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{{Refimprove|date=March 2013}}
{{italic title}}
{{taxobox
|name = ''Caragana arborescens''
|image = Caragana arborescens.jpg
|image_caption = Shelter break of ''Caragana arborescens''
|regnum = [[Plant]]ae
|unranked_divisio = [[Angiosperms]]
|unranked_classis = [[Eudicots]]
|unranked_ordo = [[Rosids]]
|ordo = [[Fabales]]
|familia = [[Fabaceae]]
|genus = ''[[Caragana]]''
|sectio = ''Caragana''
|species = '''''C. arborescens'''''
|binomial = ''Caragana arborescens''
|binomial_authority = [[Jean-Baptiste Lamarck|Lam.]]
}}

'''''Caragana arborescens''''', the '''Siberian peashrub''',<ref>{{PLANTS|id=CAAR18|taxon=Caragana arborescens|accessdate=10 January 2016}}</ref> '''Siberian pea-tree''',<ref name=BSBI07>{{cite web|title=BSBI List 2007 |publisher=Botanical Society of Britain and Ireland |url=http://www.bsbi.org.uk/BSBIList2007.xls |format=xls |archive-url=http://www.webcitation.org/6VqJ46atN?url=http://www.bsbi.org.uk/BSBIList2007.xls |archive-date=2015-01-25 |accessdate=2014-10-17 |deadurl=yes |df= }}</ref> or '''caragana''', is a species of [[legume]] native to [[Siberia]] and parts of [[China]] ([[Heilongjiang]] [[Xinjiang]]) and neighboring [[Mongolia]] and [[Kazakhstan]].<ref name=eflora>{{cite web|url=http://www.efloras.org/florataxon.aspx?flora_id=2&taxon_id=200011995 |title=''Caragana arborescens'' |author=Yingxin Liu, Chang Zhaoyang & Gennady P. Yakovlev |work=Flora of China |publisher=Missouri Botanical Garden, St. Louis, MO & Harvard University Herbaria, Cambridge, MA |accessdate=4 July 2012}}</ref> It was taken to the [[United States]] by Eurasian immigrants, who used it as a food source while travelling west. In some areas of the United States it is considered an [[invasive species]].

== Description ==
It is a [[perennial]] [[shrub]] or small [[tree]] up to {{convert|2|-|6|m|abbr=on}} tall.<ref name=eflora/> Typically, it has a moderate to fast growth rate, being able to grow one to three feet during the first year after trimming.

The [[Leaf|leaves]] vary from light green to dark green, and are alternate and compound with many small leaflets. Fragrant yellow [[flower]]s bloom in May or June. The [[fruits]] are legumes which contain many [[seed]]s, and ripen in July.<ref name=kansas>[http://www.kansasforests.org/programs/conservationtrees/products/shrubs/caragana.shtml Kansas Forest Service: Caragana arborescens] {{webarchive |url=https://web.archive.org/web/20150214045030/http://www.kansasforests.org/programs/conservationtrees/products/shrubs/caragana.shtml |date=February 14, 2015 }}</ref>

== Cultivation ==
''Caragana arborescens'' is [[Plant hardiness|hardy]] to [[Hardiness zone|USDA zone]] 2. It tolerates a variety of [[soil]]s, but prefers good drainage. It is [[Drought tolerance|drought tolerant]],<ref name="pfaf">[http://www.pfaf.org/user/Plant.aspx?LatinName=Caragana+arborescens Plants for a Future: ''Caragana arborescens'']</ref>
and may drop its leaves in severe drought.

It can be trimmed back to the root, with 6 to 12 inches remaining aboveground, when it is desired to appear more like a bush than a tree. It will adapt well to this trimming if adequate water and nitrogen-rich fertilizer is supplied, and will regrow about 4 feet per year until reaching the desired height.

''Caragana arborescens'' has no known serious disease problems. [[Grasshopper]]s can defoliate it, but it recovers well from the attacks. There are no known burrowing animals that feed on the root system.

== Uses ==
''Caragana arborescens'' can be grown as an [[ornamental plant]] and [[bonsai]]. It has an extensive root system, and can be used in [[erosion control]]. The fragrant flowers attract [[bee]]s.

The seeds are edible, but should be cooked before being eaten. There have been no verified cases of poisoning from consuming the seeds.{{Citation needed|date=February 2015}} The flowers are also edible, and can be used in [[salad]]s.

It is recommended for planting in the outer rows of multi-row plantings. It can be used to neutralize soil to prepare for further planting. A legume, ''C. arborescens'' [[nitrogen fixation|fixes nitrogen]]. It is suitable for planting in single-row field windbreaks where a dense, short barrier is desired.

''C. arborescens'' is used for nesting by several [[Passerine|songbirds]]. The seeds are occasionally eaten by a few songbirds. The plant is not a preferred food for browsing animals, but its fragrant flowers attract many pollen-consuming animals.

== References ==
{{reflist}}

{{commons category|Caragana arborescens}}

== External links ==
*[http://www.ars-grin.gov/cgi-bin/npgs/html/splist.pl?2061 Germplasm Resources Information Network: Caragana arborescens Lam.]
*[http://ucjeps.berkeley.edu/cgi-bin/get_JM_treatment.pl?3691,3885,3886 Jepson Manual Treatment]
*[http://www.hort.purdue.edu/newcrop/duke_energy/Caragana_arborescens.html Purdue New Crops Profile]
*[http://www.pfaf.org/user/Plant.aspx?LatinName=Caragana+boisii Siberian pea-tree]
*[http://www.makebonsai.com/guide/bonsailink.asp?quicklink=5019&name=Caragana_arborescens Caragana arborescens Siberian Pea Tree Bonsai Guide]

[[Category:Hedysareae]]
[[Category:Flora of China]]
[[Category:Flora of Kazakhstan]]
[[Category:Flora of Mongolia]]
[[Category:Flora of Russia]]
[[Category:Flora of Siberia]]
[[Category:Edible legumes]]
[[Category:Edible nuts and seeds]]
[[Category:Invasive plant species]]

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