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).
References in periodicals archive ?
parenchymatous with extrafascicular concentric bundles and girdling leaf
Two new petrified cycad stems, Brunoa gen. nov. and Worsdellia gen. nov., from the Cretaceous of patagonia (Bajo de Santa Rosa, Rio Negro Province), Argentina
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