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Species
Information
- yellow
hawkweed
- Hieracium
×floribundum Wimmer
& Grab.
- USDA
Symbol: HIFL3
- Oregon
Noxious Weed Designation: A,T
- Pictures
ALERT: PLEASE CALL 1-866-INVADER IF YOU SUSPECT YOU HAVE FOUND THIS SPECIES IN OREGON
Identification: 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.
This species is not yet known to occur in Oregon.
Impacts: This species has many of the same growth characteristics of related hawkweed species and can often be found growing with or adjacent to them.
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 Yellow Hawkweed Distribution
Links:
USDA
Plants Database information on yellow hawkweed
GRIN
Database information on yellow hawkweed
Oregon Department
of Agriculture information on yellow hawkweed
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