Elm Tree Pictures
Elm Tree Gallery Welcome! In the Elm category you will find nice pictures of elm trees.
You will also find a lot of wonderful facts on elm trees, including information about the elm tree species, planting information, and much more.
This is valuable and useful information that can help you to learn more about the elm tree.
Elm Tree Images
View each elm tree picture in full size just click on the tree photo you like. Enjoy these pictures of elm trees.
Elm Trees: Elm Photo Gallery
Elm Tree Types: List of Different Types of Elm Tree
There are over 30 species of Elms, below is listed the more common varieties.
- American Elm Tree
- Camperdown Elm Tree
- Cedar Elm Tree
- Cherry-Bark Elm Tree
- Chinese Elm Tree
- David Elm Tree
- English Elm Tree
- European White Elm Tree
- Field Elm Tree
- Grey Elm Tree
- Himalayan Elm Tree
- Large Fruited Elm Tree
- Manchurian Elm Tree
- Mexican Elm Tree
- Rock Elm Tree
- September Elm Tree
- Siberian Elm Tree
- Slippery Elm Tree
- Winged Elm Tree
- Wych Elm Tree
Elm Tree, Detailed Facts & Information on Elm Trees
Here is some general information on the elm tree.
Elms are deciduous and semi-deciduous trees comprising the genus Ulmus, family Ulmaceae. Elms first appeared in the Miocene period about 40 million years ago. Originating in what is now central Asia, the tree flourished and established itself over most of the Northern Hemisphere, traversing the Equator in Indonesia. During the 19th and early 20th centuries, many species and cultivars were planted as ornamentals in Europe, North America, and parts of the Southern Hemisphere, notably Australasia.
Elm leaves are alternate, with simple, single- or, most commonly, doubly serrate margins, usually asymmetric at the base and acuminate at the apex. The genus is hermaphroditic, having apetalous perfect flowers which are mostly wind-pollinated, although bees do visit them. The fruit is a round wind-dispersed samara flushed with chlorophyll, facilitating photosynthesis before the leaves emerge. All species are tolerant of a wide range of soils and pH levels but, with few exceptions, demand good drainage.
There are approximately 30 to 40 species of elm; the ambiguity in number is a result of difficulty in delineating species, owing to the ease of hybridization between them and the development of local seed-sterile vegetatively propagated microspecies in some areas, mainly in the field elm group. Rackham describes Ulmus as the most difficult critical genus in the entire British flora, adding that 'species and varieties are a distinction in the human mind rather than a measured degree of genetic variation'. Eight species are endemic to North America, and a smaller number to Europe; the greatest diversity is found in China.
Elm wood was valued for its interlocking grain, and consequent resistance to splitting, with significant uses in wagon wheel hubs, chair seats and coffins. The often long, straight, trunks were favoured as a source of timber for keels in ship construction.
The wood is also resistant to decay when permanently wet, and hollowed trunks were widely used as water pipes during the medieval period in Europe. Elm was also used as piers in the construction of the original London Bridge. However this resistance to decay in water does not extend to ground contact.
Elms also have a long history of cultivation for fodder, with the leafy branches cut for livestock. The practice continues today in the Himalaya, where it contributes to serious deforestation.
Elm bark, cut into strips and boiled, sustained much of the rural population of Norway during the great famine of 1812. The seeds are particularly nutritious, comprising 45% crude protein, and less then 7 percent fibre by dry mass.
From the 18th century to the early 20th century, elms were among the most widely planted ornamental trees in both Europe and North America. They were particularly popular as a street tree in avenue plantings in towns and cities, creating high-tunnelled effects. Their tolerance of air-pollution and the comparatively rapid decomposition of their leaf-litter in the fall were further advantages. In North America the species most commonly planted was the American Elm Ulmus americana, which had unique properties that made it ideal for such use: rapid growth, adaptation to a broad range of climates and soils, strong wood, resistance to wind damage, and vase-like growth habit requiring minimal pruning.
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