Prepared by Jennifer L. D’Appollonio, Assistant Scientist, University of Maine, Orono, ME 04469. March 2011.
Scientific name: Hieracium aurantiacum L.
Common name(s): orange hawkweed, tawny hawkweed
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-leaves are basal covered in trichomes
-10-36 inches tall
-spreads through stolons
-roots are shallow and fibrous
-generally flowers May to July in ME
-generally fruits July, August in ME
-visited by a variety of insects, including bees and butterflies
-leaves are nutritious but trichomes limit herbivory
-maintain the integrity of the native plant community is more effective than managing solely to control
- avoid building roads where you don’t want this weed
– Physical disturbance by machinery may spread orange hawkweed across fields
-disturbances such as activity by livestock and wildlife may enhance its spread
– Hand removal from lawns is more effective if used in conjunction with fertilizer
-Herbicides are effective in gaining initial control but they are rarely a r long-term solution to management
Hansen, R.W., S.B. Hansen and E.A. Osgood. 1991. Reproductive phenologies of selected flowering plants in eastern Maine forests. ME Agric. Exp. Station Tech. Bull. 143. 17 pp.
Heinrich, B. 1976. Flowering phenologies: Bog, woodland, and disturbed habitats. Ecology. 57(5):890-899.
U.S. Forest Service. “Hieracium Aurantiacum.” Fire Effects Information System (FEIS), USDA, 2020, www.fs.fed.us/database/feis/plants/forb/hieaur/all.html.