collateral bundle


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collateral bundle

a plant vascular bundle in which the PHLOEM is on the same radius as the XYLEM and external to it.
References in periodicals archive ?
amazonum 1'Absence of trichomes at petiole apex 2 Angular collenchyma, two layers of palisade parenchyma in mesophyll, one vascular bundle in middle vein of the blade, collateral bundle in petiole N.
There are smaller collateral bundles distributed among the cells of the proliferated pericycle, and the remaining collateral bundles are larger and randomly distributed, as illustrated in Figure 9.
In distal part of petiole (Figure 3C), the vascular system is formed by collateral bundles arranged cylindrically, surrounded by sclerenchyma sheath and a small portion of phloem occurs in the medullar parenchyma.
Distinguishing features: Polyxylic stem with a persistent armor of leaf bases [ILLUSTRATION FOR FIGURES 3B & 4D OMITTED] and a parenchymatous pith with anastomosing collateral bundles and mucilage channels.
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