Acer griseum
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2008-03-08T20:15:53Z
Eubot
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Removed taxobox colour. See [[User:Eubot/Removing colours from taxoboxen]].
{{Taxobox
| name = ''Acer griseum''
| image = Acer griseum Morton 836-58-7.jpg
| image_width = 240px
| image_caption = '''''Acer griseum''''' at the [[Morton Arboretum]]<br>Accession 836-58-7
| regnum = [[Plant]]ae
| divisio = [[Flowering plant|Magnoliophyta]]
| classis = [[Dicotyledon|Magnoliopsida]]
| ordo = [[Sapindales]]
| familia = [[Sapindaceae]]
| genus = ''[[Maple|Acer]]''
| species = '''''A. griseum'''''
| binomial = ''Acer griseum''
| binomial_authority = ([[Adrien René Franchet|Franch.]]) [[Ferdinand Albin Pax|Pax]]
}}
{{commons|Acer griseum}}
'''''Acer griseum''''' ('''Paperbark Maple'''; {{zh-stp|s=血皮枫|t=血皮楓|p=xuè pí fēng}}) is a species of [[maple]] native to central [[China]], in the provinces of [[Gansu]], [[Henan]], [[Hubei]], [[Hunan]], [[Shaanxi]], [[Shanxi]], and [[Sichuan]], at altitudes of 1,500–2,000 m.<ref name=focd>Flora of China (draft): [http://web.archive.org/web/20060209210809/http://hua.huh.harvard.edu/china/mss/volume11/Aceraceae-AGH_coauthoring.htm ''Acer griseum'']</ref>
It is a small to medium-sized [[deciduous]] [[tree]], reaching 10-20 m tall with a trunk up to 70 cm diameter. The [[bark]] is smooth, shiny orange-red, peeling in thin, papery layers; it may become fissured in old trees. The shoots are densely downy at first, this wearing off by the second or third year and the bark exfoliating by the third or fourth year. The [[leaf|leaves]] are compound, with a 2–4 cm petiole with three [[leaflet]]s, each 3-10 cm long and 2-6 cm broad, dark green above, bright glaucous blue-green beneath, with several blunt teeth on the margins. The [[flower]]s are [[plant sexuality|androdioecious]], produced in small [[corymb]]s in spring, the [[fruit]] being a paired [[samara (fruit)|samara]] with two winged [[seed]]s about 1 cm long with a 3 cm wing.<ref name=focd/><ref name=rushforth>Rushforth, K. (1999). ''Trees of Britain and Europe''. Collins ISBN 0-00-220013-9.</ref>
===Cultivation and uses===
Paperbark Maple is widely grown as an [[ornamental plant]] in temperate regions. It is admired for its decorative [[exfoliation (botany)|exfoliating]] bark, [[translucent]] pieces of which often stay attached to the branches until worn away. It also has spectacular autumn foliage which can include red, orange and pink tones.
It was introduced to cultivation in [[Europe]] in 1901 by [[Ernest Henry Wilson]] for the [[Veitch Nurseries]], and to [[North America]] shortly after.
Recent attempts have been made to acquire new seed stock from wild populations in China because it is believed that the current gene pool of cultivated specimens is very small. [[Plant propagation|Propagation]] of ''Acer griseum'' is somewhat difficult as seeds have the same [[parthenocarpy|parthenocarpic]] tendencies as those of ''[[Acer maximowiczianum]]''.<ref name=gelderen>van Gelderen, C. J., & van Gelderen, D. M. (1999). ''Maples for Gardens: A Color Encyclopedia''.</ref>
==References==
{{reflist}}
<gallery>
Image:Paperbark Maple Acer griseum Brown Seeds 2000px.jpg|Foliage and seeds
Image:Acer griseum5.jpg|Foliage and immature seeds
Image:Acer griseum3.jpg|Trunk
</gallery>
<gallery>
Image:Paperbark Maple Acer griseum Trunk 1860px.jpg|Bark
Image:Paperbark Maple Acer griseum Bark 3008px.jpg|Bark
Image:VolcjiPotok 05.jpg|Bark closeup
</gallery>
[[Category:Acer|griseum]]
[[Category:Flora of China]]
[[da:Papirbark-Løn]]
[[de:Zimt-Ahorn]]
[[es:Acer griseum]]
[[fr:Érable à écorce de papier]]
[[sl:Sivi javor]]