Trees by Arbor Walk Number

Also known as the Persian ironwood, the Persian Parrotia is known for its exfoliating bark which is particularly noticeable in the winter. When young, its leaves are reddish purple, and as it matures they will become dark green in the summer and yellow, orange, and red in the fall.

This tree is native to Japan, although it has become endangered within its own native range. This cultivar was introduced at the Morton Arboretum in Illinois.

The Yoshino Cherry is a beautiful tree with slightly fragrant, pinkish white flowers that appear in early spring. There are numerous Yoshino Cherry Trees that line the stairs by the Olin Law School that form an allée.

The Lacebark Elm is a large elm native to China that is known for its intricate bark and durable wood. It has strong resistance to the deadly Dutch Elm Disease, making it an ideal planting or hybridization target.

The London Planetree is a hybrid of the Oriental Plane (Platanus orientalis) and American Sycamore (Platanus occidentalis), combining improved disease resistance with cold tolerance. The London Planetree is also extremely tolerant of pollution, and is even found to be an effective removal agent of air pollution particles.

This tree is a “seedless” variety of the native species. It is native to Missouri and the Midwest. Early settlers of Kentucky used the tree’s seeds as a coffee substitute, hence its common name.

This small flowering tree belongs to a family of trees that are popular for their profuse spring flowers. This tree also produces its namesake crabapples, which are edible except for the seed, yet very small. Arbor Walk #11 has a dome-like shape and students often study underneath the tree’s canopy in hotter months.

This tree’s unique fan shaped leaves turn brilliant golden yellow in fall. This adjacent group of Ginkgos forms a historic allée that was part of the original 1927 Cope and Stewardson Plan for the university campus.

This native tree’s common name comes from its flower that is shaped like a tulip. In 1991, WashU was given this tree as a seedling. It was grown from seed taken from the original Tulip Trees planted by George Washington in 1785 at his Mount Vernon home.

This beautiful non-native tree is adaptable to the Midwest. It has golden bronze leaves in the fall and its bark has a gray, elephant-hide appearance.

This tree’s star shaped leaves provide great fall color. Its fruits are the spiky “gum balls” which can hang on the tree all winter.

This tree is native to wetlands and swamps in the Midwest but is adaptable to urban conditions. Its needlelike foliage turns russet red and drops in the fall.

The pin oak is a popular tree that is planted because of its quick growth and the dense shade it provides. It has a distinct form that is pyramidal during early maturity but turns more oval later in life.

This large native tree has a simple, small leaf, and a finer texture than most oak trees. It is considered a medium to large oak, can grow over 100 feet tall, and is native to the Southeastern portion of the United States, including Missouri.

This tree’s unique foliage, summer blooming yellow flowers, and lantern-like fruit make it one of the most interesting trees in the campus forest.

The Kwanzan variety is probably the hardiest of the double flowering cherry trees. Its new leaves are bronze colored and its fall color is a bronzy-orange. It blooms pink in mid spring and is the last of the cherry trees to bloom.

The Red Horsechestnut is a hybrid between the European Aesculus hippocastanum (Horsechestnut) and the North American A. pavia (Red Buckeye). This small deciduous tree grows on average to medium moist well drained soil, in full to part sun.

This lovely mature tree has shaded the west side of Olin Library for generations of students but sadly came down in a storm in July 2023. The Sugarberry is known for its distinctive corky bark and edible berries.

The American Elm is native to much of Eastern North America and grows in low, moist areas and along streams across the state of Missouri.

The Black Gum, also called Tupelo, is a Missouri native and flexible mid-western species capable of growing in both standing water and rocky slopes.

This tree is a Missouri native which grows easily in fertile, moist soil. In the wild, it typically grows at forest transition boundaries, along stream banks, or in the margins of limestone glades.

This tree species is originally native to the Himalayas range, but due to its high tolerance to heat for a true cedar, it is able to grow in certain specific conditions in the United States such as the St. Louis area.

This low-maintenance deciduous shade tree is native to much of the Eastern US and in Southeast Missouri, usually in low, wet, woodland areas or along stream beds. It has a variety of human-use applications such as chewing gum, incense, perfume, and medicine.

A type of maple originally native to the mixed forests of Central China, this species was introduced to the West through England in 1899 and transplanted to America soon after.

The Bald Cypress is the state tree of Louisiana. Despite its resemblance to a needled evergreen tree in the summer, it is actually deciduous. The ‘Mickelson’ is a cultivar of the Bald Cypress, and has a narrower shape and denser foliage than the native species.

This deciduous understory tree is the state tree of Oklahoma and is native to Missouri and much of the Eastern and Central US. It grows in medium moisture, medium fertility soils.

A naturally occurring hybrid species of American Holly and Dahoon Holly, it was found growing in the wild in Florida in 1924. This is a broadleaf evergreen tree of small to medium stature that prefers well-drained, slightly acidic soil and dislikes extreme hot and cold temperatures.

This Missouri native tree offers edible, berry-like fruit that changes color throughout the seasons. The competition for the fruit is stiff because they are a favorite of many bird species.

This tree, native to Asia, is known for its four-petaled white flowers in June and its reddish-purple color in Fall.

The Little-Leaf Linden is uniquely adept at withstanding polluted environments, and is therefore a great shade tree for urban settings. It is a native to Europe and exists in the wild only in protected pockets of land, where it provides ecological benefits for moths and pollinators.

The White Oak is one of the most ubiquitous trees in all of the eastern United States. The White Oak is the state tree of Illinois, Connecticut, and Maryland, and numerous trees along the East Coast have stood in towns or cities since before European occupation.

This medium-sized tree is hardy and tolerant to drought, heat, and poor soil which make it well suited as a replacement for the many elms used residential landscapes and city streets.

This iconic tree is native to much of Eastern North America, where it is a dominant component of hardwood forests from Canada to Missouri.

This small tree is a Missouri and Chicago-region native offering attractive bright red fruit and beautiful color in the fall.

This tree has dark green leaves which turn bronze in the fall. Its flowers are yellowish-green, and the female flowers yield edible beechnuts which ripen in the fall.

Often used as a shade tree in lawns and along streets because it grows to a large size. It is native to southeastern Missouri.

This tree is native to Eastern North America; In Missouri, it grows in a variety of habitats across the state and is tolerant of a wide range of soil conditions.

This Asian hybrid Elm is a relatively small cultivar growing 35 feet high and 25 feet wide. It has glossy green leaves which turn yellow in the fall.

Often claimed as the most beautiful of North America’s native flowering trees, the Flowering Dogwood is the state tree of both Missouri and Virginia. Its early-spring blooms of showy white petals surrounding tiny clusters of yellow dogwood flowers are among the tree’s most dramatic characteristics.

This Missouri native tree is predominantly found in the Mississippi River Valley, and in the American South where it is cultivated as an important commercial nut crop.

This shade tree is a Missouri native to floodplains. It produces acorns that, unlike most, can be eaten straight from the tree without needing to be boiled.

Though adaptable to most soils, this Missouri native tree is particularly prevalent in lowlands, floodplains, swamps and bayous in the Southeastern US and in the Mississippi River Valley.

Native to the Atlantic coast of the United States, the Sweetbay Magnolia MOONGLOW features creamy white flowers which bloom late spring and into summer, and are known for their sweet ‘lemony’ scent.

This Midwest native’s beautiful dense crown provides good shade, and along with its ability to tolerate air pollution and drought, has made it a landscaping favorite.

A member of the Elm family which has been promoted as a replacement to American Elms because of its high degree of resistance to Dutch Elm Disease.

The Sycamore is regarded as one of the largest trees native to eastern North America, and was historically prized by Native Americans for the construction of dugout canoes. Ecologically, they are early colonizers to newly available habitat, and support animal shelters as they mature.

The Seven-Son Flower is a large deciduous shrub with a fountain head that terminates in creamy white flower clusters. This plant is native to China, and provides a good source of nectar for butterflies.

The Downy Hawthorn is a deciduous tree in the rose family, and is native to the Midwest. Despite the unpleasant scent and the presence of long thorns, the tree is much loved for the beauty of its flowers in the spring and fruits in the summer.

This unique pest-resistant species originated in China and is the last species in its order Ginkgophyte, which was first found in fossils that dated back to the Permian period, 270 million years ago.

This European spruce is often planted in temperate regions of the United States as a wind blocker, as it can grow quickly and reach an average height of 60 feet in artificial habitats. The tree’s early branches are tilted upwards, but over time the branches adopt a more open and perpendicular stance.

The Sawtooth Oak is a medium sized deciduous tree, growing 40-60 feet tall with a broad-spreading, rounded crown. It is native to China, Korea and Japan and grows yellow-green flowers and oval acorns with spiny, scaly cups.

This cultivar of the Scotch Elm, known as the Camperdown Elm, is a large deciduous tree with a rounded crown and bowing, drooping branches. While the wild-type Scotch Elm may reach 70′-100′ in height, the Camperdown Elm will not grow above 30′ tall.

This atypical oak lacks the normal lobed leaf structure seen in other oak species. Its common name derives from the fact that early settlers in the Midwest often used wood from the tree to shingle their roofs.

‘Bailsta’ is a cultivar of the Sugar Maple. It can grow to 50′ tall by 40′ wide, with a much wider, more rounded form than most Sugar Maples.

A tree native to the Eastern and Midwestern United States, River Birch is also known as black birch. As a relatively heat resistant tree in the birch family, the river birch tree’s distribution extends further south than most other birch trees. 

The ‘Cully’ cultivar of the River Birch was discovered in a St. Louis, Missouri suburb and introduced by Earl Cully, a well known arborist from Illinois. The ‘Cully’ grows 40’ tall and 40’ wide.

The ‘Autumn Gold’ evolved over 200 million years ago and can withstand extremely harsh conditions. The tree produces a beautiful gold leaf color in Autumn, hence the name.

Hazel Alder is a multi-stemmed small tree and can grow to 20′ high and up to 15′ wide forming thickets by suckering. It is native from Nova Scotia to Illinois and Missouri south to eastern Texas and northern Florida. It is an ideal selection for naturalizing or rain gardens.

English Oak is native and found in mixed woodland areas and planted widely in North America since the 1600s. It has long been a timber source in England.

Three Flowered Maple is a small understory tree and grows to 30′ tall. Features of this tree include exfoliating bark and fall color of orange to red foliage.