Golden ratio [read everything]

Challenge #11 in the Symbols series. Hosted by nDray.
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Learn about the golden ratio first: http://en.wikipedia.org/wiki/Golden_ratio Then show us! If it's mathematical formulae with the golden ratio, great! But it is also present in nature, so go after it!
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Purple Cone
by dpas11
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Fibonacci numbers can be seen here in the arrangement of seeds on the a Coneflower (member of the daisy family). You can see that the orange "petals" seem to form spirals curving both to the left and to the right.
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Submitted: Wednesday, 13th July, 2011 22:25 (GMT)
Taken: Wednesday, 13th July, 2011
Focal length: 100 mm
Shutter speed: 1/60 sec
Aperture: F5.6
ISO: 200
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