The sunflower (Helianthus annuus) is an annual plant in the family Asteraceae, with a large flower head (inflorescence). The stem of the flower can grow up to 3 metres tall, with the flower head reaching 30cm in diameter. The term "sunflower" is also used to refer to all plants of the genus Helianthus, many of which are perennial plants.
What is usually called the flower is actually a head (formerly composite flower) of numerous flowers crowded together. The outer flowers are the ray florets and can be yellow, maroon, orange, or other colors. These flowers are sterile. The flowers that fill the circular head inside the ray flowers are called disc florets.
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Sunflower :: Oilseeds
Helianthus :: Asteraceae

Complete Guide to Growing Sunflowers - Guide to sunflower gardening provides descriptions of different species, cultivation information, and fun facts.
Growing Sunflowers - Instructions on growing sunflowers from the Ohio State University.
Meta Description: [ The sunflower is native to North America, and was used by early North American Indians for food and pressed to make hair oil. Meal from processed seed ]
SunflowerLovers.com - Information about growing sunflowers, includes books, links, pictures, and art depicting sunflowers.
Sunflowers - Information from Iowa State University.
The Sunflower Stop - Guide to growing sunflowers with a number of illustrated steps.
Meta Description: [ Guide to growing sunflowers ]
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