# Helenium arizonicum

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Species of flowering plant

Helenium arizonicum Scientific classification Kingdom: Plantae Clade: Embryophytes Clade: Tracheophytes Clade: Spermatophytes Clade: Angiosperms Clade: Eudicots Clade: Asterids Order: Asterales Family: Asteraceae Genus: Helenium Species: H. arizonicum Binomial name Helenium arizonicum S.F.Blake 1937

***Helenium arizonicum*** is a North American [perennial plant](/source/Perennial_plant) in the [Sunflower Family](/source/Asteraceae), commonly known as **Arizona sneezeweed**.[1] It is native only to [Arizona](/source/Arizona) in the [Southwestern United States](/source/Southwestern_United_States), having been found only in four counties in that state: [Apache](/source/Apache_County%2C_Arizona), [Navajo](/source/Navajo_County%2C_Arizona), [Gila](/source/Gila_County%2C_Arizona), and [Coconino](/source/Coconino_County%2C_Arizona).[2][3]

*Helenium arizonicum* is an annual herb up to 70 cm (28 inches) tall. One plant can produce as many as 25 [flower heads](/source/Flower_heads), in branching arrays. The head is very nearly spherical or egg-shaped, nearly covered with as many as 700 [disc florets](/source/Disc_floret), each floret yellow near the base but purple towards the tip. There are also 12-18 [ray florets](/source/Ray_florets), yellow, sometimes with purple streaks. The species grows along the edges of wet places in pine forests.[1]

## References

1. ^ [***a***](#cite_ref-x_1-0) [***b***](#cite_ref-x_1-1) ["Helenium arizonicum in Flora of North America @ efloras.org"](http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066847). *www.efloras.org*. Retrieved 2023-09-08.

1. **[^](#cite_ref-2)** [Biota of North America Program 2014 county distribution map](https://bonap.net/MapGallery/County/Helenium%20arizonicum.png)

1. **[^](#cite_ref-3)** ["SEINet Portal Network - Helenium arizonicum"](https://swbiodiversity.org/seinet/taxa/index.php?taxon=332). *swbiodiversity.org*. Retrieved 2023-09-08.

Taxon identifiers Helenium arizonicum Wikidata: Q15559402 CoL: 3K4HZ EoL: 468893 FNA: 250066847 GBIF: 5401816 iNaturalist: 163583 IPNI: 118689-2 IRMNG: 10203154 ITIS: 36008 NatureServe: 2.133232 NCBI: 373174 Open Tree of Life: 438951 Plant List: gcc-98492 PLANTS: HEAR2 POWO: urn:lsid:ipni.org:names:118689-2 Tropicos: 2717505 WFO: wfo-0000137824 WoRMS: 1101950

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