Parastichy
From Infogalactic: the planetary knowledge core
File:Pflanze-Sonnenblume1-Asio.JPG
Spirals on the Sunflower
Parastichy, in phyllotaxy, is the (invisible) spiral line of the pattern of the areoles on some plants, such as cactuses and pinecones.[1] These spirals involve the insertion of a single primordium.[2] They have been described as an effect of the human eye and the way it connects "nearest points" on certain spiral patterns.[3]
See also
References
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- ↑ Spiral Lattices, Smith College
External links
- Smith College, Spiral Lattices & Parastichy
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