Helenium autumnale is a North American species of flowering plants in the sunflower family. Common names include common sneezeweed and large-flowered sneezeweed.
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.
This plant is widespread across much of the United States and Canada, from ...
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