Helenium autumnale is a North American species of poisonous[3] flowering plants in the family Asteraceae. Common names include common sneezeweed and large-flowered sneezeweed.[4][5][6]
^Wilkinson, Kathleen (1999), Wildflowers of Alberta A Guide to Common Wildflowers and Other Herbaceous Plants, Edmonton, Alberta: Lone Pine Publishing and University of Alberta, p. 112, ISBN0-88864-298-9
^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, ISBN1-55054-703-8