Alberta Invasive Plant Identification Guide
Alberta Invasive Plant Identification Guide
Alberta Invasive Plant Identification Guide
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Ragwort, Tansy<br />
Senecio jacobaea, Asteraceae (Sunflower Family)<br />
Category: Prohibited Noxious<br />
Montana State University <strong>Invasive</strong> <strong>Plant</strong> <strong>Identification</strong> <strong>Guide</strong><br />
http://www.co.stevens.wa.us/weedboard/image_weeds/tr2.jpg<br />
• Information: Native to Eurasia, prefers dry open areas.<br />
•Life Cycle: Biennial or short-lived perennial.<br />
•Root: Taproot.<br />
•Leaves: Rosette has 10 - 20 leaves with web-like hairs. Basal leaves 5cm-<br />
25cm long, lobed into leaflets and leaflets lobed again. Stem leaves alternate,<br />
evenly distributed, lower leaves larger, strong odour when crushed.<br />
•Stems: Commonly 30-90cm tall but up to 1.8m Several or solitary stems<br />
may branch near the terminal inflorescence. Stems and leaf stalks often<br />
purplish and have cobwebby hairs.<br />
•Flower: Daisy-like flower heads, yellow petals, yellow center, less than<br />
2.5cm diameter, clustered on terminal stem.<br />
•Seed/Fruit: Tiny and tipped by hair-like plumes.<br />
•Toxic: Horses, cattle, sheep, goats, humans.<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>
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