February Spirals
Counting Spirals on Cacti.
An interest in the Fibonacci number series and how they occur in nature has been with me for quite a while. I thought it would be interesting to take a look at the occurence of spirals in particular and see if they linked to Fibonacci numbers. Below are pictures of cacti I took at a local garden centre.

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Most of the spirals I counted conformed to Fibonacci numbers ie the numbers of spirals in each direction were neighbouring Fibonacci numbers. 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89 .....
This particular one didn`t.
cactus showing 10, 16 spirals
An explanation for this and a more in depth of understanding of spirals and patterns in nature can be found at About Phyllotaxis - Classification. An interesting site, one which I will no doubt return to for more information many times.
link to more spirals
link to More Spirals