it can be found in swamps, bottomland forests, moist slopes, and in areas with especially nutrient-rich soils. The American Elm cultivar Ulmus americana 'Jefferson' was cloned from a tree that grows along the National Mall in Washington D. However, scientists from the National Arboretum have determined the ‘Jefferson’ elm on the National Mall is a true varietal of the species instead of a hybrid. The serrated pointy leaves turn an outstanding yellow in the fall. It is native to eastern and central North America. More tidy than some of the other improved American Elm selections, this tree is not as awkward in it’s youth as some other varieties. This mature tree is instantly recognizable, with a broad vase-shaped canopy, sturdy trunk and … New Harmony (Ulmus americana 'New Harmony'): Excellent resistance to Dutch elm disease; vase-shaped habit. Jefferson was developed at the US Arboretum in Washington, DC. This is a cultivar of the American elm. Landscape Attributes. Ulmus americana, commonly called American elm, is a medium to large deciduous tree, typically growing to 60-80’ (less frequently to 130’) tall with a vase-shaped, broad-rounded crown.It is native to eastern and central North America. Neither the flowers nor the fruit are ornamentally significant. This is a cultivar of the American elm. Neither the flowers nor the fruit are ornamentally significant. Handsome Jefferson American Elm (Ulmus americana 'Jefferson') was cloned from an impervious specimen found standing proudly on the Washington Mall. The serrated pointy leaves turn an outstanding yellow in the fall. Soil Moisture Well-drained Average to Dry Soils Moist to Average. Ulmus americana, commonly called American elm, is a medium to large deciduous tree, typically growing to 60-80’ (less frequently to 130’) tall with a vase-shaped, broad-rounded crown. Jefferson (Ulmus americana 'Jefferson'): Excellent resistance to Dutch elm disease; vase-shaped habit; considered sterile. Phonetic Spelling ULM-us a-mer-ih-KAY-nah Description. Noteworthy Characteristics. In nature. Attributes Fall Color. Ulmus americana 'Jefferson' Characteristics. Full Sun. It will serve your family just as faithfully. The ‘Jefferson’ elm was previously thought to be a hybrid of the Ulmus americana and another species. Jefferson Elm is a dense deciduous tree with a more or less rounded form. It has a vase shape similar to a Zelkova. Ulmus americana, or American Elm, is a deciduous tree, native to North Carolina, that can grow to 80 to 100 feet tall with a trunk diameter of 2 to 5 feet.Older trees sometimes develop buttresses that expand their base. Jefferson American Elm is a dense deciduous tree with a more or less rounded form. Ulmus americana, generally known as the American elm or, less commonly, as the white elm or water elm, is a species of elm native to eastern North America, naturally occurring from Nova Scotia west to Alberta and Montana, and south to Florida and central Texas.The American elm is an extremely hardy tree that can withstand winter temperatures as low as −42 °C (−44 °F). In Missouri, it typically occurs in low moist ground and along streams throughout the state (Steyermark). Browse pictures and read growth / cultivation information about Jefferson Elm has dark green foliage throughout the season. Heat Tolerant. Foliage Color Green (dark) Landscape uses Specimen. Landscape Attributes. Planted in the 1930s, the original specimen had survived DED. Botanical Name: Ulmus americana 'Jefferson' Numbers (NA 62001; PI 635109; NPS 3-487) Family Ulmaceae Hardiness: USDA Zones 4-7 Development: 'Jefferson' was originally selected by … Add to cart. U.S. National Arboretum Plant Introduction Floral and Nursery Plants Research Unit Visit us on the web: www.usna.usda.gov December 2010 The U.S. Department of Agriculture is an Equal Opportunity Employer. Description Additional information Description. Fast. Drought Tolerant. Habit Vase-shape Upright. Jefferson American Elm has dark green foliage throughout the season. Ulmus americana ‘Jefferson’ Jefferson American Elm. Ulmus americana 'Jefferson' quantity. Partial Sun/Shade. To a Zelkova Well-drained Average to Dry soils moist to Average handsome jefferson Elm. Standing proudly on the Washington Mall, DC in low moist ground and along streams throughout state! Found standing proudly on the Washington Mall it has a vase shape to. Average to Dry soils moist to Average about Ulmus americana ‘Jefferson’ jefferson American Elm is dense. An outstanding yellow in the fall cultivation information about Ulmus americana 'Jefferson ' ): Excellent resistance to Elm! 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