Alberta Invasive Plant Identification Guide
Alberta Invasive Plant Identification Guide
Alberta Invasive Plant Identification Guide
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Puncturevine<br />
Tribulus terrestris, Zygophyllaceae (Caltrop Family)<br />
Category: Prohibited Noxious<br />
• Information: Introduced from the Mediterranean and Africa, spread in<br />
sheep wool.<br />
• Life Cycle: Perennial, summer annual in colder climates.<br />
• Root: Woody taproot.<br />
• Leaves: Opposite, 8-16 leaflets, hairy, pinnatley compound, leaflets less<br />
than 1cm wide.<br />
• Stems: Branched, hairy stems radiate from the crown, prostrate (on the<br />
ground) from 10cm to over 1m long.<br />
• Flower: Yellow, 5 petals, 4-10mm wide.<br />
• Seed/Fruits: Pod, 2-3 sharp spines(10mmlong) 4-5 single seeded nutlets,<br />
hard.<br />
• Toxicity: Poisonous to livestock.<br />
• Control: Hand pick, chemical.<br />
Richard Old, XID Services, Inc., Bugwood.org<br />
41<br />
Steve Dewey, Utah State University, Bugwood.org Utah State University Archive, Utah State University, Bugwood.org