Before revision: Heliotropism, a form of tropism, is the diurnal or seasonal motion of plant parts (flowers or leaves) in response to the direction of the Sun.
After revision: 400px|Daisies (Bellis perennis) face the sun after opening in the morning and will follow the sun through the dayHeliotropism, a form of tropism, is the diurnal or seasonal motion of plant parts (flowers or leaves) in response to the direction of the Sun.