Alberta Invasive Plant Identification Guide
Alberta Invasive Plant Identification Guide
Alberta Invasive Plant Identification Guide
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Sarah Schumacher, Wheatland County<br />
Knapweed, Hybrid<br />
Centaurea × psammogena, Asteraceae (Sunflower Family)<br />
Category: Prohibited Noxious<br />
All: http://www.centaurea.net/centaurea_xpsamm-Bilder.htm<br />
• Information: Introduced from Eurasia, hybrid of Spotted and Diffuse<br />
knapweeds.<br />
• Life Cycle: Biennial or short lived perennial.<br />
• Root: Woody taproot.<br />
• Leaves: Finely divided, covered with fine hairs.<br />
• Stems: 20-80cm tall.<br />
• Flower: Pink to white.<br />
• Seed/Fruits: Prolific seed producer.<br />
• Toxicity:<br />
+<br />
Knapweed, Spotted Knapweed, Diffuse<br />
Montana State University <strong>Invasive</strong> <strong>Plant</strong> <strong>Identification</strong> <strong>Guide</strong><br />
=<br />
• Control: Long term, hand pick, chemical.<br />
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