Alberta Invasive Plant Identification Guide
Alberta Invasive Plant Identification Guide
Alberta Invasive Plant Identification Guide
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Montana State University <strong>Invasive</strong> <strong>Plant</strong> <strong>Identification</strong> <strong>Guide</strong><br />
Knapweed, Russian<br />
Acroptilon repens, Asteraceae (Sunflower Family)<br />
Category: Prohibited Noxious<br />
Montana State University <strong>Invasive</strong> <strong>Plant</strong> <strong>Identification</strong> <strong>Guide</strong><br />
• Information: Native to Eurasia, forms dense, long lived stands.<br />
• Life cycle: Perennial.<br />
• Root: Rhizomatous with black, bark-like Covering.<br />
• Leaves: Basal leaves toothed, covered with fine hairs, grayish-green.<br />
Lower stem leaves deeply lobed, 5-10cm long; upper stem leaves narrow,<br />
toothed, and up to 6cm long.<br />
• Stems: One or more stems up to 90cm tall.<br />
• Flower: One purple flower head per branch tip. Bracts rounded with papery<br />
tips.<br />
• Seed/Fruit: Oval, grey or ivory with long white bristles.<br />
• Toxic: Horses.<br />
• Control: Long term, hand pick, chemical control late in the season.<br />
http://www.invasiveplants.ab.ca/Downloads/FS-RussianKnapweed.pdf<br />
33<br />
Montana State University <strong>Invasive</strong> <strong>Plant</strong> <strong>Identification</strong> <strong>Guide</strong>
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