Ulmus americana 'Princeton' - Princeton American ElmCommonly known as American elm, is a medium to large deciduous tree. It typically grows to heights of 60 80 feet, with a vase shaped, broad rounded crown. In spring, small green flowers appear before the emergence of foliage, which are followed by wafer like samaras containing single seeds surrounded by flattened oval rounded papery wings. The rough textured dark green leaves have toothed margins and asymmetrical bases, but their fall color is