The double Fibonacci spiral could be "double sized" : (5,8) appearing as (10,16).
Fibonacci spiral in pine cone, pictures enjoy learning how the world works.
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.
All naturalistic artworks should learn to read carefully in the book of nature; that is the secret!
διπλοῦν ὁρῶσιν οἱ μαθόντες γράμματα
Those who know the letters see double
Beauty must be natural and unadorned; beautiful things are stress relieving.
Theodor W. Adorno
Art has complicated roots that make it difficult to fix.
The ratios of successive Fibonacci numbers approaches the golden ratio as approaches infinity, as first proved in 1753.