Jump to content

Helenium thurberi

From Wikipedia, the free encyclopedia

Helenium thurberi

Apparently Secure  (NatureServe)[1]
Scientific classification Edit this classification
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Asterids
Order: Asterales
Family: Asteraceae
Genus: Helenium
Species:
H. thurberi
Binomial name
Helenium thurberi
A.Gray 1883

Helenium thurberi is a North American plant in the sunflower family, commonly known as Thurber's sneezeweed.[2] It is native to Mexico (Baja California Sur, Sinaloa, Nayarit, Chihuahua) and the southwestern United States (Arizona).[3][4]

Helenium thurberi is an annual herb up to 100 cm (39.5 in) tall, with small wings running down the sides of the stems. Leaves are lance-shaped. One plant can produce up to 120 flower heads, in a branching array. Each head has an egg-shaped or conical disc that may contain 500 or more minuscule disc flowers each 1.0–1.3 mm (0.039–0.051 in) across, each yellow toward the bottom but brown or reddish-brown toward the tip. There are no ray flowers.[2]

References

[edit]
  1. ^ "NatureServe Explorer 2.0". explorer.natureserve.org. Retrieved 15 May 2023.
  2. ^ a b Flora of North America, Helenium thurberi A. Gray, 1883. Thurber’s sneezeweed
  3. ^ Turner, B. L. 2013. The comps of Mexico. A systematic account of the family Asteraceae (chapter 11: tribe Helenieae). Phytologia Memoirs 16: 1–100
  4. ^ Biota of North America Program 2014 county distribution map