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Although intensive feeding by elm bark beetles can kill weakened trees, [15] their main impact is as vectors of DED. American elm is also moderately preferred for feeding and reproduction by the adult elm leaf beetle Xanthogaleruca luteola [16] and highly preferred for feeding by the Japanese beetle Popillia japonica [17] in the United States.
Rows of American elm trees line a path south of the Lincoln Memorial Reflecting Pool on the National Mall in Washington, DC (November 11, 2006) Several rows of American elm trees that the National Park Service (NPS) first planted during the 1930s line much of the 1.9-mile-length (3 km) of the National Mall in Washington, DC. DED first appeared ...
The tree was by far the most common elm in the north and west of the British Isles and is now acknowledged as the only indisputably British native elm species. Owing to its former abundance in Scotland, the tree is occasionally known as the Scotch or Scots elm; Loch Lomond is said to be a corruption of the Gaelic Lac Leaman interpreted by some ...
Ulmus rubra is a medium-sized deciduous tree with a spreading head of branches, [4] commonly growing to 12–19 metres (39–62 feet), very occasionally over 30 m (98 ft) in height.
American elm is a vase-shaped, medium to large, deciduous tree. [4] The tree can grow to greater than 30 m in height, and is distinguished by its dense, symmetrical, upright form and dark green foliage, ultimately forming a broad umbrella crown. Crotch angles can be acute, with considerable bark inclusion which can later lead to branch breakages.
Ulmus villosa, the cherry-bark elm or Marn elm, is one of the more distinctive Asiatic elms, and a species capable of remarkable longevity.It is endemic to the valleys of the Kashmir at altitudes of 1,200–2,500 metres (3,900–8,200 feet) but has become increasingly rare owing to its popularity as cattle fodder.
The tree typically grows to < 30 m (98 ft) and bears a rounded crown. [14] The bark of the trunk is rough, furrowed lightly in older trees to form a block pattern. Young branchlets occasionally have corky wings. The shoots are slender compared with those of wych elm.
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 ...
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