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The tree succumbed to Dutch elm disease and was felled in 1968. A ring count established that it had begun life in the year 1701. [61] The "Great Elm Tree" at Phillips Academy in Andover, Massachusetts is believed to have been standing for at least 200 years. It is being well cared for and receives regular treatments for Dutch elm disease.
The American elm is a deciduous tree which, under ideal conditions, can grow to heights of 21 to 35 meters (69 to 115 feet). [3] The trunk may have a diameter at breast height (dbh) of more than 1.2 m (4 ft), supporting a high, spreading umbrella-like canopy.
The tree's natural range in eastern England overlaps with that of wych elm (Ulmus glabra), the two species hybridizing to produce elms of the Ulmus × hollandica group. Nursery cultivars in this group with English U. minor subsp. minor in their parentage include 'Vegeta' , 'Cicestria' , and 'Smithii' .
Ulmus alata - winged elm, Wahoo; Ulmus crassifolia - cedar elm; Ulmus elongata - long raceme elm; Ulmus ismaelis; Ulmus mexicana - Mexican elm; Ulmus serotina - September elm; Ulmus thomasii - rock elm, cork elm; Subgenus Ulmus. U. section Foliaceae. Ulmus castaneifolia - chestnut-leafed elm, multi-nerved elm; Ulmus changii - Hangzhou elm Ulmus ...
American elm trees along the Mall and Literary Walk in New York City's Central Park (2013) The oldest American elm trees in New York City's Central Park were planted in the 1860s by Frederick Law Olmsted, making them among the oldest stands of American elms in the world. Along the Mall and Literary Walk four lines of American elms stretch over ...
The wood of the rock elm is the hardest and heaviest of all elms, and where forest-grown remains comparatively free of knots and other defects. It is also very strong and takes a high polish, and consequently was once in great demand in America and Europe for a wide range of uses, notably boatbuilding, furniture, agricultural tools, and musical instruments.
Ulmus alata, the winged elm or wahoo, is a small- to medium-sized deciduous tree endemic to the woodlands of the southeastern and south-central United States. The species is tolerant of a wide range of soils, and of ponding, but is the least shade-tolerant of the North American elms.
Identification keys are sometimes also referred to as artificial keys to differential them from other diagrams that visualize a classification schemes, often in the form of a key or tree structure. These diagrams are called natural keys or synopses and are not used for identifying specimens. In contrast, an artificial identification key is a ...