smooth distaff thistle (Carthamus baeticus)
ODA rating: A
Description
Winter annual; flowers July to August. Grows up to four feet tall. Very similar to woolly distaff thistle except that it has a smaller pappus, is less hairy, and the seedling leaves are more deeply lobed.
Impacts
Plants are highly competitive with cereal crops and desirable rangeland species. Because of their spiny nature, distaff thistles can injure the eyes and mouths of livestock forced to graze within dense populations of the weeds.
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 Images courtesy of California Dept. of Food and Ag. |
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Distribution in Oregon
This species is not yet known to occur in Oregon.
Biological controls
Biological control agents are not used on "A" listed weeds in Oregon. If this weed is found in the state it will be managed for eradication or containment.
Informational links
WeedMapper
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