Science, Tech, Math › Animals & Nature Lobed Leaf Classification Balanced and Unbalanced Structures in Plant Leaves Share Flipboard Email Print Animals & Nature Forestry Individual Hardwood Species Tree Identification Basics Arboriculture Tree Structure & Physiology The Science Of Growing Trees Pests, Diseases, and Wildfires Amphibians Birds Habitat Profiles Mammals Reptiles Insects Marine Life Dinosaurs Evolution View More By Steve Nix Steve Nix Forestry Expert B.S., Forest Resource Management, University of Georgia Steve Nix is a natural resources consultant and a former forest resources analyst for the state of Alabama. He is a member of the Society of American Foresters. Learn about our Editorial Process Updated on June 17, 2019 Identifying a tree can be tricky, but examining the leaves on hardwood trees and needles on conifers can make the process a lot easier. As a matter of fact, most hardwoods and deciduous trees (with few exceptions) have leaves for foliage instead of needles. Once you are able to identify that a tree is indeed leaf-bearing, you can then further examine the leaves and determine whether or not these leaves are lobed, which according to the University of Rochester, have leaves "with distinct protrusions, either rounded or pointed" where "pinnately lobed leaves have the lobes arranged on either side of a central axis like a feather," and "palmately lobed leaves have the lobes spreading radially from a point, like fingers on a hand." Now that you've identified the lobes, you can then determine whether the leaves have balanced lobes or if the tree contains a mixture of balanced and unbalanced leaves, which will help determine exactly what species and genus of tree you're observing. Unevenly Balanced Lobes Ed Reschke/Getty Images If your tree has at least some leaves that are asymmetrical and have unevenly balanced lobes, you probably have either a mulberry or a sassafras. The unique qualifier for these types of leaves it that their lobes aren't symmetrical, though these lobes can still be further broken down and classified according to the shape of each leaf, wherein these leaves can be considered ovate (egg-shaped with a wider base), obovate (egg-shaped but broader near the tip), elliptic, or cordate (heart-shaped). Typically, hardwoods, as opposed to conifers and other deciduous trees, have leaves with unevenly balanced lobes. Along with mulberry, sassafras several plants including bull thistle and the bittersweet nightshade have unevenly balanced lobes on their leaves. Evenly Balanced Lobes Tony Howell/Getty Images If your tree has a leaf with lobed projections that match on both the right and left sides, it's considered to be an evenly balanced leaf. Both palmately veined leaves like maple and pinnately veined leaves like oak fall into this category. Indeed, most plants with lobed leaves are symmetrical, and for that reason, further classification is much broader in evenly balanced lobed leaves than in unevenly balanced. Flowering trees and plants are often considered lobed as well and typically feature balanced leaves — though oftentimes these fall into different categorizations because of the unique shapes of the flower's petals. Next time you see a tree, take a look at its leaves — are there protruding edges to the leaf? If you fold it in half will each side perfectly mirror the other? If so, you're looking at an evenly balanced lobe. Cite this Article Format mla apa chicago Your Citation Nix, Steve. "Lobed Leaf Classification." ThoughtCo, Sep. 3, 2021, thoughtco.com/lobed-hardwood-leaves-tree-leaf-key-1343478. Nix, Steve. (2021, September 3). Lobed Leaf Classification. Retrieved from https://www.thoughtco.com/lobed-hardwood-leaves-tree-leaf-key-1343478 Nix, Steve. "Lobed Leaf Classification." ThoughtCo. https://www.thoughtco.com/lobed-hardwood-leaves-tree-leaf-key-1343478 (accessed October 3, 2022). copy citation Watch Now: What Are Balanced Lobed Hardwood Leaves?