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|familia=Aceraceae
 
|familia=Aceraceae
 
|genus=Acer
 
|genus=Acer
|species=negundo  
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|species=negundo
 
|common_name=Box elder, Box elder maple, Manitoba maple
 
|common_name=Box elder, Box elder maple, Manitoba maple
 
|name_ref=Flora - A Gardener's Encyclopedia
 
|name_ref=Flora - A Gardener's Encyclopedia
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|usda_ref=Flora - A Gardener's Encyclopedia
 
|usda_ref=Flora - A Gardener's Encyclopedia
 
|max_zone=9
 
|max_zone=9
|image=Upload.png
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|image=Acer negundo-78.JPG
 
|image_width=240
 
|image_width=240
 
}}
 
}}
__NOTOC__{{Plantbox
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'''''Acer negundo''''' is a species of [[maple]] native to [[North America]]. '''Box Elder''', '''Boxelder Maple''', and '''Maple Ash''' are its most common names in the United States. Other variant names -- some of which are regional - include Ash Maple, Ash-leaf Maple, Black Ash, California Boxelder, Cutleaf Maple, Cut-leaved Maple, Negundo Maple, Red River Maple, Stinking Ash, Sugar Ash, Three-leaved Maple, and Western Boxelder.  In [[Canada]] it is commonly known as '''Manitoba Maple''' and occasionally as '''Elf Maple'''<ref>[http://cfs.nrcan.gc.ca/index/commtreesprairies/manitobamaple Community trees of the Prairie provinces - Canadian Forest Service<!-- Bot generated title -->]</ref>. In [[Russia]] it is called '''American Maple''' ({{lang-ru|американский клён}}) as well as Ash-leaf Maple ({{lang-ru|клён ясенелистный}}).
| name = ''Acer negundo''
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| common_names =    <!--- if multiple, list all, if none, leave blank -->
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''Acer negundo'' is a small, usually fast-growing and fairly short-lived [[tree]] that grows up to 10-25 m tall, with a trunk diameter of 30-50&nbsp;cm, rarely up to 1 m diameter.  It often has several trunks and can form impenetrable thickets.<ref name="gelderen">van Gelderen, C.J. & van Gelderen, D.M. (1999). ''Maples for Gardens: A Color Encyclopedia''.</ref>
| growth_habit = ?  <!--- tree, shrub, herbaceous, vine, etc -->
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| high = ?  <!--- 1m (3 ft) -->
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The shoots are green, often with a whitish to pink or violet [[wax]]y coating when young.  Branches are smooth, somewhat brittle, and tend to retain a fresh green colour rather than forming a [[bark]] of dead, protective tissue.  The bark on its trunks is pale gray or light brown, deeply cleft into broad ridges, and scaly.<ref name=Keeler />
| wide =    <!--- 65cm (25 inches) -->
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| origin = ?  <!--- Mexico, S America, S Europe, garden, etc -->
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Unlike most other maples (which usually have [[leaf shape|simple]], [[leaf shape|palmate]]ly [[leaf shape|lobe]]d  [[leaf|leaves]]), ''Acer negundo'' has [[leaf shape|pinnate]]ly [[leaf shape|compound]] leaves that usually have three to seven leaflets.  Simple leaves are also occasionally present;  technically, these are single-leaflet compound leaves.  Although some other maples (such as [[Acer griseum|''A. griseum'']], ''[[Acer mandshuricum]]'' and the closely-related [[Acer cissifolium|''A. cissifolium'']]) have [[leaf shape|trifoliate]] leaves, only ''A. negundo'' regularly displays more than three leaflets.
| poisonous =    <!--- indicate parts of plants which are known/thought to be poisonous -->
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| lifespan =    <!--- perennial, annual, etc -->
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The leaflets are about 5-10&nbsp;cm long and 3-7&nbsp;cm wide with slightly serrate margins.  Leafs have a [[translucence|translucent]] light green colour and turn yellow in the [[Autumn|fall]].
| exposure = ?  <!--- full sun, part-sun, semi-shade, shade, indoors, bright filtered (you may list more than 1) -->
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| water = ?  <!--- frequent, regular, moderate, drought tolerant, let dry then soak -->
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The [[flower]]s are small and appear in early spring on drooping [[raceme]]s 10-20&nbsp;cm long. The [[seed]]s are paired [[Samara (fruit)|samara]]s, each seed slender, 1-2&nbsp;cm long, with a 2-3&nbsp;cm incurved wing; they drop in autumn or they may persist through winter.  Seeds are usually both prolific and [[fertile]].
| features =    <!--- flowers, fragrance, fruit, naturalizes, invasive -->
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| hardiness =    <!--- frost sensitive, hardy, 5°C (40°F), etc -->
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Unlike most other maples, ''A. negundo'' is fully [[plant sexuality|dioecious]] and both a "male" and "female" tree are needed for either to reproduce.
| bloom =    <!--- seasons which the plant blooms, if it is grown for its flowers -->
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| usda_zones = ?  <!--- eg. 8-11 -->
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* Winter buds: Terminal buds acute, an eighth of an inch long.  Lateral buds obtuse.  The inner scales enlarge when spring growth begins and often become an inch long before they fall.
| sunset_zones =    <!--- eg. 8, 9, 12-24, not available -->
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* Flowers: April, before the leaves, yellow green; staminate flowers in clusters on slender hairy pedicels one and a half to two inches long.  Pistillate flowers in narrow drooping racemes.
| color = IndianRed
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* Calyx: Yellow green; staminate flowers campanulate, five-lobed, hairy.  Pistillate flowers smaller, five-parted; disk rudimentary.
| image = Acnegundo.jpg
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* Corolla: Wanting.
| image_width = 240px    <!--- leave as 240px if horizontal orientation photo, or change to 180px if vertical -->
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* Stamens: Four to six, exserted; filaments slender, hairy; anthers linear, connective pointed.
| image_caption =    <!--- eg. Cultivated freesias -->
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* Pistil: Ovary hairy, borne on disk, partly enclosed by calyx, two-celled, wing-margined.  Styles separate at base into two stigmatic lobes.
| regnum = Plantae
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* Fruit: Maple keys, full size in early summer.  Borne in drooping racemes, pedicels one to two inches long.  Key an inch and a half to two inches long, nutlets diverging, wings straight or incurved.  September.  Seed half an inch long.  Cotyledons, thin, narrow.<ref name=Keeler />
| divisio = Magnoliophyta
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| classis = Magnoliopsida
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| ordo = Sapindales
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| familia = Aceraceae
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| genus = Acer
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| species = negundo
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}}
   
{{Inc|
 
{{Inc|
 
[[Image:Acer-negundo.jpg|thumb|right|''A. negundo'' leaves and seeds]]
 
[[Image:Acer-negundo.jpg|thumb|right|''A. negundo'' leaves and seeds]]
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{{edit-pests}}<!--- Type pest/disease info below this line, then delete this entire line -->
 
{{edit-pests}}<!--- Type pest/disease info below this line, then delete this entire line -->
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==Cultivars==
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==Varieties==
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Cultivars:
 
*'Auratum' - yellowish leaves with smooth undersides
 
*'Auratum' - yellowish leaves with smooth undersides
 
*'Aureomarginatum' - creamy yellow leaf margins
 
*'Aureomarginatum' - creamy yellow leaf margins
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*'Violaceum' - younger shoots and branches have blueish color
 
*'Violaceum' - younger shoots and branches have blueish color
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===Subspecies===
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Subspecies:
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''A. negundo'' is often discussed as being comprised of three subspecies, each of which was originally described as a separate species.  These are:
 
''A. negundo'' is often discussed as being comprised of three subspecies, each of which was originally described as a separate species.  These are:
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Finally, note that a few botanists treat Boxelder Maple as its own distinct genus (''Negundo aceroides'') but this is not widely accepted.
 
Finally, note that a few botanists treat Boxelder Maple as its own distinct genus (''Negundo aceroides'') but this is not widely accepted.
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==Gallery==
 
==Gallery==
{{photo-sources}}<!-- remove this line if there are already 3 or more photos in the gallery  -->
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<gallery perrow=5>
 
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Image:Acer negundo californicum Tehachapi.jpg| photo 1
<gallery>
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Image:Upload.png| photo 1
   
Image:Upload.png| photo 2
 
Image:Upload.png| photo 2
 
Image:Upload.png| photo 3
 
Image:Upload.png| photo 3
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==References==
 
==References==
*[[Standard Cyclopedia of Horticulture]], by L. H. Bailey, MacMillan Co., 1963
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<references/>
 
<!--- xxxxx  *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381  -->
 
<!--- xxxxx  *Flora: The Gardener's Bible, by Sean Hogan. Global Book Publishing, 2003. ISBN 0881925381  -->
 
<!--- xxxxx  *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432  -->
 
<!--- xxxxx  *American Horticultural Society: A-Z Encyclopedia of Garden Plants, by Christopher Brickell, Judith D. Zuk. 1996. ISBN 0789419432  -->
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{{stub}}
 
{{stub}}
[[Category:Categorize]]
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__NOTOC__
 
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<!--  in order to add all the proper categories, go to http://www.plants.am/wiki/Plant_Categories and copy/paste the contents of the page here, and then follow the easy instructions!    -->
 

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