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Unformatted text preview: patterns in bark. The bark pattern of a tree is also a species characteristic. In contrast, all of the secondary xylem is retained as the stem expands, forming the wood portion of the stem. Tissues in Secondary Growth Xylem - wood Cells that mature inward from the vascular cambium are xylem tissue. This tissue forms the part of the stem we call wood. Wood forms the bulk of secondary growth, and, as we know, can have a great volume. Most eudicots have some secondary growth in vascular tissue. All woody plants (shrubs and trees) are perennials with significant secondary growth. All conifers are also woody plants. Some monocots are woody, but they have very special ways of obtaining strength and dimension and will be discussed at the end of this section....
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- Fall '09