# Helenium thurberi

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Species of flowering plant

Helenium thurberi Conservation status Apparently Secure (NatureServe)[1] Scientific classification Kingdom: Plantae Clade: Embryophytes Clade: Tracheophytes Clade: Spermatophytes 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](/source/Plant) in the [sunflower family](/source/Asteraceae), commonly known as **Thurber's sneezeweed**.[2] It is native to Mexico ([Baja California Sur](/source/Baja_California_Sur), [Sinaloa](/source/Sinaloa), [Nayarit](/source/Nayarit), [Chihuahua](/source/Chihuahua_(state))) 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](/source/Leaf_shape). One plant can produce up to 120 [flower heads](/source/Flower_heads), in a branching array. Each head has an egg-shaped or conical disc that may contain 500 or more minuscule [disc flowers](/source/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](/source/Ray_flowers).[2]

## References

1. **[^](#cite_ref-1)** ["NatureServe Explorer 2.0"](https://explorer.natureserve.org/Taxon/ELEMENT_GLOBAL.2.142012/Helenium_thurberi). *explorer.natureserve.org*. Retrieved 15 May 2023.

1. ^ [***a***](#cite_ref-iiiiiii_2-0) [***b***](#cite_ref-iiiiiii_2-1) [Flora of North America, *Helenium thurberi* A. Gray, 1883. Thurber’s sneezeweed](http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066859)

1. **[^](#cite_ref-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

1. **[^](#cite_ref-4)** [Biota of North America Program 2014 county distribution map](http://bonap.net/MapGallery/County/Helenium%20thurberi.png)

Taxon identifiers Helenium thurberi Wikidata: Q15559459 Wikispecies: Helenium thurberi CoL: 3K4NP EoL: 595734 FNA: 250066859 GBIF: 5401859 GRIN: 455440 iNaturalist: 163592 IPNI: 211918-1 IRMNG: 10589065 ITIS: 36022 NatureServe: 2.142012 NCBI: 2691862 Open Tree of Life: 3900011 Plant List: gcc-93945 PLANTS: HETH POWO: urn:lsid:ipni.org:names:211918-1 Tropicos: 2710372 WFO: wfo-0000133124 WoRMS: 1100706

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Adapted from the Wikipedia article [Helenium thurberi](https://en.wikipedia.org/wiki/Helenium_thurberi) by Wikipedia contributors ([contributor history](https://en.wikipedia.org/wiki/Helenium_thurberi?action=history)). Available under [Creative Commons Attribution-ShareAlike 4.0 International](https://creativecommons.org/licenses/by-sa/4.0/). Changes may have been made.