Class 11 · Morphology of Flowering Plants

Phyllotaxy: Leaf Arrangement Patterns — NEET Biology

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Phyllotaxy is the pattern of arrangement of leaves on the stem or branch. This is usually of three types – alternate, opposite and whorled. In alternate type of phyllotaxy, a single leaf arises at each node in alternate manner, as in china rose, mustard and sun flower plants. In opposite type, a pair of leaves arise at each node and lie opposite to each other as in Calotropis and guava plants. If more than two leaves arise at a node and form a whorl, it is called whorled, as in Alstonia.

🖼️Related NCERT figure: Three plant specimens showing different types of phyllotaxy - (a) China rose with alternate leaf arrangement, (b) Guava with opposite leaf arrangement, and (c) Alstonia with whorled leaf arrangement (Figure 5.6 Different types of phyllotaxy : (a) Alternate (b) Opposite (c) Whorled)
NCERT Biology · Class 11 · Chapter 5 · Paragraph 19
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Match the following plants with their type of phyllotaxy: Column I (Plant) 1. Mustard 2. Calotropis 3. Alstonia 4. China rose 5. Guava Column II (Phyllotaxy type) A. Alternate B. Opposite C. Whorled

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