Difference between revisions of "Shirasawa's Maple"

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{{SPlantbox
 
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|familia=Aceraceae
 
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|genus=Acer  
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|genus=Acer
 
|species=shirasawanum
 
|species=shirasawanum
 
|common_name=Shirasawa's Maple
 
|common_name=Shirasawa's Maple
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|sun_ref=Flora - A Gardener's Encyclopedia
 
|sun_ref=Flora - A Gardener's Encyclopedia
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|features=deciduous
 
|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
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|Temp Metric=°F
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|Min Temp Num=-35
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|Temp Metric=°C
 
|min_zone=6
 
|min_zone=6
 
|usda_ref=Flora - A Gardener's Encyclopedia
 
|usda_ref=Flora - A Gardener's Encyclopedia
 
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|image=Upload.png
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|sunset_zones=3-6, 14-16, 31-35, 37, 39
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|image=Acer shirasawanum shape.JPG
 
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'''''Acer shirasawanum''''' ('''Shirasawa's Maple''' or '''Fullmoon Maple''') is a species of [[maple]] native to [[Japan]], on central and southern [[Honshū]] ([[Fukushima Prefecture]] southwards), [[Shikoku]], and [[Kyūshū]].<ref name=osu>Okayama science university: [http://had0.big.ous.ac.jp/plantsdic/angiospermae/dicotyledoneae/choripetalae/aceraceae/ooitayameigetsu/ooitayameigetsu.htm ''Acer shirasawanum''] (in Japanese; [http://translate.google.com/translate?hl=en&sl=ja&u=http://had0.big.ous.ac.jp/plantsdic/angiospermae/dicotyledoneae/choripetalae/aceraceae/ooitayameigetsu/ooitayameigetsu.htm&sa=X&oi=translate& google translation])</ref>
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| name = ''Acer shirasawanum''
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| common_names = Shirasawa's Maple
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It is a [[deciduous]] large [[shrub]] or small [[tree]] growing to 8–15 m tall with a [[trunk (botany)|trunk]] up to 50&nbsp;cm diameter. The [[bark]] is smooth on both young and old trees. The shoots are slender, and hairless. The [[leaf|leaves]] are rounded, 4.5–8&nbsp;cm long and 6–12&nbsp;cm broad, palmately veined and lobed, with 9–13 (rarely 7) serrate shallowly incised lobes; they are hairless, or thinly hairy at first with white hairs; the petiole is 3–7&nbsp;cm long and hairless. In autumn, the leaves turn bright gold or orange to dark red. The [[flower]]s are 1&nbsp;cm diameter, with five dark purplish-red sepals, five small whitish petals (soon lost), and red stamens; they are [[plant sexuality|andromonoecious]], with inflorescences containing flowers with either both sexes, or just male, and are produced 10–20 together in erect terminal [[corymb]]s in early spring soon after the leaves appear. The [[fruit]] is a paired [[samara (fruit)|samara]] with the nutlets 5–10&nbsp;mm diameter with a 20–25&nbsp;mm wing, erect above the leaves, bright red maturing brown.<ref name=osu/><ref name=osu1>Okayama science university: [http://had0.big.ous.ac.jp/plantsdic/angiospermae/dicotyledoneae/choripetalae/aceraceae/ooitayameigetsu/ooitayameigetsu2.htm ''Acer shirasawanum'' flowers] (in Japanese; [http://translate.google.com/translate?hl=en&sl=ja&u=http://had0.big.ous.ac.jp/plantsdic/angiospermae/dicotyledoneae/choripetalae/aceraceae/ooitayameigetsu/ooitayameigetsu2.htm&sa=X&oi=translate& google translation])</ref><ref name=rushforth>Rushforth, K. (1999). ''Trees of Britain and Europe''. Collins ISBN 0-00-220013-9.</ref>
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| growth_habit = deciduous shrub/tree
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| high = 10-15 m
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It can be distinguished from its close relatives ''[[Acer japonicum]]'' (ハウチワカエデ ''hauchiwakaede'') and ''[[Acer sieboldianum]]'' (コハウチワカエデ ''kohauchiwakaede'') by its hairless shoots; from ''A. sieboldianum'' also by its red, not yellow, flowers.<ref name=kanagawa>Kanagawa Prefecture trees and shrubs: [http://www.geocities.jp/greensv88/jumoku-zz-kohauchiwakaede.htm ''Acer sieboldianum''] (in Japanese; [http://translate.google.com/translate?hl=en&sl=ja&u=http://www.geocities.jp/greensv88/jumoku-zz-kohauchiwakaede.htm&sa=X&oi=translate& google translation]). [http://www.webcitation.org/5klXzXdfc Archived] 2009-10-24.</ref><ref name=ij>Infoseek Japan: [http://nosaku.hp.infoseek.co.jp/2000/s001114a.html Maples] (in Japanese; [http://translate.google.com/translate?hl=en&sl=ja&u=http://nosaku.hp.infoseek.co.jp/2000/s001114a.html&sa=X&oi=translate& google translation])</ref>
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| wide = 20-40 cm trunk diameter
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Some authorities, especially in [[horticulture]], still use the older classification including the species in ''A. japonicum''; many specimens in cultivation also remain mislabelled as ''A. japonicum''.<ref name="gelderen">''Maples for Gardens: A Color Encyclopedia'' by C.J. van Gelderen & D.M. van Gelderen, 1999</ref>
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| lifespan = perennial
 
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| color = IndianRed
 
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|unranked_ordo = Rosids
 
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|genus = Acer
 
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|species = shirasawanum
 
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It is grown as an [[ornamental tree]] in [[gardens]] for its foliage and fall colour, but is seen far less commonly than ''[[Acer palmatum]]'' (Japanese Maple). A number of [[cultivar]]s have been selected; the lighter-coloured ''A. shirasawanum'' cultivar 'Aureum' is very widely grown, much more common in cultivation than the main species; it is [[plant propagation|propagated]] by [[grafting]] onto more hardy and fast-growing ''Acer'' species, in particular ''A. palmatum'' and ''A. japonicum''.<ref name="gelderen"/>
  
 
:''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==
 
==Cultivars==
 
*[[Acer shirasawanum 'Aureum'|''A. shirasawanum'' 'Aureum']]
 
*[[Acer shirasawanum 'Aureum'|''A. shirasawanum'' 'Aureum']]
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Two [[variety (biology)|varieties]] are accepted:<ref name="gelderen"/>
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*''Acer shirasawanum'' subsp. ''shirasawanum''
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*''Acer shirasawanum'' subsp. ''tenuifolium''
  
 
==Gallery==
 
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<gallery>
 
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Image:Upload.png| photo 1
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Image:Acer shirasawanum.jpg|Leaves and immature fruit
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Image:Upload.png| photo 2
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Image:Acer shirasawanum leaves.jpg|Cultivar 'Aureum', foliage
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Image:Upload.png| photo 3
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Image:Acer shirasawanum 'Aureum' JPG1b.jpg|Cultivar 'Aureum', foliage in autumn
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Image:Acer shirasawanum 'Aureum' JPG1a.jpg|Cultivar 'Aureum', in Arboretum Robert Lenoir [[Rendeux]] ([[Belgium]])
 
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__NOTOC__

Latest revision as of 01:55, 29 October 2010


Acer shirasawanum shape.JPG


Plant Characteristics
Habit   tree

Height: ⇕ 20 ft"ft" can not be assigned to a declared number type with value 20.
Width: ⇔ 20 ft"ft" can not be assigned to a declared number type with value 20.
Lifespan: ⌛ perennial
Bloom: ❀ early spring, mid spring, late spring
Cultivation
Exposure: ☼ part-sun
Features: ✓ deciduous
Minimum Temp: ☃ -35°C-31 °F <br />238.15 K <br />428.67 °R <br />
USDA Zones: 6 to 8
Sunset Zones: 3-6, 14-16, 31-35, 37, 39
Scientific Names

Aceraceae >

Acer >

shirasawanum >


Acer shirasawanum (Shirasawa's Maple or Fullmoon Maple) is a species of maple native to Japan, on central and southern Honshū (Fukushima Prefecture southwards), Shikoku, and Kyūshū.[1]

It is a deciduous large shrub or small tree growing to 8–15 m tall with a trunk up to 50 cm diameter. The bark is smooth on both young and old trees. The shoots are slender, and hairless. The leaves are rounded, 4.5–8 cm long and 6–12 cm broad, palmately veined and lobed, with 9–13 (rarely 7) serrate shallowly incised lobes; they are hairless, or thinly hairy at first with white hairs; the petiole is 3–7 cm long and hairless. In autumn, the leaves turn bright gold or orange to dark red. The flowers are 1 cm diameter, with five dark purplish-red sepals, five small whitish petals (soon lost), and red stamens; they are andromonoecious, with inflorescences containing flowers with either both sexes, or just male, and are produced 10–20 together in erect terminal corymbs in early spring soon after the leaves appear. The fruit is a paired samara with the nutlets 5–10 mm diameter with a 20–25 mm wing, erect above the leaves, bright red maturing brown.[1][2][3]

It can be distinguished from its close relatives Acer japonicum (ハウチワカエデ hauchiwakaede) and Acer sieboldianum (コハウチワカエデ kohauchiwakaede) by its hairless shoots; from A. sieboldianum also by its red, not yellow, flowers.[4][5]

Some authorities, especially in horticulture, still use the older classification including the species in A. japonicum; many specimens in cultivation also remain mislabelled as A. japonicum.[6]

It is grown as an ornamental tree in gardens for its foliage and fall colour, but is seen far less commonly than Acer palmatum (Japanese Maple). A number of cultivars have been selected; the lighter-coloured A. shirasawanum cultivar 'Aureum' is very widely grown, much more common in cultivation than the main species; it is propagated by grafting onto more hardy and fast-growing Acer species, in particular A. palmatum and A. japonicum.[6]

More information about this species can be found on the genus page.

Cultivation

Do you have cultivation info on this plant? Edit this section!

Propagation

Do you have propagation info on this plant? Edit this section!

Pests and diseases

Do you have pest and disease info on this plant? Edit this section!

Cultivars

Two varieties are accepted:[6]

  • Acer shirasawanum subsp. shirasawanum
  • Acer shirasawanum subsp. tenuifolium

Gallery

  • Leaves and immature fruit

  • Cultivar 'Aureum', foliage

  • Cultivar 'Aureum', foliage in autumn

  • Cultivar 'Aureum', in Arboretum Robert Lenoir Rendeux (Belgium)

References

External links


  1. ↑ 1.0 1.1 Okayama science university: Acer shirasawanum (in Japanese; google translation)
  2. ↑ Okayama science university: Acer shirasawanum flowers (in Japanese; google translation)
  3. ↑ Rushforth, K. (1999). Trees of Britain and Europe. Collins ISBN 0-00-220013-9.
  4. ↑ Kanagawa Prefecture trees and shrubs: Acer sieboldianum (in Japanese; google translation). Archived 2009-10-24.
  5. ↑ Infoseek Japan: Maples (in Japanese; google translation)
  6. ↑ 6.0 6.1 6.2 Maples for Gardens: A Color Encyclopedia by C.J. van Gelderen & D.M. van Gelderen, 1999
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