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Spotted Knapweed


Orange Hawkweed

Dalmatian Toadflax

Leafy Spurge


Sulfur cinquefoil

Common Tansy

Additional State Listed Noxious Weeds

orange flowershawkweed patch

Orange Hawkweed

(Hieracium aurantiacum)

Family: AsteraceaeLife cycle: Perennial

Roots: Shallow, fibrous, creeping

Basel rosettes are composed of long, narrow, linear leaves that are covered in small, fine hairs

Flowers: each plant may have 2 to 8 flowers, which can range from 6 to 30 inches tall

Note: Similar plant structure with yellow flowers is known as yellow hawkweed complex.  There are several species with one being a listed noxious weed.  However, identification can be tricky due to their similar characteristics but growing patterns will help identify between species in the field.   

Effective control methods:


Repeated cultivation/digging:  This is effective only on small under-established sites.  Stolons and rhizomes are fibrous but weak so it’s important to remove and contain (then dispose of properly) all ‘root’ looking structures.


Mowing orange hawkweed will NOT control this weed because it reproduces through stolons and rhizomes.  Mowing may reduce the seed bank for a short time but this plant will adapt and begin to produce flowers/seeds at a lower level   

Photos: USDA APHIS PPQ Archive, USDA APHIS PPQ, Bugwood. org

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