Neha Patil (Editor)

Helenium amarum

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Kingdom
  
Tribe
  
Helenieae

Scientific name
  
Helenium amarum

Rank
  
Species

Order
  
Genus
  
Helenium

Higher classification
  
Helenium

Helenium amarum Helenium amarum

Similar
  
Helenium, Daisy family, Helenium flexuosum, Bidens aristosa, Krigia biflora

Helenium amarum


Helenium amarum is a species of annual herb in the daisy family known by the common names yellowdicks, yellow sneezeweed, fiveleaf sneezeweed, and bitter sneezeweed. It is native to much of the south-central United States (Texas, Oklahoma, Louisiana, New Mexico) and northern Mexico (Chihuahua, Coahuila), and it is present elsewhere in North America, Australia, and the West Indies as an introduced species.

Helenium amarum Helenium amarum

Helenium amarum is a multibranched bushy erect plant reaching 20 to 70 centimeters (8-28 inches) in height and thickly foliated in narrow to threadlike leaves. The tops of stem branches hold inflorescences of many daisy-like flower heads. Each head has a rounded center of sometimes as many as 250 golden yellow disc florets and a fringe of 8-10 usually lighter yellow ray florets which are reflexed away from the center. The fruit is a tiny achene about a millimeter long. This herb is weedy in some areas.

Helenium amarum Helenium amarum picturesPictures of yellowdicks or bitterweed

The plant is somewhat toxic to mammals and insects due to the presence of the lactone tenulin.

Varieties
  • Helenium amarum var. amarum - United States
  • Helenium amarum var. badium Waterf. - Oklahoma, Texas, Chihuahua, Coahuila

  • Helenium amarum Helenium amarum var amarum Wildflowers of Texas

    Helenium amarum wwwbioutexaseducoursesbio406dimagespicsast

    Helenium amarum Helenium amarum var badium Yellowdicks NPIN

    Helenium amarum Encyclopedian Dictionary Bitterweed Helenium amarum

    References

    Helenium amarum Wikipedia