1. A genus of tall plants with large yellow flowers that turn to follow the sun, including the common sunflower.
Usage: botanical term; often capitalized when referring to the genus

Examples

• The helianthus plant is native to North and South America.
• Helianthus annuus is the scientific name for the common sunflower.
• The bright yellow petals of helianthus flowers attract bees and butterflies.
• Farmers grow helianthus for both ornamental and commercial purposes.
• The helianthus genus includes several species with varying heights and colors.