Yellow Chamomile head showing the arrangement in 21 (blue) and 13 (aqua) spirals.

Such arrangements involving consecutive Fibonacci numbers appear in a wide variety of plants.

Yellow Chamomile head showing the arrangement in 21 (blue) and 13 (aqua) spirals.

Such arrangements involving consecutive Fibonacci numbers appear in a wide variety of plants.

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TopNewestIt occurs less often in nature, but Lucas numbers also appear in plant phyllotaxis. Fibonacci numbers and Lucas numbers are related, but Fibonacci-based phyllotaxis is more common in nature. – Michael Mendrin · 1 year, 8 months ago

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