Origin of xylem
Examples from the Web for xylem
The larger vascular bundles consist of xylem and phloëm surrounded by a bundle sheath of a single layer of cells.
The larger bundles are normal in every way, while in the smaller ones the xylem elements are considerably reduced.
The arrangement of the xylem and the phloëm is different from that of the stem.
Just above the xylem there is a group of large and small thin-walled cells.
The number of xylem groups is fairly large and the development of the xylem is from the pericycle towards the centre of the stele.