Thuja occidentalis IDed by multiple trunks (a relatively common feature); brownish-gray bark (young trees are more reddish-brown but this tree seems relatively old); scaly cypress-like leaves (Northern White Cedars are false-cedars); and small flower-like cones whose scales each have a small pointed tip. This website is helpful to ID this species.
Flowering Dogwood
Cornus florida IDed by bark and buds.
Young Flowering Dogwood
Cornus florida IDed by distinctly bulbous buds.
Great Laurel (?)
A rather sad Rhododendron maximum IDed by glossy, evergreen, oval leaves. The flower buds seem to match, but idk.
Hinoki Cypress (?)
Chamaecyparis obtusa IDed by scaly cypress-like leaves and bark.
Eastern Hemlock
Tsuga canadensis IDed by bark, pine cones, and its short needles whose stems are snug against the twig.
American Sycamore Dried Leaves
Leaf of a Plantanus occidentalis found at the base of a small hill. IDed by distinct plane-tree-esque shape. Though London plane trees have similar leaves, this is definitely a sycamore’s: the closest plane tree (i.e. the tree this leaf probably came from) is the one photographed below, and it has outer bark at the trunk and gleaning white inner bark near the crown — a sycamore for sure.
Privet (icid)
[Incomplete ID] May be Ligustrum ovalifolium based on leaves. Have yet to verify buds.
Norway Spruce
Picea abies IDed by the shape of the tree, overall appearance, and by the needles all around the twig. Also cones!
Hinoki cypress (??)
Chamaecyparis obtusa IDed by bark and scaly Cypress like foliage (hinoki is a false cypress). Returned in the day to get better photos.