NOT KNOWN TO OCCUR IN OREGON PLEASE CALL 1-866-INVADER IF YOU SUSPECT YOU HAVE FOUND THIS SPECIES
USDA Symbol: HIFL3
ODA rating: A and T
yellow hawkweed risk assessment
Noxious weed listing process
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Image courtesy of G. Russ.
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Perennial; flowers June to July in lower elevations. Grows 10 to 36 inches tall. Leaves hairy, spatula shaped and almost exclusively basal. Flower heads clustered, yellow, 1/2 wide, and number up to 30 per plant. Extensive stolons form dense mats of vegetation. King-devil hawkweed (H. piloselloides), yellow hawkweed (H. floribundum) and meadow hawkweed (H. pratense) are all very similar and difficult to classify. Native hawkweeds have numerous stem leaves, lack stolons and generally have solitary flowers.
These plants produce mats of rosettes that prevent other plants from establishing seedlings. They grow in grassy areas and do not tolerate shade well. They are becoming troublesome weeds in native meadows, prairies, pastures and lawns.
Distribution in Oregon
This plant is not known to occur in Oregon at this time.
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.
Printable yellow hawkweed trifold brochure (pdf)