Unformatted text preview: Cucurbita stem vascular tissue is an example of this.) • Primary Xylem is found toward the interior of the vascular bundle. • When there is secondary growth, there will be a layer of procambium retained between the primary xylem and primary phloem. Such vascular bundles are said to be open vascular bundles, because they can proceed to secondary growth. • Eudicots that lack secondary growth have closed vascular bundles, and no procambium remains between the primary xylem and primary phloem. Eudicot open vascular bundle Closed vascular bundle...
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- Fall '09
- Xylem, Plant anatomy, Plant stem, Vascular bundle