There's a beautiful connection between sunflowers and maths. When you look at the edge of a sunflower's seed head, you can usually spot two families of spirals, one running clockwise and the other anticlockwise. When you count how many spirals there are in each family, you'll most probably get two consecutive numbers from the famous Fibonacci sequence. The sequence starts with a 1 followed by a 2, and all other terms are made by adding the two preceding ones, giving:

1, 2, 3, 5, 8, 13, 21, 34, 55, 89, ...