Alberta Invasive Plant Identification Guide
Alberta Invasive Plant Identification Guide
Alberta Invasive Plant Identification Guide
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Starthistle, Yellow<br />
Centaurea solstitialis, Asteraceae (Sunflower Family)<br />
Category: Prohibited Noxious<br />
Montana State University <strong>Invasive</strong> <strong>Plant</strong> <strong>Identification</strong> <strong>Guide</strong><br />
• Life cycle: Annual.<br />
• Root: Taproot.<br />
• Leaves: Rosette leaves are deeply lobed with pointed tip. Stem leaves are<br />
vertical, flat extensions along the stem and covered with cottony hairs.<br />
• Stems: Up to 1.5m tall, rigid.<br />
• Flower: One yellow flower head per branch. Sharp, straw-colored spines<br />
up to 5mm long radiate from the bracts. Meter seed dispersal, a cottony tuft<br />
remains on stem.<br />
• Seed/Fruit: Light to dark-colored with or without bristles.<br />
• Toxic: Horses.<br />
• Control: Long term, hand pick, chemical before seed set.<br />
Montana State University <strong>Invasive</strong> <strong>Plant</strong> <strong>Identification</strong> <strong>Guide</strong><br />
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Montana State University <strong>Invasive</strong> <strong>Plant</strong> <strong>Identification</strong> <strong>Guide</strong> Montana State University <strong>Invasive</strong> <strong>Plant</strong> <strong>Identification</strong> <strong>Guide</strong>
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