| helenium | (n) genus of American herbs with flowers having yellow rays: sneezeweeds, Syn. genus Helenium |
| autumn sneezeweed | (n) North American perennial with bright yellow late summer flowers, Syn. Helenium autumnale |
| elecampane | (n) tall coarse Eurasian herb having daisylike yellow flowers with narrow petals whose rhizomatous roots are used medicinally, Syn. Inula helenium |
| orange sneezeweed | (n) stout perennial herb of western United States having flower heads with drooping orange-yellow rays; causes spewing sickness in sheep, Syn. Helenium hoopesii, owlclaws |
| rosilla | (n) a sneezeweed of southwestern United States especially southern California, Syn. Helenium puberulum |