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Plants illustrate the Fibonacci series in the numbers of leaves, the
arrangement of leaves around the stem and in the positioning of leaves, sections and
seeds.
Here a sunflower seed illustrates this principal as the number of
clockwise spirals is 55 (marked in red,
with every tenth one in white) and the number of counterclockwise spirals is 89 (marked in green, with every tenth
one in white.) |