Idaho Weed Awareness Campaign
Home What's New Virtual Field Guide Network Center Background Site Index

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

Meadow Hawkweed (Hieracium caespitosum)  

Closeup of Meadow Hawkweed flowers.
Closeup of Meadow Hawkweed flowers.

Meadow or yellow 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. Meadow 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, Meadow 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)

Meadow Hawkweed rosettes.
Meadow Hawkweed rosettes.
Photo Courtesy of Kootenai County Weed Control

Other Web Resource Links

All content on this web site is licensed under a Creative Commons License.