sneezeweed

noun

1. (US, countable, uncountable)A plant of the genus Helenium, especially Helenium autumnale.

   “"Sir, you mustn't shout." "I want to reverse the decline. Rebound to boom. Land in a field of golden sneezeweed." "Sir, I don't have the faintest idea what you're talking about. I must hand over now to the manager."”

   “outracing cyclones and rangefires, switchbacking up the eastern slope of the Rockies through meadows of mule-ear and sneezeweed, on over the great torn crestline, to be delivered at last into these unholy mountains Webb grew to manhood in […]”

2. (Australia, countable, uncountable)A plant of the genus Centipeda; either of the species Centipeda cunninghami or Centipeda minima, which induce sneezing and are known as a folk remedy for colds and allergic reactions.
3. (countable, uncountable)Synonym of sneezewort (Achillea ptarmica).