What does it mean to count petals for fortune telling?

The number of petals is 1, 1, 2, 3, 5, 8, 13, etc. The number of petals in sunflower is usually the number in Fibonacci series, that is, the number of petals is 1, 1, 2, 3, 5, 8, 13, etc. But in fact, the number of petals of sunflower does not completely follow Fibonacci sequence, and sometimes there are exceptions. Therefore, in actual observation, the number of sunflower petals may change, but on the whole it conforms to the Fibonacci sequence law.