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Woolly Distaff Thistle

Carthamus lanatus

Plant Description

Woolly distaff thistle is an erect winter annual with rigid stems. It flowers from July through August. It grows up to 3½ feet tall, has spiny pointed leaves that are alternate. The flower head has many long, sharp leaf-like bracts just below the yellow flowers. The rigid stems with old flower heads and leaves often persist through winter and often longer.

Plant Details

Life Forms
ODA Listing
Soil and Moisture Conditions
Suggested Actions
Shade Preference
Mature Height 3-4'
Distribution Found sporadically along the west coast.
Control Mow to prevent seed heads. Dig out roots or apply herbicides for a more sucessful removal, but must be maintained.
Disposal Methods Remove seed heads and bag. Bag and throw away plants when dug out.
Reproduction and Spread Spread through Waterways and hay crops.
Introduced Discovered in Oregon in1987
Look Alikes Smooth distaff thisthle
Impact Unable to be grazed, this species overtakes grasses and outcompetes more palitable species.
More Info
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