Downy Serviceberry

Downy Serviceberry

Arbor walk #40, Treekeeper ID #4578

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.

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Dwarf Chinkapin Oak

Arbor Walk #156

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Eastern Cottonwood

Eastern Cottonwood

Arbor Walk #167

Native to much of the Eastern United States and Southern Canada, with a tall form reaching up to 100 feet in height and flexible fluttering leaves, the Eastern Cottonwood is a staple of lowlands across North America.

Eastern Red Cedar

Eastern Red Cedar

Arbor walk #51, Treekeeper ID #1648

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.

Eastern Redbud

Eastern Redbud

Arbor walk #38, TreeKeeper ID #3141

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.

Eastern Redbud, White

Eastern Redbud, White

Arbor Walk #86, Treekeeper ID #5725

White Bud is a native cultivar to the Missouri Area with heart-shaped leaves. Its parentage comes from the native Red Bud seen throughout Missouri.

Eastern Wahoo

Eastern Wahoo

Arbor walk #47, Treekeeper ID #6770

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

Eastern White Pine

Eastern White Pine

Arbor Walk #134

The Eastern White Pine (Pinus strobus) is considered to be the tallest tree east of the Rocky Mountains, and one of the most historically important. This tree, which ranges from 80' up to 180+' at its record tallest, was the premier tree for timber in North America in the 18th and 19th century. Due to its massive demand in furniture, construction, and farming, stands of this pine were dramatically wiped out by 1900.

Emerald Sunshine Elm

Emerald Sunshine Elm

Arbor walk #52, Treekeeper ID #1676

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.

English Oak

English Oak

Arbor walk #99, Treekeeper ID #6570

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.

English Yew

English Yew

Arbor walk #65, Treekeeper ID #5329

Though associated with England, this tree is actually native to all of Europe, as well as southwestern Asia and Northern Africa. Red-brown scaly bark and evergreen dark green foliage ensures this tree is an attractive addition to landscapes year-round.

European Beech

European Beech

Arbor walk #14, Treekeeper ID #1691

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.

European Hornbeam

European Hornbeam

Arbor walk #74, Treekeeper ID #2259

This adaptive species is often grown as a shield or hedge plant in urban settings, as it grows a thick canopy that extends most of the way to the ground.

Flowering Dogwood

Flowering Dogwood

Arbor walk #53, Treekeeper ID #1410

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.

Flowering Dogwood

Flowering Dogwood

Arbor walk #81, Treekeeper ID #3692

This is a small, beautiful, adaptive, flowering tree, blooming in early spring. It has white flowers and oval dark green leaves which turn into shades of red in the fall and it grows bitter, inedible bright red fruits.

Foster Holly

Foster Holly

Arbor walk #39, Treekeeper ID #4373

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.

Fringe Tree

Fringe Tree

Arbor walk #33, Treekeeper ID #5592

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.

Full Moon Maple

Full Moon Maple

Arbor Walk #135

The Full Moon Maple is a small, dense tree with unique large, showy leaves that is native to Japan. These leaves create beautiful fall foliage and are mainly sought after for landscaping.

Giant Dogwood

Giant Dogwood

Arbor Walk #165, Treekeeper ID #7247

The Giant Dogwood is a medium sized tree (50-60 feet at tallest) native to East Asia.

Ginkgo

Ginkgo

Arbor walk #12, Treekeeper ID #1649

THE CONSENT
Late in November, on a single night
Not even near to freezing, the ginkgo trees
That stand along the walk drop all their leaves
In one consent, and neither to rain nor to wind
But as though to time alone: the golden and green
Leaves litter the lawn today, that yesterday
Had spread aloft their fluttering fans of light.
What signal from the stars? What senses took it in?
What in those wooden motives so decided
To strike their leaves, to down their leaves,
Rebellion or surrender? and if this
Can happen thus, what race shall be exempt?
What use to learn the lessons taught by time,
If a star at any time may tell us: Now.
Ginkgo

Ginkgo

Arbor walk #76, Treekeeper ID #5991

THE CONSENT
Late in November, on a single night
Not even near to freezing, the ginkgo trees
That stand along the walk drop all their leaves
In one consent, and neither to rain nor to wind
But as though to time alone: the golden and green
Leaves litter the lawn today, that yesterday
Had spread aloft their fluttering fans of light.
What signal from the stars? What senses took it in?
What in those wooden motives so decided
To strike their leaves, to down their leaves,
Rebellion or surrender? and if this
Can happen thus, what race shall be exempt?
What use to learn the lessons taught by time,
If a star at any time may tell us: Now.
Ginkgo

Ginkgo

Arbor walk #96, Treekeeper ID #5779

THE CONSENT
Late in November, on a single night
Not even near to freezing, the ginkgo trees
That stand along the walk drop all their leaves
In one consent, and neither to rain nor to wind
But as though to time alone: the golden and green
Leaves litter the lawn today, that yesterday
Had spread aloft their fluttering fans of light.
What signal from the stars? What senses took it in?
What in those wooden motives so decided
To strike their leaves, to down their leaves,
Rebellion or surrender? and if this
Can happen thus, what race shall be exempt?
What use to learn the lessons taught by time,
If a star at any time may tell us: Now.
Golden Larch

Golden Larch

Arbor Walk #116

One of the more unique members of the Pine family (Pinaceae), this tree has a circular spray of soft, thick needles and mature cones that resemble upside down succulents or artichokes. Originating from eastern China, this species thrives in the warm, wet environments of the American Midwest and Southeast.

Golden Raintree

Golden Raintree

Arbor walk #24, Treekeeper ID #3978

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.

Green Ash

Green Ash

Arbor walk #23, Treekeeper ID #2384

This native tree species is threatened by the Emerald Ash Borer. Since its discovery in 2002, the Borer, a native of Asia, has killed hundreds of millions of ash trees in North America.

Hardy Rubbertree

Hardy Rubbertree

Arbor Walk #120

This tree gets its name from the gummy sap contained in the tree's leaves, branches, and bark, which does not pour out like a milkweed but rather pulls apart with sticky strings like half-dried glue. Native to China, this tree has been traditionally used to treat high blood pressure, liver, and kidney issues.

Hazel Alder

Hazel Alder

Arbor walk #97, Treekeeper ID #6102

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.

Hybrid Elm

Hybrid Elm

Arbor walk #44, Treekeeper ID #2942

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.

Hybrid Magnolia

Hybrid Magnolia

Arbor walk #90, Treekeeper ID #5902

Magnolia 'Lois' is adaptive to the St. Louis region and was introduced in 1998 by the Brooklyn Botanical. It flowers in the Spring with a true pale yellow color and it grows to 30' tall and 20' wide.

Hybrid Magnolia

Hybrid Magnolia

Arbor walk #82, Treekeeper ID #3854

This is a deciduous hybrid magnolia resulting from a cross between M. acuminata and M. denudata. It is notable for its yellow flowers, late vegetative growth, compact pyramidal form, and ability to withstand both heat and cold.

Hybrid Oak

Hybrid Oak

Arbor Walk #125

The Heritage Oak is a hybrid between the English Oak (Quercus robur) and the Bur Oak (Quercus macrocarpa), two similar white oaks from different continents. These closely related species produce a sturdy, fast-growing oak with the large acorns of the Bur Oak and fall colors of the English Oak.

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Hybrid Willow

Arbor Walk #117

This willow is a hybrid between the Bay Willow (Salix pentandra) and the Eastern Crack-willow (Salix euxina). It was developed at North Dakota State University and is known for its rounded shape, vigorous foliage, and its namesake reflective leaves that lend the 'Silver Lake' epithet.

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Jack’s Hybrid Oak

Arbor Walk #146, Treekeeper ID #6549

This oak is a naturally occurring hybrid of White Oak (Quercus alba) and Swamp White Oak (Q. bicolor).

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Japanese Cornel Dogwood

Arbor Walk #113

The Japanese Cornel Dogwood boasts elegantly characteristic dogwood leaves, edible fruits (yet quite astringent when raw), and traditional medicinal use in East Asia for liver and kidney illnesses.

Japanese Flowering Cherry

Japanese Flowering Cherry

Arbor walk #25, Treekeeper ID #4120

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.

Japanese Flowering Crabapple

Japanese Flowering Crabapple

Arbor walk #11, Treekeeper ID #1607

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.

Japanese Maple

Japanese Maple

Arbor Walk #136

The Japanese Maple has been cultivated in and around its native range for hundreds of years, and since the 1800s, has been symbolic of Japanese Gardens to Western observers.

Japanese Zelkova

Japanese Zelkova

Arbor walk #59, Treekeeper ID #5340

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.

Katsuratree

Katsuratree

Arbor Walk #106, Treekeeper ID #5947

The Katsuratree's native range in Japan and China. The 'Rotfuchs' cultivar is most commonly cultivated in the United States. In cultivation, it can grow to 60' tall and is noted for its beautiful shape and attractive foliage.

Kentucky Coffeetree

Kentucky Coffeetree

Arbor walk #7, Treekeeper ID #2253

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.

Kousa Dogwood

Kousa Dogwood

Arbor walk #41, Treekeeper ID #4568

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

Lacebark Elm

Lacebark Elm

Arbor walk #5, Treekeeper ID #3495

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.

Limber Pine

Limber Pine

Arbor walk #72, Treekeeper ID #3697

This under-used pine, native to the western United States, is more tolerant of alkaline soils than the Eastern white pine. The dark blue green needles help this tree stand out in the landscape.

Littleleaf Linden

Littleleaf Linden

Arbor walk #42, Treekeeper ID #4386

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.

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Loblolly Pine

Arbor Walk #126

The Loblolly Pine is an iconic tree in the Southeastern United States, dominating the southern pine forests and being grown for lumber in plantations in the region. It is tall, skinny in shape, and a vigorous grower.

London Planetree

London Planetree

Arbor walk #6, Treekeeper ID #2200

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.

Miyabe Maple

Miyabe Maple

Arbor walk #2, TreeKeeper ID #3153

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.

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Nannyberry Viburnum

Arbor Walk #133

The Nannyberry Viburnum features edible berries that persist in winter and abundant white flowers. It is a tall shrub or small tree, reaching about 15' in height as a multi-stemmed shrub, or pruned into one trunk up to 30'.

Nantucket Serviceberry

Nantucket Serviceberry

Arbor Walk #131

This shrub is quite rare, endemic to Maine, Massachusetts, and other isolated pockets along the East Coast from Nova Scotia to South Carolina. Its edible berries and pollen-tipped white flowers are notable characteristics of this plant, which inhabits sandy areas mainly along the coastline.

Northern Catalpa

Northern Catalpa

Arbor walk #10, TreeKeeper ID #1794

LEARNING THE TREES
Before you can learn the trees, you have to learn
The language of the trees. That’s done indoors,
Out of a book, which now you think of it
Is one of the transformations of a tree.
The words themselves are a delight to learn,
You might be in a foreign land of terms
Like samara, capsule, drupe, legume and pome,
Where bark is papery, plated, warty or smooth.
But best of all are the words that shape the leaves—
Orbicular, cordate, cleft and reniform—
And their venation—palmate and parallel—
And tips—acute, truncate, auriculate.
Sufficiently provided, you may now
Go forth to the forests and the shady streets
To see how the chaos of experience
Answers to catalogue and category.
Confusedly. The leaves of a single tree
May differ among themselves more than they do
From other species, so you have to find,
All blandly says the book, “an average leaf.”
Example, the catalpa in the book
Sprays out its leaves in whorls of three
Around the stem; the one in front of you
But rarely does, or somewhat, or almost;
Maybe it’s not catalpa? Dreadful doubt.
It may be weeks before you see an elm
Fanlike in form, a spruce that pyramids,
A sweetgum spiring up in steeple shape.
Still, pedetemtim as Lucretius says,
Little by little, you do start to learn;
And learn as well, maybe, what language does
And how it does it, cutting across the world
Not always at the joints, competing with
Experience while cooperating with
Experience, and keeping an obstinate
Intransigence, uncanny, of its own.
Think finally about the secret will
Pretending obedience to Nature, but
Invidiously distinguishing everywhere,
Dividing up the world to conquer it,
And think also how funny knowledge is:
You may succeed in learning many trees
And calling off their names as you go by,
But their comprehensive silence stays the same.