Winter Tree Anatomy Walk
You can download and print the entire Winter Tree Anatomy checklist we will use during this walk at this link: Winter Anatomy Checklist.

Look at twigs and trees in your neighboorhood;
see what you can find!

□ Adventitious buds
Buds appear in places other that at the end of a twig or in leaf axils.

□ Bud scale scar
Terminal buds leave behind a scar that encircles the twig. The space between these rings equals one years growth.

□ Bud scales
Protect the leaf buds. When the bud scales are layered like shingles, like the twig on the left, they are refered to as imbricate scales. Naked buds have no scales.

□ Bundle or vein scars
These cork filled dots inside the leaf scars are the ends of the tubes that once supplied water to the leaf.

□ Lateral
Leaf, spine, branch, side shoot, or bud that has branched off of a larger stem.

□ Leaf scar
Scars that develop wherever a leaf falls from the stem. Next years bud are often found beside leaf scars.

□ Lenticels
Small cork filled dots on twigs and bark that allow gases to be exchanged between air and the inner tissues of a plant. (Like the black spots on paper birch trees)

□ Nodes, Internodes
A node is a place or swelling that is the part of a plant stem from which one or
more leaves emerge.Internodes is the area on a stem between the nodes

□ Petiole
The stem of tree leaves. Compound leaf petiloes remain on some trees throughout the winter.

□ Pubescent
Covered with fine hairs.

□ Spine, or thorn
A modified leaf or stem forming a woody, sharp point.

□ Terminal bud
From this bud, the twig will grow longer in spring.

□ Tomentose
Another one of the many words for hairy; this term means densely woolly; The hairs soft and matted.