sunflower wiki:
>For other uses, see Sunflower (disambiguation). 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 sunflower is notable for turning to face the Sun, a behavior known as heliotropism.
See more at Wikipedia.org...