Eupatorium compositifolium

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Yankeeweed

Secure (NatureServe)[1]
Scientific classification edit
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]

Eupatorium compositifolium commonly called Yankeeweed is a North American herbaceous perennial plant in sunflower family native to the southern United States (from North Carolina to Florida and Texas).[3][4] 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 metres (20-80 inches) tall.[5]

It is closely related to Eupatorium capillifolium and Eupatorium leptophyllum and some authors consider all of them to be varieties of E. capillifolium.[6] However, E. compositifolium is not as tall as E. capillifolium and is found in drier areas.[7]

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.[8]

References[edit]

  1. ^ "Eupatorium compositifolium". NatureServe Explorer. NatureServe. Retrieved 2010-09-12.
  2. ^ The Plant List, Eupatorium compositifolium Walter
  3. ^ "Eupatorium compositifolium". Flora of North America.
  4. ^ Biota of North America Program 2014 county distribution map
  5. ^ "Eupatorium". Flora of North America.
  6. ^ "Eupatorium capillifolium". Fire Effects Information System. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Fire Sciences Laboratory. Retrieved 2008-08-06.
  7. ^ 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. JSTOR 4045284.
  8. ^ 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. JSTOR 3986818.