The limits of the squares of successive Fibonacci numbers create a spiral known as the Fibonacci spiral. It follows turns by a constant angle close to the golden ratio and is commonly called the golden spiral. The numbers of spirals in pinecones are Fibonacci numbers, as is the number of petals in each layer of certain flowers. In spiral-shaped plants, each leaf grows at an angle compared to its predecessor, and sunflower seeds are packed in a spiral formation in the center of their flower in a geometry governed by the golden ratio.