Orange Hawkweed

orange hawkweed flower
orange hawkweed plant
orange hawkweed habit
orange hawkweed seedling

Orange Hawkweed

Hieracium aurantiacum

Information Sheet (PDF)


Colorado List A - Eradication required in Jefferson County


General

  • Family: Sunflower (Asteraceae)
  • Forms stolons and rhizomes
  • Has been sold as an ornamental but no longer available in Colorado
  • Introduced from Europe
  • Perennial


Common names

  • Devil’s Paintbrush
  • King Devil


Habitat

  • Found between 5,000 to 10,500 feet in pastures, rangelands, roadsides, gravel pits and moist grasslands


Plant


Vegetation

  • Hairy leaves at the base of the plant; occasionally small leaves on stalk
  • Mature plants are 6 to 12 plus inches tall


Roots

  • Also forms stolons
  • Fibrous


Flower

  • Color: Orange
  • Each stem can produce several hundred seeds
  • Multiple flowers at end of stem
  • Season: June to August
  • Size: 3/4 inch across


Seedling

  • Rosettes form in spring and early summer


Reproduction

  • Seeds
  • Stolons


Control


Biological

  • None


Chemical


Cultural

  • Fertilization to promote grass cover
  • Prevention – maintain health of site
  • Re-vegetation of highly disturbed sites


Mechanical

  • Burning - N/A
  • Grazing - Animals will not eat
  • Mowing - Not recommended; plants form a dense mat below mowing height; small fragments easily form new plants 

More Information

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