Bighead Knapweed (Centaurea macrocephala)

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  Credit: Jacob Sturm (?) | scanned from book 31 jan 2009 | License: CC-BY-SA-3.0-migrated GFDL
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  Credit: Maedin Tureaud | Own work | License: CC-BY-SA-3.0
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  Credit: Original uploader was Jeantosti at fr.wikipedia | Originally from fr.wikipedia; description page is/was here. | License: CC-BY-SA-3.0-migrated GFDL
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  Credit: Michael Wilson from York, United Kingdom | originally posted to Flickr as

  Centaurea Macrocephala, or more commonly know as Bighead Knapweed, is a forb/herb (a forb/herb is a non-woody plant that is not a grass) of the genus Centaurea. Its duration is perennial which means it will grow year after year. Centaurea Macrocephala or Bighead Knapweed's floral region is North America US Lower 48, specifically in the states of Idaho, Michigan, Montana, Oregon, Washington and Wisconsin.