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- Any plant of the genus Helianthus, so called probably from the form and color of its floral head, having the form of a large disk surrounded by yellow ray flowers.
- The commonly cultivated species, Helianthus annuus, a native of America.
- A bright yellow, like that of the flower petals.
- sunflower colour:
- sunflower on Wikipedia.Wikipedia
- Helianthus on Wikispecies.Wikispecies
- Helianthus on Wikimedia Commons.Wikimedia Commons
- sunflower at USDA Plants database
- sunflower on Integrated Taxonomic Information System.