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VIRTUAL FIELD GUIDE >> Noxious Weed List >> Orange Hawkweed

Orange Hawkweed (Hieracium aurantiacum)

Orange Hawkweed flowers.
Orange Hawkweed flowers.

Orange hawkweed is a perennial with a shallow root system. Leaves are hairy, up to 6 inches long, and found at the base of the flower. Each rosette is capable of producing between 10 and 30 flowering stems, and each stem is capable of producing 5 to 30 flowering heads. A single flower head is capable of producing between 12 and 50 tiny black seeds. Orange hawkweed has a shallow root system and underground creeping stems called rhizomes. New plants can arise from buds on the rhizomes and plants can develop several creeping stems (like strawberries) that are also capable of producing new plants.

Introduced from Europe as an ornamental plant, Orange hawkweed can be found in moist grasslands, forest meadows, abandoned fields, clear cuts, roadsides, established lawns and gardens. Once introduced into an area, it can quickly form dense patches. If not controlled, these patches can expand into large areas and displace desired native and forage species.

Hawkweeds are members of the sunflower family (Asteraceae) and are closely related to dandelions. Bloom time is from late May to mid June with seed set in August. Hawkweeds reproduce by seeds, which blow in the wind, and by underground and above ground runners. (From Kootenai County Noxious Weed Control Department)

Orange Hawkweed rosettes.
Orange Hawkweed rosettes.

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