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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 was steadily weakened by viruses in Europe and had all but disappeared by the 1940s. However, the disease had a much greater and longer-lasting impact in North America, owing to the greater susceptibility of the American elm, Ulmus americana, which masked the emergence of the second, far more virulent strain of the disease Ophiostoma novo-ulmi.
The Ulmaceae (/ ʌ l ˈ m eɪ s i /) are a family of flowering plants that includes the elms (genus Ulmus), and the zelkovas (genus Zelkova). [3] Members of the family are widely distributed throughout the north temperate zone, and have a scattered distribution elsewhere except for Australasia.
Ulmus pseudo-americana Lesquereux; Ulmus pseudolongifolia Oishi & Huz; Ulmus pyramidalis Goeppert; Ulmus pseudopyramidalis Kvaček & Hably; Ulmus rhamnifolia Ward; Ulmus speciosa Newberry (syn= Ulmus tanneri Chaney) Ulmus stuchlikii Kohlman-Adamska, Ziembińska-Tworzydło, & Zastawniak; Ulmus subparvifolia Nathorst; Ulmus tenuiservis Lesquereux ...
Immediately south of the Utah County Administration Building and just east of the Historic Utah County Courthouse in downtown Provo resides possibly a one-of-a-kind elm tree. Officially it is a specimen of Ulmus americana, but is unusual because it grows sideways, making it a "tabletop" elm tree. The tree was planted in 1927, and currently its ...
Few flowering plants self-pollinate; some can provide their own pollen (self fertile), but require a pollinator to move the pollen; others are dependent on cross pollination from a genetically different source of viable pollen, through the activity of pollinators. One of the possible pollinators to assist in cross-pollination are honeybees.
Ulmus americana L. var. rubra Aiton. Accepted Name: Ulmus rubra Muhl. Ulmus americana f. alba (Aiton) Fern. Accepted Name: Ulmus americana L. Ulmus americana f. ascendens Slavin. Accepted Name: Ulmus americana L. Ulmus americana f. columnaris Rehder. Accepted Name: Ulmus americana L. Ulmus americana f. intercedens Fern. Accepted Name: Ulmus ...
Weeping elm by Plymouth Congregational Church, Plainfield, Illinois (1941) Morton Arboretum's Ulmus americana f. pendula (2009). The U. americana pendula planted at the Dominion Arboretum, Ottawa, in 1889 may have been Späth's mis-named Ulmus fulva (Mchx) pendula, later corrected in arboretum lists, since Späth supplied many of the 1880s' and 1890s' elms there. [14]