The common name for the plant Helianthus annuus is the sunflower. Sunflowers are recognized for their tall stems, broad leaves, and distinctive large yellow blooms that resemble the sun, hence the name. They are cultivated not only for their aesthetic appeal but also for their seeds, which are nutritious and can be eaten as snacks or used to produce sunflower oil. Additionally, sunflowers are known for their unique behavior of "heliotropism," where young flowers track the sun's movement across the sky, a characteristic that enhances their growth.