Details: This poster is of Sunflower II, by Sean Hoyland. It shows a black and white photo of three sunflowers. At the bottom it says Sunflower II, Sean Hoyland .
The sunflower is an annual plant native to the Americas, with a large flowering head (inflorescence). The stem can grow as high as 3 meters (10 ft), and the flower head can reach 30 cm (11.8 in) in diameter with the large seeds. What is usually called the flower is actually a head (formally composite flower) of numerous florets (small flowers) crowded together. The outer florets are the sterile ray florets and can be yellow, maroon, orange, or other colors. The florets inside the circular head are called disc florets, which mature into what are traditionally called sunflower seeds, but are actually the fruit (an achene) of the plant. The inedible husk is the wall of the fruit and the true seed lies within the kernel.