| The sympodia are arranged more or less parallel to the stem axis and follow the phyllotactic spirals of the leaves. |
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| Counting ribs and phyllotactic spirals was easy and accurate, so that should have introduced little error. |
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| However, in Jean's model it is not possible to determine the entropy of the phyllotactic system without knowing the number of visible opposed parastichies. |
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| It is interesting to note that there is no discontinuity in the phyllotactic pattern of the flowers between the different zones of the inflorescence. |
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| A remarkable maize mutant, aberrant phyllotaxy1 displays a decussate phyllotactic pattern while wild type maize develops as distichous plants. |
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| Phyllotactic rows are easiest to identify in columnar cacti because vertically aligned leaf primordia merge together forming ribs. |
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