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Species
Information
- smooth
distaff thistle
- Carthamus
lanatus L.
ssp.
baeticus (Boiss.
& Reut.) Nyman
- USDA
Symbol: CALAB2
- Oregon
Noxious Weed Designation: A
- Pictures
ALERT: PLEASE CALL 1-866-INVADER IF YOU SUSPECT YOU HAVE FOUND THIS SPECIES
Identification:
Winter annual; flowers July to August. Grows to 3 1/2 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. This species is not yet known to occur in Oregon.
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.
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.
Oregon
Maps of Smooth Distaff Thistle Distribution
Links:
USDA
Plants Database information on smooth distaff thistle
GRIN
Database information on smooth distaff thistle
Oregon Department
of Agriculture information on smooth distaff thistle
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