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Great Knapweed (Centaurea scabiosa) |
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Centaurea beibersteinii Great Knapweed is similar to Spotted Knapweed. However the flower heads of Great Knapweed are much larger (2 inches) than those of Spotted Knapweed (1 inch). The stem of Spotted Knapweed is smooth, wiry, not grooved, and not swollen at its junction with the flower head. Great Knapweed (Centaurea scabiosa) Alien: Native of Europe. Identification: Flower a large (2 inches in diameter) round bulb with an apical spray of pink to dark lavender florets. Apical portion of florets divided. Bracts of flower head with apical half rimmed with long spines. Stem downy, grooved, swollen near junction with flower head. Leaves heavily subdivided. Plant 1 to 2 feet in height. Distribution: Southeastern Canada, southward to Iowa and Ohio. Also found in the northern Rocky Mountain states. Habitat: Great Knapweed in a weed found in disturbed habitats such as roadsides, pastures, and fields. Flowering period: July to September. |
Great Knapweed (Centaurea scabiosa)
Similar Species: Spotted Knapweed (Centaurea biebersteinii)
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Similar Species |
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