Trees that grow well in Illinois have to adapt to one of the more surprising climate gradients found within a single state, since Illinois stretches more than 385 miles from north to south, placing Chicago in a climate similar to southern Wisconsin while the southern tip near Cairo sits at roughly the same latitude as Richmond, Virginia.
This north-south span means Illinois functions as a genuine transition zone between the cooler hardwood forests typical of the upper Midwest and the warmer, more southern forest communities found along the Ohio and Mississippi River confluence, allowing species like bald cypress and pecan to grow naturally in the state’s southernmost counties while paper birch and quaking aspen persist in isolated pockets near the Wisconsin border.
Although Illinois is widely known as the Prairie State, historical accounts suggest that forests and oak savannas once covered around 40 percent of the state before extensive agricultural conversion during the 19th century dramatically reduced native tree cover. Southern Illinois is also home to Shawnee National Forest, a rugged, heavily forested region containing rock formations, natural bridges, and the northernmost naturally occurring bald cypress swamps found anywhere in North America.
This list explores 50 trees, ranging from iconic prairie-savanna oaks to southern bottomland specialists and popular urban shade trees, that grow well across Illinois’s surprisingly varied landscape.
White Oak
The white oak, Illinois’s official state tree, is considered one of the most valuable native hardwood species found throughout the state, typically reaching a mature height of 60 to 100 feet and capable of living for more than 400 years under favorable conditions. This tree produces relatively sweet acorns compared to many other oak species, an important food source for deer, turkey, and squirrels found throughout Illinois’s remaining forested regions.
White oak grows notably slowly, often taking 50 years or more to reach significant size, but this slow growth produces exceptionally strong, durable wood that has long been prized for furniture and barrel making throughout the state’s hardwood industry. This tree’s rounded, spreading crown and light gray, scaly bark make it easily distinguishable from Illinois’s other common native oak species.
Bur Oak
The bur oak is one of the most iconic trees associated with Illinois’s historic oak savanna landscape, easily identified by its thick, corky bark and enormous acorns capped with a distinctive shaggy, fringed cup, typically reaching a mature height of 70 to 90 feet. This tree is remarkably fire and drought tolerant, adaptations that allowed it to thrive for centuries in the open, sunny conditions of Illinois’s prairie-forest border before widespread agricultural conversion eliminated most of this habitat type.
Bur oak can live for more than 300 years, and scattered ancient specimens found today in Illinois cemeteries, parks, and remnant savannas offer a rare living connection to the state’s pre-settlement landscape. This tree’s exceptional drought tolerance and adaptability to a wide range of soil types have also made it an increasingly popular choice for modern Illinois street tree and park plantings.
Northern Red Oak
The northern red oak is one of Illinois’s fastest-growing native oak species, typically reaching a mature height of 60 to 90 feet and found throughout the state’s forested regions from the northern counties down through the central hardwood belt. This tree produces attractive dark red fall foliage and grows considerably faster than white oak, often reaching commercial timber size in significantly less time under good Illinois forest soil conditions.
Northern red oak is highly valued commercially, supporting a meaningful portion of the state’s hardwood forest products industry, particularly throughout the more heavily wooded counties along the state’s eastern and southern borders. This tree’s relatively straight, tall trunk and strong, attractive wood grain have made it a particularly important species for furniture manufacturing throughout Illinois.
Shingle Oak
The shingle oak is a distinctive native tree found throughout Illinois, notable for its smooth-edged, unlobed leaves that closely resemble willow or laurel foliage rather than the typically lobed leaves associated with most oak species. This tree typically reaches a mature height of 50 to 60 feet and gets its common name from the historic practice of splitting its wood into shingles for roofing material by early Illinois settlers.
Shingle oak tolerates a wide range of soil conditions and is notably adaptable to Illinois’s clay-heavy prairie soils, making it more versatile than many other native oak species found within the state. This tree’s semi-evergreen habit, retaining brown leaves well into winter in milder years, provides year-round visual interest and helps distinguish it during Illinois’s dormant season.
Swamp White Oak
The swamp white oak is a native tree well adapted to Illinois’s wetter bottomland forests and floodplain soils, typically reaching a mature height of 50 to 60 feet with a broad, rounded canopy. This tree tolerates periodic flooding and poorly drained clay soils considerably better than most other oak species, making it a valuable choice for low-lying areas throughout Illinois’s river valleys and drainage basins.
Swamp white oak produces attractive, deeply furrowed, flaking bark and displays a reliable yellow-brown fall color across much of its range within the state. This tree’s strong tolerance for Illinois’s heavy, poorly drained soils has also made it an increasingly popular choice for urban stormwater management plantings and rain garden landscaping throughout the state’s cities.
Pin Oak
The pin oak is a fast-growing native tree commonly found in Illinois’s wetter lowland areas and floodplains, typically reaching a mature height of 60 to 70 feet with a distinctive pyramidal to oval crown shape. This tree is easily identified by its numerous small, pin-like branches along the lower trunk, a feature that persists even as the tree matures and gives the species its common name.
Pin oak tolerates wetter, poorly drained soils considerably better than many other Illinois oak species, though it can struggle in the state’s more alkaline soils, sometimes developing a yellowing condition called iron chlorosis. This tree’s reliable bronze-red fall color and relatively fast growth have made it one of the more commonly planted street and park trees throughout Illinois’s cities, particularly in the Chicago metropolitan area.
Shellbark Hickory
The shellbark hickory is the largest native hickory species found in Illinois, typically reaching a mature height of 60 to 80 feet and producing the largest nuts of any hickory species in North America, sometimes measuring more than 2 inches across. This tree favors the rich, moist bottomland soils found throughout Illinois’s river valleys, particularly along the state’s larger waterways where deep, fertile alluvial soil supports its substantial size.
Shellbark hickory grows relatively slowly and can live for more than 200 years under favorable bottomland forest conditions found throughout the state. This tree’s sweet, edible nuts were historically an important food source for both wildlife and early Illinois settlers, though the exceptionally hard shell requires considerable effort to crack open.
Shagbark Hickory
The shagbark hickory is found throughout Illinois’s upland forests, easily identified by its distinctive gray bark, which peels away from the trunk in long, curling strips, giving mature trees a notably shaggy, textured appearance. This tree typically reaches a mature height of 60 to 80 feet and produces sweet, edible nuts that were historically an important food source for both Indigenous communities and early Illinois settlers.
Shagbark hickory grows relatively slowly, often taking several decades to reach significant size, and can live for more than 300 years in undisturbed forest settings throughout the state’s oak-hickory woodlands. This tree’s extremely hard, dense wood has also been historically valued for tool handles and smoking wood, prized for the distinctive flavor it imparts to meats prepared over hickory smoke.
Sugar Maple
The sugar maple is found throughout Illinois’s northern and central hardwood forests, typically reaching a mature height of 60 to 80 feet and producing some of the most vivid orange and red fall foliage found anywhere in the state. This tree thrives in the rich, moist soils found throughout Illinois’s mesic upland forests, often growing alongside American beech and various oak species in the state’s more mature woodland communities.
Sugar maple’s brilliant fall color display draws considerable seasonal attention to Illinois’s forest preserves and state parks each October, particularly throughout the state’s northern and central counties. This tree’s dense, hard wood has also been historically valued for furniture and flooring production, and select stands throughout the state support modest local maple syrup production each late winter.
Silver Maple
The silver maple is a fast-growing native tree commonly found along Illinois’s rivers, streams, and floodplains, typically reaching a mature height of 50 to 80 feet within just a few decades of establishment. This tree gets its common name from the silvery-white undersides of its leaves, which create a distinctive shimmering effect when the foliage moves in the wind across Illinois’s open floodplain landscapes.
Silver maple grows notably quickly, often exceeding 3 feet of height per year under favorable moisture conditions, though this rapid growth is associated with weaker wood more prone to storm damage compared to sugar maple. This tree’s tolerance for periodic flooding makes it a particularly important species along Illinois’s major waterways, including the Illinois, Mississippi, and Wabash river systems.
Red Maple
The red maple is a widely distributed native tree found throughout much of Illinois, typically reaching a mature height of 40 to 60 feet and producing some of the earliest spring color in the state, with small red flowers appearing on bare branches often as early as March. This tree tolerates a broad range of soil and moisture conditions, from swampy lowlands to drier upland forests, though it is somewhat less common in Illinois’s most alkaline prairie soils compared to states farther east.
Red maple displays vivid red fall foliage, one of the more reliable and widespread color displays found throughout Illinois’s autumn landscape in the counties where it thrives. This tree’s remarkable adaptability has also made it a popular choice for Illinois’s urban and suburban landscape plantings.
Black Walnut
The black walnut is a valuable native hardwood found throughout Illinois, typically reaching a mature height of 50 to 75 feet and prized for both its dark, richly grained wood and its large, edible nuts. This tree produces a natural chemical called juglone, released through its roots and fallen leaves, which can inhibit the growth of many other plant species growing nearby, an adaptation that reduces competition for resources.
Black walnut grows best in Illinois’s deep, fertile bottomland soils, and the state remains one of the leading producers of black walnut timber and nuts in the country, supporting a notable regional processing industry. This tree’s wood remains among the most valuable hardwood timber species harvested in Illinois, commanding premium prices for furniture, veneer, and gunstock production.
American Basswood
The American basswood, also called American linden, is a large native shade tree found throughout Illinois’s rich hardwood forests, typically reaching a mature height of 60 to 80 feet. This tree produces small, fragrant yellow-white flowers in early summer that attract enormous numbers of bees, making it one of the most valuable native trees for supporting Illinois’s pollinator populations.
American basswood often resprouts vigorously from its base after being cut or damaged, frequently forming multi-trunked clumps in forests that have experienced past disturbance throughout the state. This tree’s soft, light wood has been historically valued for carving and woodworking, prized for its fine, even grain and resistance to splitting.
American Sycamore
The American sycamore is one of the largest native trees found in Illinois by trunk diameter, commonly growing along the state’s rivers and floodplains, typically reaching a mature height of 75 to 100 feet. This tree is easily identified by its mottled, peeling bark, which reveals patches of white, gray, and tan as older bark sheds away from the trunk and branches throughout the growing season.
American sycamore tolerates periodic flooding exceptionally well, making it one of the dominant large trees found along the Illinois, Kaskaskia, and Rock river corridors. This tree’s massive trunk diameter, which can exceed 10 feet in old, undisturbed specimens, makes it one of the most visually impressive native trees found anywhere in the state.
Eastern Cottonwood
The Eastern cottonwood is one of the fastest-growing native trees found in Illinois, commonly found along the state’s major rivers and floodplains, capable of reaching a mature height of 80 to 100 feet within just a few decades. This tree can grow more than 6 feet in height per year under favorable moisture conditions, making it one of the quickest native trees to reach substantial size anywhere in the state.
Eastern cottonwood produces enormous quantities of cottony, wind-dispersed seeds each spring, an adaptation that allows the species to rapidly colonize newly exposed sandbars and disturbed riverside soil throughout Illinois’s floodplain habitats. This tree’s massive size and rapid growth make it an important component of Illinois’s river corridor ecosystems, particularly along the Mississippi and Illinois rivers.
Green Ash
The green ash was historically one of the most widely planted shade trees throughout Illinois’s urban areas, typically reaching a mature height of 40 to 60 feet with a broad, rounded canopy. This tree tolerates a wide range of soil conditions, including Illinois’s heavy clay and alkaline prairie soils, though its population has declined dramatically due to the emerald ash borer, an invasive insect first detected in the state near Chicago in 2006.
Green ash populations throughout Illinois have suffered severe losses since the pest’s arrival, with many municipalities removing dead and dying ash trees from streets and parks over the past two decades. This tree’s ongoing struggle throughout the state serves as a significant example of the broader forest health challenges posed by invasive insect species in Illinois’s urban and rural landscapes alike.
White Ash
The white ash was historically valued throughout Illinois for its strong, flexible wood used extensively in tool handles, baseball bats, and furniture, though the species has faced severe population declines throughout the state in recent years. This tree typically reaches a mature height of 60 to 80 feet and produces attractive yellow to purple fall foliage when healthy, growing throughout Illinois’s upland and bottomland forests alike.
White ash, like green ash, has been devastated by the emerald ash borer throughout Illinois, with the insect having spread to nearly every county in the state since its initial detection. This tree’s dramatic decline has prompted extensive research into resistant breeding programs and biological control methods aimed at preserving remaining Illinois ash populations.
American Elm
The American elm was once one of the most commonly planted street trees throughout Illinois, valued for its graceful, vase-shaped canopy and mature height that can reach 80 to 100 feet under favorable conditions. This tree suffered devastating losses throughout the state due to Dutch elm disease, which arrived in the United States in the late 1920s and eliminated the vast majority of Illinois’s mature street and forest elms over the following decades, including many of Chicago’s once-famous elm-lined boulevards.
Several disease-resistant American elm cultivars have been developed in recent decades, allowing this tree to make something of a comeback in newer Illinois plantings. This tree’s fast growth rate and excellent historical tolerance for urban conditions continue to make it a valuable option where disease-resistant varieties are specifically selected.
Slippery Elm
The slippery elm is a native tree found throughout Illinois’s forests, typically reaching a mature height of 40 to 60 feet and named for the mucilaginous, slippery inner bark that has long been used in traditional herbal remedies. This tree is somewhat more resistant to Dutch elm disease than the American elm, though it has still experienced population declines throughout the state since the disease’s arrival in the early 20th century.
Slippery elm produces rough, sandpaper-textured leaves that help distinguish it from the smoother-leaved American elm growing in similar Illinois forest habitats. This tree’s inner bark was historically harvested and dried for use in soothing sore throats and digestive complaints, a practice that continues in some traditional herbal medicine circles today.
Hackberry
The hackberry is one of the most widespread and adaptable native trees found throughout Illinois, typically reaching a mature height of 40 to 60 feet and tolerating an exceptionally wide range of soil conditions, including the state’s heavy clay and alkaline prairie soils. This tree produces small, sweet berries that ripen in fall and serve as an important food source for numerous bird species throughout Illinois.
Hackberry is easily identified by its distinctive warty, corky bark texture, a feature that makes the species recognizable even without leaves present during Illinois’s dormant winter months. This tree’s strong tolerance for urban stresses, including drought, pollution, and poor soil, has made it an increasingly popular street tree choice throughout Illinois’s cities as ash tree populations continue to decline.
Black Cherry
The black cherry is one of Illinois’s most commercially valuable native hardwood species, found throughout the state’s upland forests, typically reaching a mature height of 50 to 80 feet. This tree produces small white flowers in spring, followed by dark purple-black fruit that provides an important food source for numerous bird species throughout Illinois’s forests.
Black cherry grows relatively quickly for a hardwood species, often reaching substantial size within 60 to 80 years under good forest conditions found throughout the state’s wooded regions. This tree’s rich, reddish-brown wood, which darkens attractively with age, has made Illinois-grown black cherry a valuable component of the state’s hardwood furniture and woodworking industries.
Eastern Redbud
The Eastern redbud is a small native ornamental tree found throughout Illinois’s forest edges and understory, producing a striking display of magenta-pink flowers directly along its bare branches each spring before the leaves emerge. This tree typically reaches a mature height of 20 to 30 feet and grows successfully across most of the state, though it becomes somewhat less reliably hardy in Illinois’s coldest northern counties near the Wisconsin border.
Eastern redbud features attractive heart-shaped leaves that turn a pleasant yellow color each fall, adding a second season of visual interest beyond its notable spring bloom period. This tree’s relatively compact size and vivid early spring color have made it one of the most popular native ornamental trees planted throughout Illinois’s residential landscapes.
Flowering Dogwood
The flowering dogwood produces a spectacular display of white or pink bracts each spring, typically reaching a mature height of 15 to 30 feet, and grows naturally throughout Illinois’s southern and central forested regions. This tree naturally grows as an understory species, thriving in the dappled shade found beneath larger canopy trees throughout Illinois’s oak-hickory woodlands, particularly in the southern third of the state near Shawnee National Forest.
Flowering dogwood becomes less reliably hardy toward Illinois’s northern counties, where colder winter temperatures can limit its successful establishment and growth. This tree’s bright red fall berries provide an important food source for migrating birds, and its attractive layered branching structure adds visual interest to the Illinois landscape throughout every season.
Serviceberry
The serviceberry is a versatile small native tree found throughout Illinois’s forest understory and edges, typically reaching a mature height of 15 to 25 feet with clusters of white flowers in early spring followed by small, sweet, blueberry-like fruit in early summer. This tree is often among the first native species to bloom each spring throughout the state, historically giving rise to its common name, since the flowering coincided with the return of circuit-riding preachers able to travel again after winter thaws.
Serviceberry fruit is highly attractive to birds and was historically an important food source gathered by Indigenous communities and early Illinois settlers. This tree also produces excellent orange to red fall color, adding a third season of visual interest beyond its spring flowers and summer fruit.
Kentucky Coffeetree
The Kentucky coffeetree is a hardy, adaptable shade tree found in scattered native populations throughout Illinois, and it is also increasingly planted as an urban street tree, typically reaching a mature height of 50 to 70 feet. This tree tolerates urban stresses including drought, pollution, and Illinois’s heavy clay soils with relative ease, making it well suited to the state’s challenging city growing environments.
Kentucky coffeetree features bold, coarse-textured compound leaves and large, leathery seed pods that were historically roasted as a coffee substitute by early Illinois settlers, giving the tree its common name. This tree’s strong branch structure and resistance to storm damage have made it an increasingly popular choice for street tree plantings throughout Chicago and other Illinois cities in recent years, particularly as a replacement for declining ash populations.
Honeylocust
The honeylocust is a hardy native tree found throughout Illinois, typically reaching a mature height of 40 to 60 feet with an open, airy canopy that allows dappled light to reach the ground below. This tree tolerates a wide range of soil conditions, including Illinois’s heavy clay and compacted urban soils, making it one of the most commonly planted street trees throughout the state’s cities.
Most landscape honeylocust trees planted today are thornless, seedless cultivars, avoiding the sharp thorns and messy seed pods found on the wild native form common throughout Illinois’s floodplain forests. This tree’s fine-textured, compound leaves produce light, dappled shade that allows grass and other plants to grow successfully beneath its canopy, a valuable trait in urban landscape settings throughout the state.
Black Locust
The black locust is a fast-growing native tree found throughout much of Illinois, particularly common on disturbed sites and forest edges, typically reaching a mature height of 40 to 60 feet. This tree produces fragrant white flower clusters in late spring that provide an important early-season nectar source for bees throughout the state.
Black locust has a unique ability to fix atmospheric nitrogen through a symbiotic relationship with soil bacteria, allowing it to thrive in poor, nutrient-depleted soils where many other trees struggle to establish across Illinois’s disturbed and reclaimed land areas. This tree’s extremely dense, rot-resistant wood has made it historically valuable for fence posts and other applications requiring long-term ground contact durability throughout Illinois’s rural landscape.
Osage Orange
The Osage orange is deeply tied to Illinois’s agricultural history, having been planted extensively throughout the state during the mid-1800s as a living fence material before the widespread adoption of barbed wire. This tree typically reaches a mature height of 30 to 40 feet and produces large, bumpy, bright green fruit, often called hedge apples, that can measure up to 5 inches in diameter.
Osage orange wood is exceptionally dense, rot resistant, and historically valued for fence posts and archery bows, prized by Indigenous communities long before European settlement of the region. This tree’s dense, thorny growth habit made it an effective living barrier for containing livestock throughout Illinois’s prairie farmland, and remnant hedgerows planted more than a century ago can still be found dividing fields across much of the state today.
Eastern Hophornbeam
The Eastern hophornbeam is a smaller native understory tree found throughout Illinois’s upland forests, typically reaching a mature height of 25 to 40 feet with distinctive shredded, flaky gray-brown bark. This tree produces papery, hop-like seed clusters that give the species its common name and provide a valuable food source for birds and small mammals throughout Illinois’s woodlands.
Eastern hophornbeam has exceptionally hard, dense wood, historically earning it the alternate common name ironwood among Illinois settlers who valued the timber for tool handles and other applications requiring durability. This tree’s tolerance for shade makes it a common component of the understory layer throughout Illinois’s mature oak-hickory forest communities.
American Hornbeam
The American hornbeam, sometimes called blue beech or musclewood, is a small native understory tree found throughout Illinois’s moist bottomland forests, typically reaching a mature height of 20 to 30 feet. This tree gets its common name musclewood from its smooth, gray bark, which develops a distinctive rippled, muscle-like texture as the tree matures.
American hornbeam favors the shaded, moist soils found along Illinois’s streams and in low-lying forest areas, thriving in conditions too wet or shady for many other native tree species. This tree’s exceptionally hard, dense wood and attractive orange to red fall color have made it an increasingly popular choice for native landscaping throughout Illinois’s woodland garden designs.
Sassafras
The sassafras is a distinctive native tree found throughout Illinois, easily recognized by its unusual leaves, which can appear in three different shapes, including oval, mitten-shaped, and three-lobed forms, sometimes all on the same branch. This tree typically reaches a mature height of 30 to 60 feet and produces small yellow flowers in early spring, followed by dark blue berries on red stems that provide an important food source for birds.
Sassafras roots and bark carry a distinctive spicy, root-beer-like fragrance, historically used to flavor traditional root beer and various other beverages before safety concerns limited commercial use of the tree’s oil. This tree’s brilliant orange, red, and yellow fall color, often displaying multiple shades simultaneously, makes it one of the most visually striking native trees found throughout Illinois’s forest edges and understory.
American Persimmon
The American persimmon is a native fruit tree found primarily throughout southern and central Illinois, typically reaching a mature height of 35 to 60 feet and producing sweet, orange fruit that ripens after the first frost each fall. This tree is notably drought tolerant and adapts well to a range of soil conditions, though it grows most abundantly in the sandier, well-drained soils found throughout southern Illinois.
American persimmon fruit, while astringent and unpalatable before full ripeness, becomes remarkably sweet once properly ripened, historically used by Indigenous communities and early Illinois settlers for puddings and baked goods. This tree’s fruit also serves as an important late-season food source for opossums, raccoons, and deer throughout the southern Illinois woodlands where the species is most common.
Pawpaw
The pawpaw is a distinctive small native tree found in the understory of southern Illinois’s forests, particularly throughout the Shawnee National Forest region, typically reaching a mature height of 15 to 25 feet. This tree produces the largest edible fruit native to North America, with a custard-like texture and tropical flavor often compared to a combination of banana and mango.
Pawpaw often grows in dense, spreading colonies connected by a shared root system, since the species spreads readily through root suckering in the moist, shaded bottomland forests it favors. This tree’s unusual dark maroon flowers, pollinated primarily by flies and beetles rather than bees, bloom in early spring before the tree’s large, drooping leaves fully emerge throughout southern Illinois’s forest understory.
Bald Cypress
The bald cypress reaches the northernmost extent of its natural range in the swamps of extreme southern Illinois, particularly within the Cache River watershed near the Cypress Creek area, home to some of the oldest and northernmost naturally occurring bald cypress trees in North America. This tree typically reaches a mature height of 60 to 100 feet and is unusual among conifers for being deciduous, dropping its needle-like foliage each fall after displaying attractive coppery-orange color.
Bald cypress produces distinctive knobby root growths called knees that protrude above the water surface in swampy habitat, though their exact biological function remains a subject of ongoing scientific discussion. This tree’s presence in southern Illinois represents a remarkable ecological outlier, with some individual trees in the Cache River area estimated to be more than 1,000 years old.
Overcup Oak
The overcup oak is a native tree found in southern Illinois’s bottomland hardwood forests, typically reaching a mature height of 40 to 60 feet and named for its distinctive acorn cap, which almost entirely encloses the nut inside. This tree tolerates prolonged flooding and standing water exceptionally well, often growing in the lowest, wettest portions of southern Illinois’s floodplain forests where few other oak species can successfully establish.
Overcup oak grows relatively slowly, and its wood has historically been considered less commercially desirable compared to other bottomland oak species, though it remains ecologically important for wildlife food and habitat. This tree’s remarkable flood tolerance makes it a defining species of the seasonally inundated forests found throughout southern Illinois’s Mississippi and Ohio River floodplain regions.
Pecan
The pecan reaches a natural northern range limit in southern Illinois’s bottomland forests, particularly along the state’s major southern rivers, typically reaching a mature height of 70 to 100 feet in favorable growing conditions. This tree produces valuable, sweet-flavored nuts and requires deep, fertile, well-drained bottomland soil to thrive, conditions found primarily throughout southern Illinois’s river valley regions.
Pecan trees grown in Illinois’s more marginal northern range typically produce smaller nut crops compared to trees grown farther south, since the species benefits from a longer, warmer growing season. This tree’s substantial mature size and long lifespan, often exceeding 200 years, make it one of the more impressive native trees found within southern Illinois’s river bottom forests.
Sweetgum
The sweetgum reaches its natural range limit in southern Illinois, typically found throughout the Shawnee National Forest region, reaching a mature height of 60 to 75 feet and valued for its exceptional, multicolored fall foliage display. This tree’s star-shaped leaves turn vivid shades of yellow, orange, red, and purple in autumn, often displaying several of these colors simultaneously on the same tree throughout southern Illinois’s forests.
Sweetgum produces distinctive spiky seed pods, sometimes called gumballs, which persist on the tree through much of the winter and are considered by some homeowners to be a landscape maintenance drawback due to the litter they create. This tree’s presence marks one of several southern species that reach their natural northern limits within Illinois’s southernmost counties.
Tuliptree
The tuliptree, sometimes called yellow poplar, reaches near the northern edge of its natural range within southern Illinois’s forests, capable of reaching a mature height of 80 to 120 feet under favorable growing conditions. This tree produces distinctive tulip-shaped flowers in late spring, typically high in the canopy and easily overlooked despite their attractive yellow-green and orange coloration.
Tuliptree grows remarkably fast for a large hardwood, often exceeding 3 feet of height per year during its early decades of growth, making it one of the quickest native trees to reach substantial size where it occurs within the state. This tree’s tall, straight trunk and minimal lower branching have made it historically valuable for lumber production throughout the parts of southern Illinois where it grows naturally.
Shortleaf Pine
The shortleaf pine is the only pine species native to Illinois, found in a limited natural range throughout the rocky, sandstone terrain of Shawnee National Forest in the state’s southernmost counties. This tree typically reaches a mature height of 80 to 100 feet with a notably straight, tall trunk and is unique among southeastern pines for its ability to resprout from its base after fire or significant damage.
Shortleaf pine populations in Illinois represent a genuine ecological rarity within the state, since the vast majority of Illinois’s native forest composition consists of hardwood rather than coniferous species. This tree’s presence in the Shawnee Hills region adds to the area’s reputation as one of the most ecologically distinctive and biologically diverse parts of Illinois.
Eastern Red Cedar
The Eastern red cedar, technically a juniper species rather than a true cedar, is one of the most widespread native conifers found throughout Illinois, typically reaching a mature height of 30 to 50 feet and thriving in a remarkably wide range of soil and moisture conditions. This tree is often among the first woody species to colonize abandoned farmland and disturbed sites throughout the state, playing an important early role in Illinois’s forest succession process on former agricultural land.
Eastern red cedar produces small, bluish, berry-like cones that provide an important winter food source for numerous bird species, particularly cedar waxwings, which take their name from their fondness for this tree’s fruit. This tree’s dense, aromatic, rot-resistant wood has been historically valued for fence posts and cedar chests throughout Illinois’s rural communities.
Quaking Aspen
The quaking aspen reaches the southern edge of its extensive North American range within Illinois’s northernmost counties, typically found in scattered populations near the Wisconsin border, reaching a mature height of 40 to 60 feet. This tree is known for its distinctive white bark and leaves that flutter dramatically in even light wind, caused by the flattened shape of the leaf stem connecting each leaf to its branch.
Quaking aspen often grows in interconnected groves that share a single root system, with individual trunks technically functioning as a single genetically identical organism across a shared area. This tree’s presence in northern Illinois represents one of the more southerly natural occurrences of a species primarily associated with the northern United States and Canada.
Paper Birch
The paper birch is found only in isolated, relict populations within Illinois’s northernmost counties, representing one of the southernmost natural occurrences of this predominantly northern species anywhere in the Midwest. This tree typically reaches a mature height of 40 to 60 feet and is easily recognized by its striking white, papery bark that peels away in thin horizontal strips.
Paper birch requires cooler temperatures and specific site conditions than much of Illinois offers, generally limiting its natural survival to a handful of protected sites near the state’s border with Wisconsin. This tree’s rarity within Illinois has made surviving populations a notable focus for conservation attention among the state’s natural areas management programs.
River Birch
The river birch is a fast-growing native tree found along Illinois’s streams, rivers, and floodplain areas throughout much of the state, typically reaching a mature height of 40 to 70 feet and valued for its attractive, peeling, cinnamon-colored bark. This tree tolerates wet, poorly drained soils considerably better than most other birch species, making it particularly well suited to the floodplain habitats found throughout Illinois’s river systems.
River birch is notably more resistant to the bronze birch borer, a damaging pest, compared to some other birch species, contributing to its continued popularity as both a native forest tree and a common landscape planting throughout the state. This tree’s multi-stemmed growth habit and attractive exfoliating bark provide year-round textural interest throughout Illinois’s residential and park landscapes.
American Beech
The American beech is found throughout Illinois’s eastern and southern forested regions, typically reaching a mature height of 50 to 70 feet and capable of living for more than 300 years under favorable conditions. This tree is easily recognized by its smooth, light gray bark, which remains notably smooth even as the tree ages, unlike the furrowed bark typical of most other large hardwoods found in the state.
American beech produces nutritious beechnuts that serve as an important food source for wildlife throughout the mature forest stands found in Illinois’s more heavily wooded eastern and southern counties. This tree’s tendency to retain dried, tan-colored leaves through much of the winter makes it one of the more easily identifiable native trees found across Illinois’s dormant winter landscape.
Ohio Buckeye
The Ohio buckeye is a native tree found throughout Illinois’s rich bottomland and upland forests, typically reaching a mature height of 30 to 40 feet with a rounded, dense canopy. This tree produces showy clusters of yellow-green flowers in spring, followed by distinctive spiny seed pods containing the shiny brown seeds that give the tree its common name.
Ohio buckeye tends to drop its leaves earlier in late summer compared to many other shade trees, an adaptation to heat and drought stress that becomes more pronounced during Illinois’s hottest, driest years. This tree’s early fall color and interesting seed pods provide multi-season visual interest throughout the forests and larger properties where it grows across the state.
Northern Catalpa
The northern catalpa is native to a relatively small historic range centered on the lower Midwest, including parts of southern Illinois, though it has since been widely planted throughout the entire state as an ornamental shade tree. This tree typically reaches a mature height of 40 to 60 feet with large, heart-shaped leaves and showy white flower clusters in early summer.
Northern catalpa produces long, bean-like seed pods that can persist on the tree well into winter, adding a distinctive visual element to the bare winter landscape throughout Illinois. This tree’s large leaf size and bold, tropical-looking foliage make it a popular choice for adding dramatic textural contrast to Illinois residential and park landscapes statewide.
Ginkgo
The ginkgo is a highly resilient ornamental shade tree widely planted throughout Illinois’s urban areas, typically reaching a mature height of 40 to 50 feet and valued for its unique, fan-shaped leaves that turn a brilliant, uniform gold each fall. This tree is highly tolerant of urban pollution, compacted soil, and Illinois’s heavy clay conditions, making it particularly well suited to street tree plantings throughout the state’s more developed cities, including Chicago.
Ginkgo grows relatively slowly compared to many other large shade trees, often taking 20 years or more to reach substantial landscape size, but rewards patience with a lifespan that can exceed several centuries. This tree is considered a living fossil, with a lineage tracing back more than 200 million years, making it one of the oldest tree species still commonly planted in Illinois’s cities today.
Littleleaf Linden
The littleleaf linden is a popular ornamental shade tree widely planted throughout Illinois’s urban and suburban landscapes, typically reaching a mature height of 40 to 50 feet with a distinctive pyramidal to oval canopy shape. This tree produces small, fragrant yellow-white flowers in early summer that attract large numbers of bees, making it a valuable addition for supporting pollinator populations in developed areas throughout the state.
Littleleaf linden tolerates urban conditions well, including compacted soil and Illinois’s alkaline clay, making it a common choice for street tree plantings throughout many of the state’s cities and suburbs. This tree’s dense, uniform growth habit and strong tolerance for pruning have made it a popular formal shade tree choice throughout Illinois’s more developed landscapes, particularly across the Chicago metropolitan area.
London Plane Tree
The London plane tree, a hybrid closely related to the American sycamore, is one of the most widely planted large shade trees throughout Illinois’s urban areas, typically reaching a mature height of 70 to 100 feet. This tree tolerates the state’s varied urban growing conditions exceptionally well, including compacted soil, air pollution, and road salt exposure, all significant considerations throughout Illinois’s older cities.
London plane tree produces distinctive mottled, peeling bark similar to its sycamore relatives, along with large, maple-like leaves that provide substantial cooling shade along city streets. This tree’s strong tolerance for regular pruning has made it a popular choice for formal street tree plantings throughout Chicago and many of Illinois’s other historic urban districts.
Flowering Crabapple
The flowering crabapple is one of the most popular small ornamental trees planted throughout Illinois, valued for its dramatic spring flower display in shades of white, pink, or deep red, typically reaching a mature height of 15 to 25 feet. This tree tolerates Illinois’s cold winters and heavy clay soils well, making it a reliable choice for adding seasonal color to residential landscapes across the state’s different climate zones.
Many crabapple varieties also produce small, colorful fruit that persists into winter, providing an important food source for robins and other birds during the colder months when other food options become scarce. This tree’s compact size and reliable spring bloom have made it one of the most commonly planted ornamental trees throughout Illinois’s suburban neighborhoods.