Ulmus americana ‘Princeton’ Princeton American Elm (ul -muss ah-mer-i-can -uh)
ZONES: LEAF COLOR: Dark green in summer and firm (leathery); yellowish to yellow in fall. 3, 4, 5, 6, 7, 8, 9 LEAF DESCRIPTION: SIMPLE, 3 to 6 long and half as wide, broadly oval to el- HEIGHT: litic shape, acute to acuminate tip, base rounded but usually oblique (uneven), 60 to 80 margins doubly serrate. ALTERNATE arrangement. WIDTH: FLOWER DESCRIPTION: Greenish, tiny, appearing in multi-flower clusters on 40 to 60 previous season’s growth, flowers having both stamens and pistils (perfect). Flow- ers in early spring. NOT SHOWY and NOT ORNAMENTAL. FRUIT: Small single-seeded, circular EXPOSURE/CULTURE: Full sun to part shade. Will grow in a wide range of soil samara, hairy, notched on end. textures, pH levels, and soil moisture levels. Matures in spring. PEST PROBLEMS: Phloem necrosis possibly, but reported resistant to Dutch Elm TEXTURE: Disease and elm leaf beetles. Fine to medium. BARK/STEMS: Young stems reddish-brown and smooth; older bark is dark gray GROWTH RATE: with irregular intersecting ridges that are sometimes scaly. Rapid RELATED CULTIVARS: ‘Ascendens’ - An upright form that is much taller than HABIT: broad. ‘Valley Forge’ - Plant habit is similar to U. americana and is one of the most Oval and upright in youth, disease-resistant cultivars. becoming rounded and broad LANDSCAPE NOTES: Princeton American Elm is a very handsome plant that with age. is easy to grow with good form and attractive foliage. It can be used any place in FAMILY: the garden having ample space for a large tree. Be sure to select a cultivar with Ulmaceae a high level of resistance to Elm diseases, and design some other species into the landscape.