Sunflowers Screensaver - Version 1.0 The free screensaver, Sunflowers, was created by RateMyScreensaver.com and contains 19 high resolution images of sunflowers. The sunflower (Helianthus annuus) is an annual plant native to the Americas 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 30 cm in diameter.