Tuesday, July 21, 2009

Fibonacci rules...

Echinacea purpurea, purple coneflower

A coneflower whorl is a lovely example of the Fibonacci series. That's the sequence of numbers created by adding together the previous two numbers starting with 0 and 1. So that gives you -- 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, and so on. Dividing two successive numbers (especially as the numbers get larger) gives the golden ratio or golden mean, which has long been a favorite device in art because of its aesthetically pleasing proportions.

But that orange against the purple ain't half bad either!!


  1. Very interesting Chris. Thanks for that post. Wonderful photo.

  2. I was never aware of that about the coneflower - how fascinating!

  3. Glad you both found it interesting. Thanks for commenting.

  4. One of my favorite flowers, and finches love the seeds.
    I always get the golden mean confused with the golden arch.

  5. I'm looking forward to seeing what happens with these flowers -- they're new to my garden this year, although I'm familiar with them from the remnant prairies in southern Wisconsin.

  6. Phew! too much thinking for me! Love the info and the picture.

  7. I'm not really a math person either, Pablo. Intuition is the way to go when it comes to my art!!


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