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Species
Information
- puncturevine
- Tribulus
terrestris L.
- USDA
Symbol: TRTE
- Oregon
Noxious Weed Designation: B
- Pictures
Identification:
Annual; blooms July to October. Trailing; forms dense mats 4 ft across. Leaves opposite, hairy, divided into 4 to 8 pairs of leaflets, each about 1/2 in long. Flowers yellow, 1/2 in wide with five petals, borne in the leaf axil. Fruits consist of 5 sections which, at maturity, break into tack-like structures with sharp spines. Each section contains 2 to 4 seeds.
Impacts: Puncturevine infests pastures, fields, ditches and roadsides where it forms dense mats of small yellow flowers. The heavily spined seeds are easily spread by animals, humans, and vehicles. Puncturevine seeds are very painful to step on and easily punture bicycle tires or light summer footware.
Biological
Controls: Two biocontrol agents, a seed weevil and a stem weevil, are approved for release and are established in Oregon.
Oregon
Maps of Puncturevine Distribution
Links:
USDA
Plants Database information on puncturevine
GRIN
Database information on puncturevine
Oregon Department
of Agriculture information on puncturevine
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