Helenium thurberi
{{Short description|Species of flowering plant}}
{{Speciesbox
| image = THURBER'S SNEEZEWEED (Helenium thurberi) (6-3-11) patagonia-sonoita creek reserve, scc, az -01 (5794408882).jpg
| status = G4
| status_system = TNC
| genus = Helenium
| species = thurberi
| authority = A.Gray 1883
}}
Helenium thurberi is a North American plant in the sunflower family, commonly known as Thurber's sneezeweed. It is native to Mexico (Baja California Sur, Sinaloa, Nayarit, Chihuahua) and the southwestern United States (Arizona).Turner, B. L. 2013. The comps of Mexico. A systematic account of the family Asteraceae (chapter 11: tribe Helenieae). Phytologia Memoirs 16: 1–100[http://bonap.net/MapGallery/County/Helenium%20thurberi.png Biota of North America Program 2014 county distribution map]
Helenium thurberi is an annual herb up to {{convert|100|cm|in|round=0.5|abbr=on}} 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 {{convert|1.0|–|1.3|mm|in|abbr=on}} across, each yellow toward the bottom but brown or reddish-brown toward the tip. There are no ray flowers.[http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=250066859 Flora of North America, Helenium thurberi A. Gray, 1883. Thurber’s sneezeweed ]