orange hawkweed USDA PLANTS Symbol: HIAU
U.S. Nativity: Exotic
Habit: Forbs/Herbs
Hieracium aurantiacum L.
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Taxonomic Rank: Magnoliopsida: Asterales: Asteraceae
Native Range: Europe (BAIL);
Appearance
Hieracium aurantiacum is a perennial plant that is 11.8-23.6 in. (30-60 cm) tall and produces a milky sap.
Foliage
Leaves are mostly basal, elliptical, 2-8 in. (5-20 cm) long, 0.4-1.2 in. (1-3 cm) wide and covered with short, stiff, black hairs. The stems can grow up to 12 in. (30.5 m) tall.
Flowers
Flowers appear in compact cluster of 5 or more dandelion-like flowers on short hairy stalks at the top of the plant. They are 0.75-1 in. (1.9-2.5 cm) across, orange to red, have square-edged petals and appear in May to June on leafless flower stalks.
Fruit
Fruit is a dark seed with a tuft of white hair to be carried in the wind. The plant can spread by seeds, stolons, and rhizomes.
Ecological Threat
Hieracium aurantiacum is usually found in sunny areas and occurs in disturbed areas such as roadsides, gravel pits, meadows, and pastures. It is native to Europe.
Identification, Biology, Control and Management Resources
EDDMapS Distribution:
This map is incomplete and is based only on current site and county level reports made by experts and records obtained from USDA Plants Database. For more information, visit www.eddmaps.org 		 


State List
This map identifies those states that list this species on their invasive species list or law.
U.S. National Parks where reported invasive:
Great Smoky Mountains National Park (North Carolina & Tennessee)
Rocky Mountains National Park (Colorado)
Yellowstone National Park (Wyoming)


Invasive Listing Sources: