Plant Photo Gallery
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Plant Photo Gallery (in this window)
The classification is
of the form (ki, kj) or k(i, j), where k is the number of whorls
and ki, kj are the parastichy numbers. When k =1, the configuration
is called spiral, when k>1 and i=j, it is whorled
and when k>1, and i, j are distinct, it is called multijugate.
As special cases, (1, 1) configurations are called distichous,
and 2(1,1) are called decussate. Click here
for more details about this terminology.
Note: while Fibonacci phyllotaxis is predominant in plants, we
have chosen to show a variety of phyllotaxes in this gallery, some
of which are much rarer than others. All plants samples are from
the Smith Botanic Garden.
Movies of Cylindrical Phyllotaxis
(8,13) (Fibonacci) phyllotaxis.
Wooden Model of
Movie of Douady and Couder's Original Experiment
Drops of ferrofluids are deposited periodically at the center of
a circular dish filled with silicon oil. Under the effect of magnets
surrounding the dish, the drops repel one another and are attracted
to the edge of the dish. To Douady and Couder’s own amazement,
when the magnetic field was slowly reduced during the process, the
drops self-organized into Fibonacci phyllotactic patterns.