Eupatorium compositifolium, commonly called yankeeweed[3] and coastal dog fennel,[4][5] is a North American herbaceous perennial plant in the family Asteraceae native to the southern United States (from North Carolina to Florida and Texas).[6] Like other members of the genus Eupatorium it has inflorescences containing a large number of small, white flower heads, each with 5 disc florets but no ray florets. The plant is 0.5 to 2 meters (20-80 inches) tall.[7] Flowers bloom August to October. Its habitats include sand dunes, disturbed areas, and flat-woods.[3]
| Yankeeweed | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Clade: | Asterids |
| Order: | Asterales |
| Family: | Asteraceae |
| Genus: | Eupatorium |
| Species: | E. compositifolium
|
| Binomial name | |
| Eupatorium compositifolium Walter 1788
| |
| Synonyms[2] | |
|
Synonymy
| |
It is closely related to Eupatorium capillifolium and Eupatorium leptophyllum and some authors consider all of them to be varieties of E. capillifolium.[8] However, E. compositifolium is not as tall as E. capillifolium and is found in drier areas.[9]
Because it is not grazed by livestock, and mostly not eaten by wildlife, it is considered undesirable in places like pastures and controlled by means such as herbicides.[10]
References
edit- ^ "Eupatorium compositifolium". NatureServe Explorer. NatureServe. Retrieved 2010-09-12.[permanent dead link]
- ^ The Plant List, Eupatorium compositifolium Walter
- ^ a b "Eupatorium compositifolium". Flora of North America.
- ^ "Eupatorium compositifolium" at Vascular Plants of North Carolina. Retrieved 5 January 2024.
- ^ B. R. Keener et al. "Eupatorium compositifolium" at Alabama Plant Atlas. Retrieved 5 January 2024.
- ^ Biota of North America Program 2014 county distribution map
- ^ "Eupatorium". Flora of North America.
- ^ "Eupatorium capillifolium". Fire Effects Information System. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. Retrieved 2008-08-06.
- ^ Gregory E. MacDonald, Barry J. Brecke and Donn G. Shilling (Jul–Sep 1992). "Factors Affecting Germination of Dogfennel (Eupatorium capillifolium) and Yankeeweed (Eupatorium compositifolium)". Weed Science. 40 (3): 424–428. doi:10.1017/S0043174500051857. JSTOR 4045284.
- ^ Robert E. Meyer and Rodney W. Bovey (Jan–Mar 1991). "Response of Yankeeweed (Eupatorium compositifolium) and Associated Pasture Plants to Herbicides". Weed Technology. 5 (1): 214–217. doi:10.1017/S0890037X00033558. JSTOR 3986818.
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