Acer laevigatum

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Acer laevigatum
Acer laevigatum.jpg
Samaras and seeds of Acer laevigatum
Scientific classification
Kingdom: Plantae
(unranked): Angiosperms
(unranked): Eudicots
(unranked): Rosids
Order: Sapindales
Family: Sapindaceae[1]
Genus: Acer
Species: A. laevigatum
Binomial name
Acer laevigatum
Wall.

Acer laevigatum (Smooth Maple or Nepal Maple), is an atypical species of maple native to southern China (Guizhou, Hong Kong, Hubei, Shanxi, Sichuan, Xizang, Yunnan), northern India (Arunachal Pradesh, Sikkim), northern Myanmar, Nepal, and northern Vietnam. It grows at moderate altitudes of 1,000-2,000 m, with a wet monsoon climate.[2][3]

It is an evergreen tree growing to a height of 10–15 m or more, with a trunk up to 50 cm diameter. The leaves are smooth, unlobed, leathery, olive-green, and about 6–15 cm long and 3–5 cm wide, with a short 1-1.5 cm petiole. The leaves are normally persistent, and only drop in winter in unusually severe frost.[3]

The samaras are 4–7 cm long and have a purplish tone.

There are two varieties, which may not be fully distinct:[2]

  • Acer laevigatum var. laevigatum (syn. A. hainanense Chun & W.P.Fang). Most of the species' range. Leaves glabrous (hairless).
  • Acer laevigatum var. salweenense (W.W.Smith) J.M.Cowan ex W.P.Fang (syn. A. salweenense W.W.Smith). Yunnan. Leaves pubescent (downy).

Cultivation[edit]

This tree is only rarely seen in maple collections as it is too tender for many locations, with successful cultivation north to Ireland in Europe, and southwest British Columbia in North America.[3][4][5] One in Cornwall is 17 m tall (Tree Register of the British Isles).

References[edit]

  1. ^ Stevens, P. F. (2001 onwards). Angiosperm Phylogeny Website. Version 9, June 2008 [and more or less continuously updated since]. http://www.mobot.org/MOBOT/research/APweb/.
  2. ^ a b Xu, T.-z., Chen, Y., de Jong, P. C., & Oterdoom, H. J. Flora of China: Aceraceae (draft)
  3. ^ a b c van Gelderen, C.J. & van Gelderen, D.M. (1999). Maples for Gardens: A Color Encyclopedia.
  4. ^ Bean, W. J. (1970). Trees and Shrubs Hardy in the British Isles, 8th ed.
  5. ^ Rushforth, K. D. (1999). Trees of Britain and Europe. ISBN 0-00-220013-9.