| helianthus | any plant of the genus Helianthus having large flower heads with dark disk florets and showy yellow rays |
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| helianthus | sunflower of eastern North America having narrow leaves and found in bogs |
| helianthus | annual sunflower grown for silage and for its seeds which are a source of oil |
| helianthus | very tall American perennial of central and the eastern United States to Canada having edible tuberous roots |
| helianthus | tall rough-leaved perennial with a few large flower heads |
| helianthus | tall perennial of central United States to Canada having golden-yellow flowers |
| helianthus | similar to the common sunflower with slender usually branching stems common in central United States |
| helianthus | tall perennial with hairy stems and leaves |