Above: Common Sneezeweed around Vilas Park lagoon in Madison, Wisconsin (9/05/21).
Common Sneezeweed - Helenium autumnale
Common Sneezeweed is a perennial plant that grows from 3' - 5' tall. They like sun and grow in moist fields, swamps and along shores.
Flowers are 1 to 2 inches across. They have a slightly flattened yellow disk floret that is surrounded by 10 to 15 bright yellow ray petals that are broader at their tips than at their bases. The tips of the rays are doubly notched creating 3 shallow lobes.
Blooms: August - October
Other names: Large-flowered sneezeweed, Swamp sunflower.
Above: Common Sneezeweed leaves and stalk (9/05/21).
For more information on the Common Sneezeweed, visit Wikipedia.
Or, visit the UW-Madison Wisconsin State Herbarium website page about Common Sneezeweed - Helenium autumnale.
Above: Common Sneezeweed around around Vilas Park lagoon in Madison, Wisconsin on September 4, 2021 (9/04/21).
Above: Common Sneezeweed around Marion Dunn Pond in Madison, Wisconsin (6/21/21).
Above: Common Sneezeweed specimen collected near Platteville, Wisconsin (8/17/1878).
Above: Common Sneezeweed (Helenium autumnale) botanical illustration circa 1830.
Above: Sneezeweed illustration by Alice Lounsberry circa 1899.
Above: Common Sneezeweed botanical drawing circa 1913.