What's the difference between sneezeweed and sneezewort?
Sneezeweed
Definition:
(n.) A yellow-flowered composite plant (Helenium autumnale) the odor of which is said to cause sneezing.
Example Sentences:
(1) Patch tests were negative for another 30 plants, including cocklebur (Xanthium strumarium), dog fennel (Anthemis cotula, fleabane (Erigeron strigosus), sneezeweed (Helenium autumnale), and feverfew (Tanacetum parthenium).
(2) Emaciation and temporary illness from sneezeweeds, bitterweed, locoweed, larkspur, lupines, and others may interfere with mating.
(3) Studies with smallhead sneezeweed (Helenium microcephalum DC) indicated that a sesquiterpene lactone, helenalin, is the only significant toxic constituent present.
Sneezewort
Definition:
(n.) A European herbaceous plant (Achillea Ptarmica) allied to the yarrow, having a strong, pungent smell.