Alberta Invasive Plant Identification Guide
Alberta Invasive Plant Identification Guide
Alberta Invasive Plant Identification Guide
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Sow thistle, Perennial<br />
Sonchus arvensis, Asteraceae (Sunflower Family)<br />
Category: Noxious<br />
•Information: Introduced from Europe and Asia. Other names include;<br />
Creeping Sow Thistle, and Field Milk Thistle<br />
•Life Cycle: Creeping perennial.<br />
•Root: Creeping rhizomatous root.<br />
•Leaves: Alternate, prickles on the edges, usually on the lower portion of<br />
the plant, milky juice.<br />
•Stems: Hollow stems, branched at the top portion of the plant, milky<br />
juice.<br />
•Flower: Yellow flowers (dandelion-like).<br />
•Seed/Fruits: Small seed, wings (pappus).<br />
•Toxicity:<br />
•Control: Chemical.<br />
Sarah Schumacher, Wheatland County Sarah Schumacher, Wheatland County<br />
71<br />
AIPC Fact sheet http://www.invasiveplants.ab.ca/Downloads/FS-PerennSowthistle.pdf<br />
minidoka.id.us/.../perennial_sowthistle.htm<br />
www.agf.gov.bc.ca/cropprot/weedguid/sowthist.htm<br />
www.invasiveplants.ab.ca/<br />
Sarah Schumacher, Wheatland County<br />
www.forestryimages.org/.../3072x2048/1459591.jpg
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