Helianthus annuus is also commonly known as a sunflower. It is an annual herbaceous plant in the family Asteraceae, of the genus Helianthus. It grows to a height of between one and three meters. The stout and straight stem is covered with bristles, and a solitary capitulum grows at the top of the stem. The staminate ligulate flowers are yellow, while the tubular flowers are puce. The hermaphrodite flowers blossom from July to October, and the fruits mature from September to November. The Purpureus species is an ornamental variety.
Helianthus Annuus is native to North America and widely cultivated across China.
The plant requires a warm and sunny climate, is drought-enduring and is tolerant of infertile soil, with good adaptability. It is suitable for landscaping in gardens as well as cut-flowers. Furthermore, its seeds can be used to manufacture oil. In the early period of the sixteenth century, the Spanish found a large sheet of sunflowers in the mountainous regions of Peru and Mexico. Regarding them as the holy flowers created by God, the Spanish people brought the sunflowers back to Europe for further cultivation.