Winter may seem like a lousy time to identify trees and shrubs. Without leaves to look at, things definitely get a little difficult, but with a few tricks (and maybe a good book) in hand you can up your botany game and learn to identify trees and shrubs without leaves! And why, you might ask, would we even bother to identify trees and shrubs in the winter? Besides honing a skill to impress your friends and neighbors, a lot of management decisions are made in winter. The frozen ground reduces the impact of heavy machinery, making in and ideal time for a timber harvest, or wildlife habitat management. As such, it can be helpful to know what trees and shrubs are on your land to help guide management. Here are the 3 B’s of winter tree and shrub identification:
All trees and shrubs have one of two branching patterns. They are either opposite, where twigs come off a branch opposite one another, or they are alternate, where twigs alternate up the length of the branch (see photos). Observing the pattern of branching can help narrow down what type of tree or shrub you are trying to identify. The follow families or groups of native trees and shrubs have opposite branching:
- Maple tress
- Ash trees
- Horse chestnut trees
- Dogwood trees/shrubs
- Viburnums (arrowwood, maple-leaf viburnum, nannyberry, etc.)
Buds come in all different shapes and sizes and can help in identifying a species of tree or shrub. Observe whether the buds are pointy or rounded, long or short, do they hug close to the twig or point far off to the side, or do they even have buds at all? These observations will help you narrow down the species of tree or shrub you may be looking at.
Bark is another great tool to use in winter when identifying trees in particular, but also shrubs. The texture, color, and even smell of bark can help you identify a tree or shrub species. However, keep in mind that bark can look quite different depending on the age of a tree even within the same species. The photos below show some of the variation you might see in bark.
Fruit – Some trees and shrubs hold onto their fruit into the winter such as the rosehips or winterberry fruit seen below.Other Clues
Beyond branching, buds and barks, here are a couple other clues to look for in winter to help identify trees and shrubs:
Leaves – If there isn’t snow on the ground, take a look under the tree to see if you can find leaves that might help you in further narrowing down your options. Some trees also hold their leaves in winter such as the young beech tree shown below.
There are many books to help you learn more about winter tree and shrub identification, but here are a couple to get you started:
- “Winter Tree Finder: A Manual for Identifying Deciduous Trees in Winter (Eastern US)” by May T. Watts and Tom Watts
- “Bark: A Field Guide to Trees of the Northeast” by Michael Wojtek
- “Fruit Key and Twig Key to Trees and Shrubs” by William M. Harlow, PhD
By Emma Tutein, UNH Cooperative Extension
Winter 2018 Taking Action for Wildlife Newsletter