Blue spruce is a medium to large tree with pyramidal form. Branches appear layered, especially with age.
Black locust may develop a straight stem with a very small crown or it may form thickets by root suckering.
Pitch pine form is extremely variable; short and poorly formed on poor sites, but can be a straight, medium-sized tree on better sites.
In a stand tulip-poplar is very straight and can be impressively large with a limb-free bowl. Open grown trees become oval in shape.
Sycamore is a very massive tree with heavy, spreading branches with obviously zigzag twigs. Tops are often white due to peeling bark.
American elm is a beautifully spreading tree that once provided shade to many city streets across the eastern U.S.