Knowing how to identify tree leaves can help to know which trees are growing in woodlands, forests, or parks. It is possible to identify leaves by their shape, edging, size and patterns. Some deciduous trees have tree leaves that are heart, ovoid, rounded, lanceolate, and triangular shapes. Evergreen coniferous trees have leaves that look like needles or clusters of scales.

In this article, you will learn about leaf identification and how to recognize the different parts and structures of tree leaves. The leaf shapes mentioned in this identification guide also apply to other plants such as flowers, shrubs, and bushes.

On April 1st 2017, the new leaves of the Blackjack Oak were slowly fading from pink to pastel green, and taking on their unique shape. In the summer of 2017, this tree became afflicted with the same mysterious yellow spots as the Nuttall Oaks and the Red Maple. Possibly due to herbicidal drift from a neighboring lot. The best and most characteristic leaves of any tree come from mature individuals, as you might expect. Also, blackjack leaves are typically much larger, and with a good bit of reddish hairs on.

Tree Leaf Identification

There is much more to identifying tree leaves than just by their shape. Ovate-shaped tree leaves can be rounded, elongated, or taper to a point. Also, the margins of these leaves can be smooth, serrated, notched, or lobed. When trying to identify a tree by its leaves, you can also notice the venation patterns on the leaf as well as its color and size.

Blackjack oak leaves Blackjack oak stump, approx. 75 years old Quercus marilandica is a small deciduous tree growing to 15 meters (49 feet) tall, with bark cracked into rectangular black plates with narrow orange fissures.
We have included the various common names associated with each scientific name to help you find the right tree. Some common names can apply to more than one tree species, so if you are having trouble narrowing down your search, take a look at our A-Z Common Name List to see which scientific names match up to the common name you are searching for.

Another clue as to the tree species is by looking at how the leaves are arranged on the stem. You may notice in some pictures of leaves and stems that some leaves grow opposite each other and some are arranged in an alternate pattern. These are all different ways to identify tree species by their leaves.

Knowing the terms of how leaves are identified (called leaf morphology) is a great way to learn how to identify many trees and plants.

Types of Tree Leaves with Pictures for Easy Identification

Before looking at how to tell apart species of trees by the shape of their leaves, let’s look at how leaves grow on stems.

The way that leaves grow on stems is called phyllotaxis in botanical terms.

Opposite Leaves

Opposite Leaves grow in pairs on either side of the stem

As the name suggests, opposite leaves that grow on stems grow directly opposite each other. Looking at pictures of opposite leaves, you will see that the leaves are in pairs on either side of the stem.

Blackjack Oak Tree Leaves Pictures

Opposite leaves grow on the same plant node – this is the point on the stem where the stems, buds, or leaves grow from. Many types of trees have stems with opposite leaves and the leaf shape depends on the species of tree. Leaves that grow opposite each other can be simple leaves or compound leaves.

Trees with examples of opposite leaves include maples, ash trees, elders, olive trees, and eucalyptus.

Alternate Leaves

Alternate leaves on stems grow in a staggered pattern and they look like each leaf grows in between the leaves on the opposite side. This means that each plant node only has one leaf growing from it.

Examples of trees with alternate leaves include oak trees, sycamore, mulberry, birch, hickory, and willow.

Whorled Leaves

Whorled leaves radiate from a single point and surround the stem

The third type of leaf arrangement that is found on some trees is whorled leaves. Whorled leaves grow in a similar way to opposite leaves. However, instead of having just 2 leaves in an opposite arrangement, there are 3 or more leaves growing from each node on stems with whorled leaves.

There are not many trees or shrubs which have whorled leaves.

Simple Leaves

Simple leaves have single leaf blade. In the photo: maple leaf

Another way to identify types of trees by leave is if they have simple leaves or compound leaves. These terms refer to the number of leaves that grow on the petiole. Texas holdem clock app. The petiole is the small thin stalk that is attached to the stem and the leaf blade (lamina).

Foliage on trees and plants that is made up of simple leaves only have a single blade growing on the stalk. So, a simple leaf just has one blade on each petiole. Simple leaves can grow in alternate arrangements or opposite arrangements on the stem.

Examples of deciduous trees with simple leaves include maple trees, sycamore trees, elm trees, and oak trees.

Compound Leaves

Compound leaf consists of several leaflets joined to a single stem

Compound leaves are when there are a number of leaflets growing on one leaf stalk (petiole). You can think of this as a number of small leaves that grow together to form a complete leaf.

It can be tricky to know if the leaf you have in your hand is a simple leaf or compound leaf. One way to tell them apart is to see if there is a node where the leaf/leaflet joins the stem. If there is a node, then you have a simple leaf, whereas a lack of node indicates it is a compound leaf.

Examples of trees with compound leaves include ash trees, walnut trees, hickory trees, and horse chestnut trees.

There are a number of types of compound leaves, and knowing about them can help make tree identification easier.

Types of compound leaves. From left to right: pinnate leaves, palmate leaves and double pinnate leaves

Pinnate leaves (compound)

Trees that have pinnate leaves mean that the leaflets on the compound leaf grow in each side along the length of the petiole like a feather arrangement. Sometimes these types of leaves called pinnately compound leaves.

Examples of pinnate leaves are found on trees such as walnut, ash, pecan, and hickory trees.

Palmate leaves (compound leaves)

Palmate leaves have a number of leaflets growing at the end of the leaf stalk. These compound leaves usually look like the shape of a hand with a palm and fingers. That is why they are called palmate leaves.

Trees that grow palmate leaves include horse chestnut and buckeye trees.

Double pinnate (bipinnate) leaves

Trees with bipinnate leaves have leaves that resemble fern leaves. You will notice in pictures of double pinnate leaves that the compound leaves are made up of a number of secondary stems that have leaflets growing in an opposite arrangement.

Some examples of trees with bipinnate leaves are honey locust trees, the Texas redbud, and Kentucky Coffee trees.

Lobed, Toothed, or Entire Leaves

You can identify a tree by its leaf shape. From left to right: unlobed leaf, lobed leaf and toothed leaf

One very important way to identify types of tree leaves is by the overall shape of the leaf around its edges. The edges of leaves create patterns that are often unique to the species of tree and help with identification.

Entire leaves (unlobed)

Most oval or round-shaped leaves are called ‘entire leaves.’ This means that the leaf edge is smooth and round without having any special features. Later in the article, you will learn more about the specific shapes of entire leaves. These types of leaves can also be called unlobed leaves.

Lobed leaves

Lobed leaves can have rounded tips like the white oak leaf (left) or pointed tips like maple leaf (right)

The most easily identifiable type of tree leaf is the lobed variety. These leaf blades are made up of earlobe-like shapes, but they form a single leaf. The clefts or indentations between the lobes can be deep or shallow depending on the type of tree. The space or indentation between two lobes is called sinus.

Some examples of trees with lobed leaves include oak trees and maple trees. You will see i

Blackjack Tree Leaves