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Definition of Entropy of Phyllotaxy.
A top view of a shoot apex is shown. It was divided into four diagonally duplicated regions (A to D), and the entropy of phyllotaxy (H) was calculated from the number of leaf primordia in each region:
H=−
Pi 1n Pi.
Pi is the probability of leaf primordium formed in region i and is expressed by the number of leaf primordia in region i divided by the total number of leaf primordia produced (n).
