## Spiral Distribution of Seeds on a Flower |

In the June 2002 issue of
the *Mathematics Magazine*, Michael Naylor has an excellent article titled "Golden, Sqrt[2], and Pi Flowers: A Spiral Story." In it, he discusses how seeds are distributed in a spiral pattern on plants like a sunflowers. Starting from the center, each successive seed is a fixed distance from the previous seed and is rotated from the line connecting the previous two seeds by a constant angle. In this script, you can explore how different angles produce varying patterns. See Prof. Naylor's paper to see what the "best" angle - the one Mother Nature appears to use.

The angle is entered below as a percentage of a full rotation, so 45 degrees would be 1/8. If you enter a number greater than one, such as the default value of , you get the same result as you would with the fractional part of the number. Therefore, (Pi in *Mathematica*) is the same as

Mathematical Sciences

UMass Lowell

Kenneth_Levasseur@uml.edu

UML