They were then introduced to Europe in the early 16th century and made their way to Russia. Sunflowers are thought to have been domesticated 3000–5000 years ago by Native Americans who would use them primarily as a source for edible seeds. In the 16th century the first crop breeds were brought from America to Europe by explorers. Native American people grew sunflowers as a crop from Mexico to Southern Canada. Domestic sunflower seeds have been found in Mexico, dating to 2100 BCE. They were first domesticated in what is now Mexico and the Southern United States. Sunflower florets are arranged in a natural spiral having a Fibonacci sequence Origin They grow to 1.8 m (6 ft) and are primarily found in woodlands, adjacent to creeks and moist, prairie-like areas. The primary threats are industrial forestry and pine plantations in Alabama, Georgia, and Tennessee. Fish and Wildlife Service issued a final rule protecting it under the Endangered Species Act. On the other hand, the whorled sunflower, Helianthus verticillatus, was listed as an endangered species in 2014 when the U.S. Several perennial Helianthus species are grown in gardens, but have a tendency to spread rapidly and can become aggressive.

annuus typically grows during the summer and into early fall, with the peak growth season being mid-summer. tuberosus), are cultivated in temperate regions and some tropical regions as food crops for humans, cattle, and poultry, and as ornamental plants. This and other species, notably Jerusalem artichoke ( H. The common names 'sunflower' and 'common sunflower' typically refer to the popular annual species Helianthus annuus, whose round flower heads in combination with the ligules look like the sun. Except for three South American species, the species of Helianthus are native to North America and Central America. Helianthus ( / ˌ h iː l i ˈ æ n θ ə s/) is a genus comprising about 70 species of annual and perennial flowering plants in the daisy family Asteraceae.

Genesis 2100 mtn bike price