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Examples of phyllotaxis (literally "leaf order") Phyllotaxis is the property of some kind of visual regularity showing up in the arrangements of leaves on a plant, or any plant organs that have been sequentially produced. The spirals that are visible in the patterns are called parastichies. Here are some actual photos: Pinecone Norway Spruce needles. Pictures are about 2mm across Future hair in an artichoke heart The Romanesqueco