Trees on the Yale Nature Walk

Sour gum or black

Nyssa sylvatica
Tree ID: 152
Prospect and Sachem
Date of tree entry: February 8, 2023

Appalachian Tea
Ilex gaba
Tree ID: 156
Prospect and Sachem
Date of tree entry: February 8, 2023

Eastern White Pine
Pinus strobus
Tree ID: 151
Date of tree entry: February 7, 2023

Eastern White Pine
Pinus strobus
Tree ID: 151
Date of tree entry: February 7, 2023

Eastern White Oak
Quercus alba
Tree ID: 150
Date of tree entry: February 7, 2023
The Quercus alba tree (also known as Eastern White Oak) has a spreading tree shape.

Sugar Maple
Acer saccharum
Tree ID: 140
Date of tree entry: February 23, 2022
Acer saccharum, the Sugar Maple tree is native to the hardwood forests of Eastern Canada and the Northern United States, best known for being the primary source of maple syrup and for its brightly colored fall foliage. Sugar Maples are deciduous tress which normally reach heights of 25-35 m and can even grow up to 45 m. They have deciduous palmate leaves whose color changes year round between green, yellow, orange, red, brown, and colors in between. Their fruit are pairs of samaras, which are colloquially known as "twirly birds" because as they fall from the tree, the twirl around until they reach the ground. Fun Fact: One of the students whose tree this is used to have a sugar maple in her front yard as she is from Wisconsin. The sugar maple is actually the state tree of Wisconsin (in addition to New York, Vermont, and West Virginia).
Black Chokeberry in the Winter

Black Chokeberry
Aronia melanocarpa
Tree ID: 137
Prospect and Sachem
Date of tree entry: February 16, 2022
The black chokeberry is a species of shrub that is characterized by its black berries and glossy green leaves. During the spring, the shrub begins to grow white-colored flowers and at the beginning of autumn, it begins to grow clumps of black-colored berries. However, during the winter months, the shrub sheds its leaves and only leaves behind the berries, which can begin to whither due to the cold environment. These berries are edible and serve as a food source for local animals, such as birds.

China rose
Rosa chinensis
Tree ID: 146
Prospect and Sachem
Date of tree entry: February 17, 2022
Waist-high rose bush situated next to Benjamin Franklin College bike path, and across from Yale Health and Grove St Cemetery. In spring, the plant has red flowers and light green leaves; its branches are mottled crimson and brown and are visible in the winter, when the shrub lacks leaves and flowers. Rosa Chinensis is native to south-west China and can grow up to 1 to 2m tall with single, semi-double or double flowers with red, white, pink or purple petals–it can grow in hedges or form thickets. China roses were cultivated in their native lands before the Europeans discovered them. Their floral scent is one of the ways that they lure insects to pollinate and who receive pollen or nectar as a reward–their scent is a particularly important pollinating syndrome when there are poor visual cues for pollinators.

River Birch
Betula nigra
Tree ID: 147
Prospect and Sachem
Date of tree entry: February 17, 2022
The tree is very large with two bifurcations, causing it to have three main trunks. The branches were of the alternating pattern, and seed pods were observed on the ends of the branches. The bark was scaly.

River Birch
Betula nigra
Tree ID: 147
Prospect and Sachem
Date of tree entry: February 17, 2022
The most important thing about river birches is that they were declared by Prince Maximilian, Emperor of Mexico, to be the most beautiful of American trees -- a sentiment we definitely agree with. Some other things to know about river birches is that they are deciduous, upright, flowering trees with exfoliated, light brown bark. In the fall, the leaves turn yellow and quickly drop off the tree. This type of birch is the only native birch that thrives in low elevations in the south. In general, river birches grow in wet sites with moist, acidic, sandy, rocky, or well-drained loam (meaning there are equal proportions of sand, silt, and clay. The specific tree we studied is very large with two bifurcations, causing it to have three main trunks. The branches were of the alternating pattern, and seed pods were observed on the ends of the branches. The bark was scaly.

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