Arbor Walk #62, Treekeeper ID #4666
The American Arborvitae is most prevalent in eastern and central Canada, and found in Northern Illinois, Ohio, and New York as well as scattered populations further south. St. Louis is near the southern end of the tree's range, and it benefits from being in a slightly shadier location than they would prefer in their northern ranges.
Arbor Walk #17, Treekeeper ID #1937
This is one of the oldest and largest trees on campus. It has large green leaves and small, sweetly scented flowers. Recently, efforts have been taken to preserve and continue on the genetic lineage of this tree whose history follows that of WashU's Danforth Campus.
Arbor Walk #60, Treekeeper ID #5449
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.
Arbor walk #108, Treekeeper ID #1757
This tree is in the Fragaceae family and is native to Missouri. It is a deciduous tree with broad and rounded crown, which is good for shading. The leaves are leathery, dark green and turn to yellow-brown in fall. The oval acorns is large in size with fringed burry cups.
Arbor Walk #146
Although this tree has a broad range within the Upper Midwest and Northeast United States, it is uncommon in most of its range, being overshadowed by its ubiquitous relative Juglans nigra, the black walnut. Its lack of prominence is mainly caused by the deadly butternut canker, which only affects J. cinerea.
Arbor walk #71, TreeKeeper ID #3472
Cherrybark Oak is a medium to large-sized deciduous tree native to the Southern US including the southeast corner of Missouri. The Cherrybark Oak looks very similar to another Missouri native, Southern Red Oak. So much so, that this tree was mislabeled as a Southern Red Oak for many years in the Arboretum.
Arbor walk #64, Treekeeper ID #5490
Despite being widely planted as an easy-to-grow shade tree for streets and landscapes throughout the Midwest, the Common Horse Chestnut is originally native to the Balkan region of Europe. The tree features showy white flowers in spring which in summer transition into fruit, consisting of one or two seeds encased in a spiny husk.
Arbor Walk #128
The Compton Hybrid Oak is a natural hybrid between the Southern Live Oak and the Overcup Oak and can be found in the areas with overlapping distributions of the two parent species.
Arbor walk #73, Treekeeper ID #2196
The Dawn Redwood is considered a living fossil because it was only known due to the fossil remains from individuals that lived with the dinosaurs. It was not until the 1940's that a small population was discovered in a remote valley of the Szechwan province of China.