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|Max wd metric=ft
|Max wd metric=ft
|width_ref=Flora - A Gardener's Encyclopedia
|width_ref=Flora - A Gardener's Encyclopedia
|origin=China
|lifespan=perennial
|lifespan=perennial
|life_ref=Flora - A Gardener's Encyclopedia
|life_ref=Flora - A Gardener's Encyclopedia
|exposure=sun
|exposure=sun
|sun_ref=Flora - A Gardener's Encyclopedia
|sun_ref=Flora - A Gardener's Encyclopedia
|features=flowers
|features=deciduous, flowers
|flower_season=early spring, mid spring, late spring
|flower_season=early spring, mid spring, late spring
|flower_ref=Flora - A Gardener's Encyclopedia
|flower_ref=Flora - A Gardener's Encyclopedia
|Temp Metric=°F
|Min Temp Num=-35
|Temp Metric=°C
|min_zone=4
|min_zone=4
|usda_ref=Flora - A Gardener's Encyclopedia
|usda_ref=Flora - A Gardener's Encyclopedia
|max_zone=8
|max_zone=8
|sunset_zones=2-9, 14-21, 31-41
|image=Acer griseum Morton 836-58-7.jpg
|image_width=200
| sunset_zones = 2-9, 14-21, 31-41
| image = Upload.png <!--- Freesia.jpg -->
| image_width = 240px <!--- leave as 240px if horizontal orientation photo, or change to 180px if vertical -->
}}
}}
'''''Acer griseum''''' ('''Paperbark Maple'''; {{zh|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 6-9 m (20-30 ft) tall, 5-6 m (15-25 ft) wide, with a trunk up to 70 cm (2 ft) diameter.<ref name=mapletrees.com>http://www.maple-trees.com/pages/paperbark-maple.php</ref> 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>
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.
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>
{{Inc|
{{Inc|
Acer griseum, Pax (A. nikoense var. griseum, Franch.). Tree, to 25 ft., with cinnamon-brown bark separating in thin flakes: branchlets pubescent: lfts. short-stalked, elliptic or ovate-oblong, 1-2 in. long, acute, coarsely toothed with large bluntish teeth, the lateral ones unequal, deeply dentate on the outer margin, entire or nearly so on the inner, glaucous and pubescent beneath; petioles densely hairy: fls. rather large, in few-fid, hairy corymbs: fr. pendulous on short stalks, with the peduncle scarcely 1/2in. long; nutlets thick, tomentose; wings spreading at an acute angle. W. China.—-J.H.S. 29:98. R.H. 1912:127.—Remarkable for its flaky bark, resembling that of the river birch; hardy at the Arnold Arboretum.
Acer griseum, Pax (A. nikoense var. griseum, Franch.). Tree, to 25 ft., with cinnamon-brown bark separating in thin flakes: branchlets pubescent: lfts. short-stalked, elliptic or ovate-oblong, 1-2 in. long, acute, coarsely toothed with large bluntish teeth, the lateral ones unequal, deeply dentate on the outer margin, entire or nearly so on the inner, glaucous and pubescent beneath; petioles densely hairy: fls. rather large, in few-fid, hairy corymbs: fr. pendulous on short stalks, with the peduncle scarcely 1/2in. long; nutlets thick, tomentose; wings spreading at an acute angle. W. China.—Remarkable for its flaky bark, resembling that of the river birch; hardy at the Arnold Arboretum.
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:''More information about this species can be found on the [[Acer|genus page]].''
:''More information about this species can be found on the [[Acer|genus page]].''
==Cultivation==
==Cultivation==
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==Cultivars==
==Varieties==
==Gallery==
==Gallery==
<gallery>
<gallery>
Paperbark Maple Acer griseum Bark 3008px.jpg| photo 1
File:Acer griseum3.jpg| photo 2
Paperbark Maple Acer griseum Brown Seeds 2000px.jpg| photo 3
</gallery>
</gallery>
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