| Such arrangements, called phyllotaxis, have been studied by scientists for decades. |
| Likewise, the spiral pattern, or phyllotaxis, exhibited by pine cones or by the petals of a sunflower is simply the result of the mathematical properties of lattices. |
| The angle of divergence may alter either abruptly or gradually, and the phyllotaxis thus becomes very complicated. |
| The Fibonacci numbers are also exemplified by the botanical phenomenon known as phyllotaxis. |
| In the Champagnat model, the mixed axes have a spiral phyllotaxis and begin their growth with an orthotropic direction before they bend under their own weight. |
| The former condition represents a lower, the latter condition represents a higher, order of phyllotaxis. |
