Parastichy

Parastichy

Parastichy

Spiral pattern of organs on plants

Parastichy, in phyllotaxy, is the spiral pattern of particular plant organs on some plants, such as areoles on cacti stems, florets in sunflower heads and scales in 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. [1]
    Webster's Revised Unabridged Dictionary. C. & G. Merriam Co. 1913.
  2. [2]
    Weise, Dmitriy (1998-10-29). "Principle of Minimax and Rise Phyllotaxis". Retrieved 2008-12-14.


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