|
 |
Spotted Knapweed (Centaurea biebersteinii) |
|
Centaurea nigra The heavily divided leaves, and the shape of the flower bracts will separate Spotted Knapweed from Black Knapweed, Tyrol Knapweed, and Brown Knapweed.
Centaurea nigrescens The heavily divided leaves, and the shape of the flower bracts will separate Spotted Knapweed from Black Knapweed, Tyrol Knapweed, and Brown Knapweed.
Centaurea jacea The heavily divided leaves, and the shape of the flower bracts will separate Spotted Knapweed from Black Knapweed, Tyrol Knapweed, and Brown Knapweed.
Centaurea scabiosa The flowers of Great Knapweed, although similar, are much larger (at least 2 inches in diameter). Spotted Knapweed (Centaurea biebersteinii) Alien: Native of Europe. Identification: Flower a round head, topped with a ragged spray of pink, lavender, or white florets. Florets commonly lavender on the outside and white inside. Florets with apical half much subdivided. Flower bracts ovate with apex fringed and an apical triangular spine. Stem tough and wiry. Leaves (except upper leaves) divided into an irregular number of lobes or leaflets. Plant 1 to 4 feet in height. Distribution: Throughout most of North America. Habitat: Spotted Knapweed can be a particularly noxious weed and is found in fields, roadsides, pastures, and other disturbed habitats. Flowering period: June to August. Note: Spotted Knapweed has gone under the scientific name Centaurea maculosa. |
Spotted Knapweed (Centaurea biebersteinii)
Similar Species: Black Knapweed (Centaurea nigra) Tyrol Knapweed (Centaurea nigrescens) Brown Knapweed (Centaurea jacea) Great Knapweed (Centaurea scabiosa)
|
Similar Species |
 |
