1![MEADOW KNAPWEED Centaurea jacea x nigra THREAT: Meadow knapweed is a highly competitive plant, displacing native plant communities and reducing forage for wildlife and livestock. The plant exhibits low palatability and c MEADOW KNAPWEED Centaurea jacea x nigra THREAT: Meadow knapweed is a highly competitive plant, displacing native plant communities and reducing forage for wildlife and livestock. The plant exhibits low palatability and c](https://www.pdfsearch.io/img/523c2366ec90b86931983c8567dc9462.jpg) | Add to Reading ListSource URL: www.co.whatcom.wa.usLanguage: English - Date: 2011-01-26 19:35:04
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2![Brown Knapweed (Centaurea jacea L.) Family: Asteraceae (Compositae) Description: Brown knapweed is a perennial plant with a woody root crown that grows 20 to 48 inches tall, Brown Knapweed (Centaurea jacea L.) Family: Asteraceae (Compositae) Description: Brown knapweed is a perennial plant with a woody root crown that grows 20 to 48 inches tall,](https://www.pdfsearch.io/img/4e46f69e4ec6763b7fd51b87c24167fb.jpg) | Add to Reading ListSource URL: na.fs.fed.usLanguage: English - Date: 2005-01-29 08:35:02
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3![Invasive Plants in Pennsylvania Black, Brown and Spotted Knapweed Centaurea nigra L., C. jacea L. and C. stoebe L. spp. micranthos Photo: Patrick Alexander, www.polyploid.net Invasive Plants in Pennsylvania Black, Brown and Spotted Knapweed Centaurea nigra L., C. jacea L. and C. stoebe L. spp. micranthos Photo: Patrick Alexander, www.polyploid.net](https://www.pdfsearch.io/img/b7ce2259abdf30b1a783bd5d54f1088e.jpg) | Add to Reading ListSource URL: www.dcnr.state.pa.usLanguage: English - Date: 2013-02-04 11:15:58
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4![Brown Knapweed (Centaurea jacea L.) Family: Asteraceae (Compositae) Description: Brown knapweed is a perennial plant with a woody root crown that grows 20 to 48 inches tall, Brown Knapweed (Centaurea jacea L.) Family: Asteraceae (Compositae) Description: Brown knapweed is a perennial plant with a woody root crown that grows 20 to 48 inches tall,](https://www.pdfsearch.io/img/c677f06e75377b2ebb0bbec506b3fe38.jpg) | Add to Reading ListSource URL: www.na.fs.fed.usLanguage: English - Date: 2005-01-29 08:35:02
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