Parastichy

Parastichy, in phyllotaxy, is the spiral pattern of the areoles on some plants, such as cacti, sunflowers and pine cones.[1] These spirals involve the insertion of a single primordium.[2]

Spirals on a sunflower
Detail of Aeonium tabuliforme showing the multiple spiral arrangement (parastichy)

See also

References
  1. Webster's Revised Unabridged Dictionary. C. & G. Merriam Co. 1913.
  2. Weise, Dmitriy (1998-10-29). "Principle of Minimax and Rise Phyllotaxis". Retrieved 2008-12-14.


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