Button Art - Phyllotaxy

This button art creation is called Phyllotaxy. According to Wikipedia that means: 

In botany, phyllotaxis or phyllotaxy is the arrangement of leaves on a plant stem. 

Phyllotactic spirals form a distinctive class of patterns in nature.

I found this photo here. It appears to be a poster (no longer available) by Jim Bumgardner. 

This design reminds me of the center of a daisy or a sunflower. See the blue swirl? Nice!