The center of a tree or shrub stem (from roots to trunk, branches, and twigs) is woody, composed of xylem cells that conduct water from the roots to the upper parts of the tree. That woody section is ...

North points out the tree in question and students must identify the family, genus, species and common name correctly on an index card. University of Nebraska-Lincoln student Graydon Tuffield ponders ...

Known as the state tree of New Hampshire, the paper birch (Betula papyrifera) is commonly referred to as a ‘poor man’s fire starter.’ The trees’ characteristic white papery bark is impossible to miss ...

Why do trees have bark? Julien, age 6, Melbourne. This is a great question, Julien. We are so familiar with bark on trees, that most of us just take it for granted. But bark is one of the most complex ...