Parastichy
Spiral pattern of organs on plants
![](http://upload.wikimedia.org/wikipedia/commons/thumb/4/4f/Aeonium_tabuliforme.jpg/170px-Aeonium_tabuliforme.jpg)
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]
See also
- Embryology
- Fibonacci number § Nature
- Gerrit van Iterson
- Golden ratio § Nature
- Phyllotaxis
References
External links
- Smith College, Spiral Lattices & Parastichy
- Interactive Parastichies Explorer
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Patterns in nature
- Crack
- Dune
- Foam
- Meander
- Parastichy
- Phyllotaxis
- Soap bubble
- Symmetry
- Tessellation
- Vortex street
- Wave
- Widmanstätten pattern
![](http://upload.wikimedia.org/wikipedia/commons/thumb/f/fc/Yemen_Chameleon_%28cropped%29.jpg/80px-Yemen_Chameleon_%28cropped%29.jpg)
- Pattern recognition
- Emergence
- Mathematics and art
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