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Helenium thurberi
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).
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.
Yellowdicks · Helenium apterum · Helenium argentinum · Arizona sneezeweed · Helenium aromaticum · Common sneezeweed · Bigelow's sneezeweed · Coastal sneezeweed · Shortleaf sneezeweed · Oldfield sneezeweed · Helenium chihuahuensis · Fringed sneezeweed
Text excerpted from the Wikipedia article Helenium thurberi by its contributors, under CC BY-SA 4.0; the excerpts are shared under the same licence.
Life form, climate and native range: World Checklist of Vascular Plants, Royal Botanic Gardens, Kew (CC BY 3.0), reformatted; see Plants of the World Online.
