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arrangement of the leaves on the stem. Because of leaf sequencing, on the one hand, it does not cause the stems to be overloaded in any direction, on the other hand, it does not cause the leaves to cover each other. In short, so that the leaves are arranged evenly and appropriately, which is conducive to accepting sunlight and adapting to the environment. There are three basic types
leaf sequence, namely inter-life, re-birth and rotation. On each section of the stem, there is only
1
leaf called mutual leaf sequence. The leaves of each other's leaves are arranged in a spiral shape on the stems, such as broad beans, peaches, etc. Each section of the stem has two leaves lying against each other, called the raw leaf sequence, such as cloves, mint and so on. In the order of the living leaves, the pair of the leaves in the last section often crosses the leaves in the next section in a vertical direction, so that the leaves of the two sections do not obscure each other. Each section of the stem, if there are
3
or
3
or more leaves, arranged in a wheeled shape, called rotational leaf sequence, such as bamboo peaches, goldfish algae and so on. Leaf sequence is of great significance in describing the nature of plant species and identifying species, and is also one of the basis of classification.
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