Species Information

• Texas blueweed
• Helianthus ciliaris DC.
• USDA Symbol: HECI
• Oregon Noxious Weed Designation: A
• Pictures

ALERT: PLEASE CALL 1-866-INVADER IF YOU SUSPECT YOU HAVE FOUND THIS SPECIES

Identification: Perennial; blooms in mid summer. Grows 1 to 2 feet tall. Stems arise from woody, creeping roots. Leaves mostly opposite, narrow to broadly lance-shaped, margins wavy, often with hairs. Flowerheads comprised of yellow outer (ray) flowers, and reddish to dark purple inner (disk) flowers. This species is not yet known to occur in Oregon.

Impacts: This plant is native to the southwestern U.S. and can be found in both cropland and disturbed areas. It is unpalatable to livestock and severely reduces crop yield in some regions. Because of its competitive nature and persistent growth, it poses the threat of becoming the dominant plant in cultivated fields it has invaded.

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 Texas Blueweed Distribution

Links:

USDA Plants Database information on Texas blueweed

GRIN Database information on Texas blueweed

Oregon Department of Agriculture information on Texas blueweed