Common sneezeweed is a perennial herb up to 130 cm (51 1⁄3 in; 4 1⁄3 ft) tall. In late summer and fall, one plant can produce as many as 100 yellow flower heads in a branching array. Each head has 11-21 ray florets surrounding sometimes as many as 800 disc florets.
Distribution and habitat
This plant is widespread across much of the United States and Canada, from Northwest Territories as far south as far northern California, Arizona, Louisiana, and Florida. It has not been found in southern or central California, New Hampshire, or the 4 Atlantic Provinces of Canada.
Common sneezeweed is cultivated as a garden perennial. There are multiple named varieties varying in color and height. 'Pumilum Magnificum' is a yellow variety about two feet tall. 'Bruno', a reddish brown cultivar, 'Kupfersprudel', which is yellow/orange, and 'Butterpat', which is golden, all grow 3 to 3.5 feet (91 to 107 centimetres) tall. 'Chippersfield Orange' is up to 4 feet tall and is orange streaked with gold.
- The Plant List, Helenium autumnale L.
- Wilkinson, Kathleen (1999), Wildflowers of Alberta A Guideto Common Wildflowers and Other Herbaceous Plants, Edmonton, Alberta: Lone Pine Publishing and University of Alberta, p. 112, ISBN 0-88864-298-9
- Peterson, Roger T.; McKenny, Margaret (1968), A Field Guide to Wildflowers of Northeastern and North-Central North America (9th ed.), Boston: Houghton Mifflin, ISBN 0-395-91172-9
- Vance, F R; J.R. Rowsey, J.S. Maclean and F.A. Switzer (1999), Wildflowers across the prairies With a new section on Grasses, sedges and rushes, Vancouver, British Columbia: Western Producer Prairie Books, p. 299, ISBN 1-55054-703-8
- Flora of North America, Helenium autumnale Linnaeus, 1753. Common sneezeweed, hélénie automnale
- United States Department of Agriculture, Plants profile for Helenium autumnale (common sneezeweed), retrieved 2007-05-08
- Biota of North America Program 2014 county distribution map
- Biota of North America Program 2014 state-level distribution map
- Calflora taxon report, University of California, Helenium autumnale L., common sneezeweed
- Crockett, James U. (1972), Perennials (2 ed.), New York: Time-Life Books