concentric bundle


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concentric bundle

a vascular bundle in which one tissue surrounds another, e.g. phloem around xylem (AMPHICRIBRAL BUNDLE) or xylem around phloem (AMPHIVASAL BUNDLE).
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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