This sun-tracking behavior , known as heliotropism , is most evident in young sunflower buds and usually diminishes as the flower matures, with mature sunflowers generally facing east ...

These constrained plants produced less oil than the plants that could lean and get the maximum amount of Sun. While farmers ...

St. Luke's sunflower field in Bethlehem Township has started ... Sunflower buds are "heliotropic," meaning they shift to face the sun. That makes the flower a favorite of actress Helen Mirren ...