - The Wildlife Trusts
Common knapweed, also known as 'black knapweed', is a thistle-like plant that can be found on all kinds of grasslands, from roadside verges to woodland rides, clifftops to lawns
- Knapweeds – Renz Weed Science
Knapweeds are herbaceous biennials or perennials Seedlings emerge throughout the growing season and rosettes persist year-round Knapweeds bloom in summer with white to purple flowers As part of the aster family, knapweeds have composite flowers with each flowerhead made up of many tiny florets
- Spotted Knapweed - US Forest Service
Knapweed overwinters as a rosette and resumes growth in early spring Knapweed produces new flower stalks each year and older stalks remain creating a gray cast to the landscape
- Knapweed: Pictures, Flowers, Leaves Identification | Centaurea nigra
Knapweed (Centaurea nigra) is wild, edible and nutritious food Identify knapweed via its pictures, habitat, height, flowers and leaves
- Spotted Knapweed - Native Plants and Ecosystem Services
The pages listed below contain information on how to identify and manage spotted knapweed and the potential to use native plants to supply summer nectar and pollen flows
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