Write a short note on Phylloclade

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Phylloclade is an aerial modified stem. It is flattened and green with nodes and internodes. Leaves are modified into spines. The phylloclade is normally developed in xerophytic plants. Stem functions as leaf as well as storage organs and contains water and nuclilage. There is a thick cuticle on the stem to check evaporation. Example. Opuntia.

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