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Centaurea - Wikipedia, the free encyclopedia
Common names for different species include star- thistle, cornflower, knapweed and bluet. Some species are cultivated as ornamental plants in gardens.
http://en.wikipedia.org/wiki/Knapweed

knapweed - definition of knapweed by the Free Online Dictionary ...
knap·weed   (n p w d) n. Any of various thistles of the genus Centaurea, having variously colored flowers grouped in a head with a spiny involucre. [Middle English knopwed: knop ...
http://www.thefreedictionary.com/knapweed

Diffuse knapweed - Wikipedia, the free encyclopedia
Diffuse Knapweed (Centaurea diffusa), also known as white knapweed, is a member of the Genus Centaurea in the Family Asteraceae. It is native to Asia Minor (Turkey, Syria), the ...
http://en.wikipedia.org/wiki/Diffuse_knapweed

Spotted Knapweed
Introduction, Description, Prevention, Management, Pasture and Rangeland, Small Infestations, Fallow
http://www.ag.ndsu.edu/pubs/plantsci/weeds/w842w.htm

knapweed - Definition of knapweed at Your Dictionary
any of several weedy plants (genus Centaurea) of the composite family; esp., a hardy perennial (C. nigra) with heads of rose-purple flowers
http://www.yourdictionary.com/knapweed

knapweed - definition of knapweed in the Medical dictionary - by the ...
knapweed. Russian knapweed (Acroptilon repens). See centaurea.
http://medical-dictionary.thefreedictionary.com/knapweed

knapweed - Hutchinson encyclopedia article about knapweed
knapweed. Any of several weedy plants belonging to the daisy family. In the common knapweed (C. nigra), also known as a hardhead, the hard, dark buds break open at the top into ...
http://encyclopedia.farlex.com/knapweed

Paghat's Garden: Knapweed
Random stuff about Paghat the Ratgirl's gardens. Knapweed Invaders "A good garden may have some weeds." -Thomas Fuller (1608-1661)
http://www.paghat.com/knapweed.html

Black Knapweed (Centaurea nigra) (Nox)
Victorian Resources Online ... Common name: Black knapweed, common knapweed, lesser knapweed: Status: State Prohibited Weed.
http://www.dpi.vic.gov.au/dpi/vro/vrosite.nsf/pages/weeds_herbs_perenn

Black Knapweed - Southern Tablelands and South Coast Noxious Plants ...
family Asteraceae status Black knapweed (Centaurea nigra) is listed as noxious in category 1 (Local Control Authorities must be notified of its presence and the plants must be ...
http://www.southeastweeds.org.au/index.pl?page=93

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