Trees on the Yale Nature Walk

This ginkgo tree is located in the backyard of President Peter Salovey's house, between Hillhouse and Whitney Avenue. A living fossil, Ginkgo biloba has been found in fossils from as far back as 270 million years ago. The species originated in China and has a history of being used for medicinal purposes. Ginkgo trees are prized in Asia because of their importance in Buddhism and can be found in palace and temple gardens. They are a hearty species and survive well in cities so can also be found in devleoped areas from New York City to Tokyo. Before its foliage has been lost, the tree can be easily recognized by its unique fan-shaped leaves. The foliage turns from green to a golden-yellow color in the fall. Male trees are preferred because female trees produce fruit that emits a foul odor.

Liquidambar styraciflua is known as the American sweetgum. It is a deciduous tree that can be found in southeastern U.S., as well as southern Mexico and Central America. The sweetgum is a fast-growing tree that develops a significant taproot that tolerate high moisture levels in soil. It is used for its lumber, and is one of the most common sources of hardwood and plywood, but also produces spectacular colors as it drops its leaves in the fall. The sweetgum is a monoecious species and is pollinated primarily by wind. The sweetgum produces a resin that can harden and be used for chewing gum as well as medicinal purposes. Some other fun facts about the American sweetgum include that it provides protection and food for many forest animals, including squirrels, deer, doves, and chipmunks. It can be especially resistant to attack by insects, which makes them very helpful trees in reforestation projects and reclamations of former mineral mines. Finally, sweetgum trees can fix nitrogen and promote soil health. Our American sweetgum is situated in a beautiful green area between OML and Kroon Hall. It offers a calming presence in the heart of the science buildings at Yale, and is surely a special tree to observe, especially in the autumn.

Located in the middle of the Grove Street Cemetery, this tree is a great addition to any landscape. Commonly known as the small-leaved lime or littleleaf linden, this species is not related to the lime fruit. Tilia cordata is in a family of large deciduous trees that populate the northern hemisphere, although this tree is still quite young and therefore small. Tilia is a Greek cognate for “elm tree” or “black poplar” which descends from the root “ptelea” for broad, likely indicating the leaves.

This weeping Higan cherry stands in Grove Street Cemetery. In mid-April it is a waterfall of pink blossoms when the surrounding trees remain bare. The common name of this tree derives from Ohigan, a Buddhist holiday celebrated in its native Japan on the autumnal and spring equinoxes. This particular weeping Higan cherry is 7.3m tall, although the species can grow to over 12m at maturity. Weeping Higan cherries can be remarkably long-lived: one famous tree in Japan is over 1,000 years old. Although the trees themselves may live centuries, the flowers linger only for a short time and consequently the cherry blossoms have long symbolized not only spring, but also the transience of all things.