

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.

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.


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 
Home 

