08/31/2026
It’s finally that time where readied leaves fall while most of the tree still appears green. Mostly green, but some brown, acorns and hickory nuts are dropping. Leaves are beginning to wilt and turn their autumn colors. It is a great time to work on tree ID.
Many strong characteristics of tree species will show in autumn. The fruit of hard-mast species should be showing. You can start watching how acorns will change. Acorn shape, size, and coloration can help you distinguish between oaks species. For example, pin oak acorns are small, dark with pin stripes. Leaves are still holding their shape while some are wilting. Sometimes color can help indicate species. Sassafras trees are easy to ID because of the multi-shaped leaves, but sometimes one of those shapes can hold across the entire tree. Knowing sassafras turns a prominent red may help with identifying. Color may help you indicate between tree families. Hickories are mostly a bright – bronze, yellow. Many invasive bushes and vines are considered semi-evergreen, so their leaves will stay green through winter. Of course, always look for other characteristics as well. Observing other small traits like smells, leaf scar shapes, lenticels, buds, piths, armor, and bark will allow you to be confident in your species identification. A dichotomous key can guide you through traits of a tree to nail down the species!