Acer campestre

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File:237 Acer campestre.jpg

Acer campestre, known as the field maple,[1] is a flowering plant species in the family Sapindaceae. It is native to much of continental Europe, Britain, southwest Asia from Turkey to the Caucasus, and north Africa in the Atlas Mountains. It has been widely planted, and is introduced outside its native range in Europe and areas of USA and Western Australia with suitable climate.

Description

It is a deciduous tree reaching Template:Convert tall, with a trunk up to Template:Convert in diameter, with finely fissured, often somewhat corky bark. The shoots are brown, with dark brown winter buds. The leaves are in opposite pairs, Template:Convert long (including the Template:Convert petiole) and Template:Convert broad, with five blunt, rounded lobes with a smooth margin. Usually monoecious, the flowers are produced in spring at the same time as the leaves open, yellow-green, in erect clusters Template:Convert across, and are insect-pollinated. The fruit is a samara with two winged achenes aligned at 180°, each achene is Template:Convert wide, flat, with a Template:Convert wing.[2][3]

The two varieties, not accepted as distinct by all authorities, are:[2][4]

  • Acer campestre var. campestre - downy fruit
  • Acer campestre var. leiocarpum (Opiz) Wallr. (syn. A. campestre subsp. leiocarpum) - hairless fruit

The closely related Acer miyabei replaces it in eastern Asia.[2]

Distribution

The native range of field maple includes much of Europe, including Denmark, Poland and Belarus, England north to southern Scotland (where it is the only native maple), southwest Asia from Turkey to the Caucasus, and north Africa in the Atlas Mountains.[2][3][4][5][6][7][8] In many areas, the original native range is obscured by widespread planting and introductions.[9] In North America it is known as hedge maple[10][11] and in Australia, it is sometimes called common maple.[12] In Nottinghamshire, England it was known locally as dog oak.[13]

Ecology

Field maple is an intermediate species in the ecological succession of disturbed areas; it typically is not among the first trees to colonise a freshly disturbed area, but instead seeds in under the existing vegetation. It is very shade-tolerant during the initial stages of its life, but it has higher light requirements during its seed-bearing years. It exhibits rapid growth initially, but is eventually overtaken and replaced by other trees as the forest matures. It is most commonly found on neutral to alkaline soils, but more rarely on acidic soil.[8]

Diseases include a leaf spot fungus Didymosporina aceris, a mildew Uncinula bicornis, a canker Nectria galligena, and verticillium wilt Verticillium alboatrum. The leaves are also sometimes damaged by gall mites in the genus Aceria, and the aphid Periphyllus villosus.[14]

Cultivation

The field maple is widely grown as an ornamental tree in parks and large gardens. The wood is white, hard and strong, and used for furniture, flooring, wood turning and musical instruments,[15] though the small size of the tree and its relatively slow growth make it an unimportant wood.[2] It has an OPALS rating of 7.[16]

It is locally naturalised in parts of the United States[10] and more rarely in New Zealand.[17] The hybrid maple Acer × zoeschense has A. campestre as one of its parents.[3]

The tree has gained the Royal Horticultural Society's Award of Garden Merit.[18][19]

Cultivars

Over 30 cultivars of Acer campestre are known, selected for their foliage or habit, or both; several have been lost to cultivation.[20] Template:Div col

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Bonsai

Acer campestre (and the similar A. monspessulanum) are popular among bonsai enthusiasts. The dwarf cultivar 'Microphyllum' is especially useful in this regard. A. campestre bonsai have an appearance distinct from those selected from some other maples such as A. palmatum with more frilly, translucent, leaves. The shrubby habit and smallish leaves of A. campestre respond well to techniques encouraging ramification and leaf reduction.[21][22]

Gallery

References

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Further reading

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  1. ↑ Template:BSBI 2007
  2. ↑ a b c d e Rushforth, K. (1999). Trees of Britain and Europe. Collins Template:ISBN.
  3. ↑ a b c Mitchell, A. F. (1974). A Field Guide to the Trees of Britain and Northern Europe. Collins Template:ISBN
  4. ↑ a b Euro+Med Plantbase Project: Acer campestre Template:Webarchive
  5. ↑ Script error: No such module "citation/CS1".
  6. ↑ Flora of NW Europe: Acer campestreTemplate:Dead link
  7. ↑ Den virtuella floran: Acer campestre distribution map
  8. ↑ a b Script error: No such module "Citation/CS1".
  9. ↑ Script error: No such module "citation/CS1".
  10. ↑ a b Script error: No such module "citation/CS1".
  11. ↑ Script error: No such module "citation/CS1".
  12. ↑ Department of Agriculture, Western Australia: Pests and Diseases Image Library Template:Webarchive
  13. ↑ Script error: No such module "citation/CS1".
  14. ↑ Script error: No such module "citation/CS1".
  15. ↑ Script error: No such module "citation/CS1".
  16. ↑ Script error: No such module "citation/CS1".
  17. ↑ Trans. and Proc. Roy. Soc. New Zealand 36: 203-225 Plants naturalised in the County of Ashburton
  18. ↑ Script error: No such module "citation/CS1".
  19. ↑ Script error: No such module "citation/CS1".
  20. ↑ Script error: No such module "citation/CS1".
  21. ↑ Script error: No such module "citation/CS1".
  22. ↑ Script error: No such module "citation/CS1".
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