Fibonacci spiral in pine cone

The double Fibonacci spiral could be "double sized" : (5,8) appearing as (10,16).

Calendula arvensis

Picture size (324x200) is an approximation of golden ratio.

Alder, Alnus rhombifolia.

The golden spiral (Fibonacci numbers) can be seen in the seedheads of sunflowers elegant spirals of a pine cone or a pineapple.