American elm (Ulmus americana), also known as white elm, water elm, soft elm, or Florida elm, is most notable for its susceptibility to the wilt fungus, Ceratocystis ulmi. Commonly called Dutch elm disease, this wilt has had a tragic impact on American elms.

Ulmus americana, generally known as the American elm or, less commonly, as the white elm or water elm, [a] is a species of elm native to eastern North America. The trees can live for several hundred years. It is a very hardy species that can withstand low winter temperatures, but it is affected by Dutch elm disease.

2020年11月19日 · The American elm is a small to medium-sized (to very large) tree, at maturity with spreading branches forming a broad-spreading, fan-shaped crown. The twigs are slender, reddish-brown turning as gray with age, hairy at first and smooth later.

Common Name: American elm Scientific Name: Family: Ulmaceae Genus: Ulmus Species: U. americana Hardiness Zone: 3 to 9 Height: 60 to 100 ft Width: 30 to 60 ft Common Characteristics: The American elm was widely planted throughout the United States and in the 1960s came under attack from Dutch Elm Disease (DED). Millions of these trees were lost ...

Individual flowers are about 1/8" across, consisting of a short calyx with 7-9 lobes, an ovary with a divided style, and 7-9 stamens. The calyx is typically reddish green, while the anthers are red (but becoming dark-colored with age).

2025年2月7日 · The American Elm (Ulmus americana) is a majestic and fast-growing deciduous tree native to North America. With its iconic vase-like shape and towering presence, this tree once dominated urban and suburban landscapes.

Newer selections of Ulmus americana show good to excellent resistance to Dutch elm disease and are recommended for planting. These include the following: 'Jefferson', 'New Harmony', Prairie Expedition®, 'Princeton' , and 'Valley Forge'. Many hybrid elms are also resistant to …

The American Elm is a deciduous dicot angiosperm with alternating, simple leaves. The leaves are elliptical with a doubly-serrate margin, a rounded base, and an acuminate apex. The elm is prototypical of "pinnate venation," in which the veins originate from along the length of a central vein called the midrib that extends from the petiole to ...

Ulmus americana, generally known as the American elm or, less commonly, as the white elm or water elm, is a species native to eastern North America, naturally occurring from Nova Scotia west to Alberta and Montana, and south to Florida and central Texas.

American elm (Ulmus americana), also known as white elm, water elm, soft elm, or Florida elm, is most notable for its susceptibility to the wilt fungus, Ceratocystis ulmi. Commonly called Dutch elm disease, this wilt has had a tragic impact on American elms.