Skip to Main Content

ID that Indiana Tree with Purdue Extension

Spring is in full bloom and trees are beginning to look green again. Learning how to identify trees in yards, neighborhoods and local parks provides insight into the diversity and relationships found in nature. Lenny FarleePurdue Extension Forester, shares how to identify trees native to Indiana.

Leaf Arrangement

Leaf arrangement is one of the first characteristics to check for on deciduous (trees that lose their leaves annually) broadleaved trees that make up the majority of our native species. The two arrangements we commonly find are alternate and opposite.

Opposite arrangement means the leaves are held on the twig directly opposite of one another. Alternate leaf arrangement means the leaves are arranged on the twig in an offset manner. We have one leaf, then another in a zig-zag or spiral fashion.

Image with two types of leaves arrangement. On the left leaves are offset on the branch (cherry), and on the right leaves are directly opposite each other (Ash)

There are only a few native tree families with opposite leaf arrangements: Maple, Ash, Dogwood, Catalpa, Buckeye. You can remember these from the anacronym MAD Cat Buck – Maple, Ash, Dogwood, Catalpa, Buckeye. Almost all other native trees have alternate leaf arrangements.

Leaf Types

The next characteristic to check is if the tree has simple or compound leaves. To do this, we need to understand the difference between a leaf and a leaflet. A leaf has a bud at the base of the stem. The entire structure after the bud is the leaf.

A simple leaf is singular and never divided into smaller leaflets. A compound leaf consists of several or many leaflets joined to a single stem after the bud.

Image with several types of leaf (shape differently). On the left single leaves on twig, and on the right many leaflets

Several tree groups with simple leaves include oaks, cherries, elms, birches and basswoods. Some groups with compound leaves include hickories, walnuts, ash, buckeyes and sumac. Some tree groups have examples of each – most maples have simple leaves, but box-elder has compound leaves.

We have very few trees that have doubly-compound leaves, meaning there are two sets of leaf stems with leaflets arranged on the secondary stems. Devils walking stick, Kentucky coffee tree and sometimes honey locust have doubly-compound leaves.

Fruit

One of the best characteristics for tree identification is the fruit produced. Unfortunately, this may not be available much of the year. The acorns of oaks and the nuts of hickories in particular are very helpful for identification.

Let’s Practice

Let’s take a look at our state tree, the tuliptree. Observing the twigs, we see the leaves are alternating. The twigs are smooth shiny brown and the buds look like a duck’s bill with two large scales. The leaf is unique in shape with 4 to 6 lobes and a broad V-shaped notch at the top.

Using as many characteristics as we can find, in conjunction with a good tree ID key like Purdue Extension’s An Introduction to Trees of Indiana, can assist homeowners to youth with the identification of our native trees.

Featured Stories

Shopping cart in store
Consumers see food prices as rising more than other goods and services, find ways to adapt

More than 80% of consumers perceive that food prices have increased a little or a lot over the...

Read More
beets-student-farm
Registration is now open for upcoming Purdue Small Farm Education Field Day

Register for the Purdue Small Farm Education Field Day, an event featuring an array of...

Read More
Chris Wirth holding bug specimen
Behind the Research: Chris Wirth

Many people are involved in the remarkable range of programs, services and facilities that...

Read More
Purdue College of Agriculture.
Farmer sentiment recovers in May; interest in solar leasing rising

U.S. farmers’ outlook improved in May as the Purdue University/CME Group Ag Economy...

Read More
Ken Fuelling leans against a brown pole in an empty classroom. Empty chairs and a blank projector screen fill the background.
Promoting acceptance in agricultural education

Ken Fuelling (he/they) had already been accepted into graduate school to work with Sarah LaRose...

Read More
The 2024 Ecology of Natural Disturbances course students and faculty on a bridge in Smoky Mountain National Park
Smoky Mountain Spring Break Trip Brings Disturbance Ecology Coursework to Life

While some students headed to tropical locales for Spring Break excursions, those in the FNR...

Read More
To Top