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Root Article, Root Information (Site not responding. Last check: 2007-11-01) |
 | | In woody plants, the vascular cambium, originating between the xylem and the phloem, forms a cylinder of tissue along the stem and root. |
 | | As secondary xylem accumulates, the "girth" (lateral dimensions) of the stem androot increases. |
 | | In monocotyledons,the xylem and phloem cells are located in acircle around the pith, or center of a monocot root's stele, whereas in dicotyledons, the xylem cells form a central "hub" with lobes, and the phloem cellsfill in the space between the lobes. |
| www.anoca.org /cells/secondary/root.html (613 words) |
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