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Description. 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. Its heartwood is reddish-brown. The broad oblong to obovate leaves are 10–20 centimetres (4–8 inches) long, rough above but velvety below, with ...
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.
The original Camperdown Elm, replanted near the location of its discovery c.1840 in Camperdown Park, Dundee; image taken in 1989. The Wych Elm cultivar Ulmus glabra 'Camperdownii', commonly known as the Camperdown Elm, was discovered about 1835–1840 (often mis-stated as '1640') as a young contorted elm (a sport) growing in the forest at Camperdown House, in Dundee, Scotland, by the Earl of ...
EPPO Code. ERWICA. Slime flux, also known as bacterial slime or bacterial wetwood, is a bacterial disease of certain trees, primarily elm, cottonwood, poplar, boxelder, ash, aspen, fruitless mulberry and oak. A wound to the bark, caused by pruning, insects, poor branch angles or natural cracks and splits, causes sap to ooze from the wound.
A small to medium deciduous or semideciduous (rarely semi evergreen) tree, it grows to 10–18 m (33–59 ft) tall and 15–20 m (49–66 ft) wide with a slender trunk and crown. The leathery, lustrous green, single-toothed leaves are small, 2–5 cm long by 1–3 cm broad, [7] and often retained as late as December or even January in Europe ...
The cedar elm is a medium to large deciduous tree growing to 24–27 m tall with a rounded crown. The leaves are small, 2.5–5 cm long by 1.3–2 cm broad, with an oblique base, and distinguish it from Ulmus serotina with which it readily hybridizes in the wild.
The bark is grey-brown and deeply furrowed into scaly, flattened ridges. Many older branches have 3–4 irregular thick corky wings. It is for this reason the rock elm is sometimes called the cork elm. [8] The leaves are 5–10 cm (2–4 in) long and 2–5 cm (3 ⁄ 4 –2 in) wide, oval to obovate with a round, symmetrical base and acuminate ...
Ulmus pumila, the Siberian elm, is a tree native to Asia.It is also known as the Asiatic elm and dwarf elm, but sometimes miscalled the 'Chinese elm' (Ulmus parvifolia). U. pumila has been widely cultivated throughout Asia, North America, Argentina, and southern Europe, becoming naturalized in many places, notably across much of the United States.