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Tyrol Knapweed (Centaurea nigrescens) |
Color Photograph: Photographer Unknown
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Centaurea nigra Tyrol Knapweed might be mistaken for Black Knapweed. However the dark apices of the flower bracts do not conceal their paler bases giving the flower head a spotted appearance.
Centaurea bierbersteinii The leaves of Spotted Knapweed are highly divided, particularly the basal leaves. Tyrol Knapweed (Centaurea nigrescens) Alien: Native of Europe. Identification: Flower base round to globular with an apical spray of pink to rose colored florets. Outer florets enlarged in size into a ring of "rays". Bracts of flower head with a dark apical portion with an outer margin of spines. Dark portion of bract does not conceal paler part giving the base a spotted appearance. Upper leaves linear, elongate, not subdivided. Lower leaves not subdivided, but with a few irregular teeth. Plant 1 to 3 feet in height. Distribution: Throughout most of eastern North America except for the southeastern United States. Also found in the Pacific Northwest. Habitat: Tyrol Knapweed is found in a variety of disturbed habitats including fields, empty lots, and roadsides. Flowering period: June to September. |
Tyrol Knapweed (Centaurea nigrescens)
Similar Species: Black Knapweed (Centaurea nigra) Spotted Knapweed (Centaurea bierbersteinii)
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Similar Species |
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