sneezeweed : Idioms & Phrases
autumn sneezeweed
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noun North American perennial with bright yellow late summer flowers
Helenium autumnale.
WordNet
orange sneezeweed
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noun stout perennial herb of western United States having flower heads with drooping orange-yellow rays; causes spewing sickness in sheep
owlclaws; Helenium hoopesii.
WordNet
sneezeweed yarrow
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noun Eurasian herb having loose heads of button-shaped white flowers and long grey-green leaves that cause sneezing when powdered
Achillea ptarmica; sneezewort.