Verna took this photo of our Devil’s Tongue barrel cactus in the back yard today. I couldn’t help but notice the patterns of the ribs and spines – they fit in with the mathematical topic of a post I wrote on the other blog about the Fibonacci series called Spiral Seashell. The number of ribs on the cactus and the direction and twists of the spines are all related to Fibonacci numbers. When the blooms come this summer, I’ll try and get a picture of the patterns on the flowers too.
Click on the image for a closer look.
