[mass noun] A yellow-flowered North American plant of the daisy family. Some kinds are toxic to grazing animals and some are used by American Indians in the treatment of colds.
- ‘The yellow-green disk at the center of the flowers is a distinguishing mark for sneezeweed.’
- ‘An orange sneezeweed finds itself supported by the chevroned leaves of a companion.’
- ‘Some other wildflowers are white-flowered bog orchid, California grass-of-Parnassus, Sierra gentian, Plumas alpine aster, western sneezeweed, and the highly toxic western water hemlock.’
- ‘In September and October, purple hardy asters, backed with golden sneezeweed and ‘Taiyo’ sunflowers, create a dazzling picture.’
- ‘One vulnerable species, a plant called the Virginia sneezeweed, was known only from Virginia until a population was discovered in Missouri in 1960.’