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collateral bundle

plant anatomy

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angiosperm tissue systems

  • snake gourd flower
    In angiosperm: Stems

    … and phloem is called a collateral bundle; the outer portion of the procambium (adjacent to the cortex) becomes phloem, and the inner portion (adjacent to the pith) becomes xylem. In a bicollateral bundle, the phloem is both outside and inside the xylem, as in Solanaceae (the potato family) and Cucurbitaceae…

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