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Species
Information
- spiny
cocklebur
- Xanthium
spinosum L.
- USDA
Symbol: XASP2
- Oregon
Noxious Weed Designation: B
- Pictures
Identification: Annual; blooms in summer. Grows 4-5 ft tall. Leaves covered with short white hairs, white-veined above, 1 to 3 inches and have 2 short lobes and a 3-forked spine at the junction with the stem. Male flowers uppermost and clustered. Female flowers below male flowers and form bur which bears a beak with hooked bristles.
Impacts: Spiney cocklebur is most frequently found in highly disturbed waste areas and barnyards. It surrounds many small reservoirs in Oregon. The burrs of spiny cocklebur can become tangled in the hide or wool of livestock adding to the cost of the final woolen product. It is moderately competative and is a nuisance in hand-harvested crops. The seeds and seedlings are poisonous. The symptoms are anorexia, depression, nausea, and prostration. Death may occur in a few hours to three days after the symptoms are first noted.
Biological
Controls: No approved biological control agent is available.
Oregon
Maps of Spiny Cocklebur Distribution
Links:
USDA
Plants Database information on spiny cocklebur
GRIN
Database information on spiny cocklebur
Oregon Department
of Agriculture information on spiny cocklebur
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