Editing Allium fistulosum (section)

{{Short description|Species of plant}}
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{{Use dmy dates|date=April 2024}}
{{Speciesbox
| name = Welsh onion
| taxon = Allium fistulosum
| parent = Allium subg. Cepa
| image = Welsh onion.jpg
| image_caption = ''Allium fistulosum'' at a farm
| image2 = Scallion 2.png
| image2_caption = ''Allium fistulosum'' from a store
| authority = [[Carl Linnaeus|L.]]
| synonyms_ref = <ref name=peggy />
| synonyms = 
*''Allium bouddae'' <small>Debeaux</small>
*''Allium kashgaricum'' <small>Prokh.</small>
*''Cepa fissilis'' <small>Garsault</small>
*''Cepa fistulosa'' <small>(L.) Gray</small>
*''Cepa ventricosa'' <small>Moench</small>
*''Kepa fistulosa'' <small>(L.) Raf.</small>
*''Phyllodolon fistulosum'' <small>(L.) Salisb.</small>
*''Porrum fistulosum'' <small>(L.) Schur</small>
}}
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'''''Allium fistulosum''''', the '''Welsh onion''', also commonly called '''bunching onion''', '''long green onion''', '''Japanese bunching onion''', and '''spring onion''', is a species of [[perennial plant]], often considered to be a kind of [[scallion]].

The species is very similar in taste and odor to the related [[common onion]], ''Allium cepa'', and hybrids between the two ([[tree onion]]s) exist. ''A. fistulosum'', however, does not develop [[bulb]]s, and its leaves and [[Scape (botany)|scapes]] are hollow (''fistulosum'' means "hollow"). Larger varieties of ''A. fistulosum'', such as the Japanese ''negi'', resemble the [[leek]], whilst smaller varieties resemble [[chive]]s. ''A. fistulosum'' can multiply by forming perennial evergreen clumps.<ref>{{cite web |url=http://www.floridata.com/ref/A/alli_fis.cfm |title=Floridata Profile |work=floridata.com |access-date=7 March 2009 |archive-date=17 April 2023 |archive-url=https://web.archive.org/web/20230417100905/https://floridata.com/ref/A/alli_fis.cfm |url-status=live }}</ref><ref name="TKG">{{cite book |last=Thompson |first=Sylvia |title=The Kitchen Garden |url=https://archive.org/details/isbn_9780553081381 |url-access=registration |publisher=Bantam Books |year=1995 |isbn=9780553081381}}</ref> It is also grown in a bunch as an [[ornamental plant]].