Sunflower Phyllotaxis

A simple implementation of H. Vogel’s mathematical model for the pattern of florets in the head of a sunflower.

In polar coordinates:

r = c√n
θ = n × 137.5°

Further Reading

• Sunflower: Mathematical model of floret arrangement.
• The Algorithmic Beauty of Plants (free version online).
• A beautiful version by Mike Bostock.