any of a genus (Helenium) of plants of the composite family; esp., a North American perennial (H. autumnale) said to cause sneezing
- Any of several New World herbs of the genus Helenium of the composite family, having yellow to red-purple rayed flower heads.
- See sneezewort.
- (US) A plant of the genus Helenium, especially Helenium autumnale.
- (Australia) A plant of the genus Centipeda; either of the species Centipeda cunninghamii or Centipeda minima, which induce sneezing and are known as a folk remedy for colds and allergic reactions.