Editing Nymphaeales (section)

== Classification ==
The Nymphaeales currently include three families and about 70 to 90 species.

{| align="left" style="text-align:left; padding:2.5px; background:#eef"
|-
| style="background:#fff; padding:2.5px; font-size:85%" |order '''Nymphaeales''' 
: '''[[Cabombaceae]]'''
:* ''[[Brasenia]]'' (one species)
:* ''[[Cabomba]]'' (five species)
: '''[[Hydatellaceae]]'''
:* ''[[Trithuria]]'' (12 species)
: '''[[Nymphaeaceae]]'''
:* ''[[Barclaya]]'' (three or four species)
:* ''[[Euryale ferox|Euryale]]'' (one species)
:* ''[[Nuphar]]'' (10-12 species)
:* ''[[Nymphaea]]'' (35-50 species)
:* ''[[Victoria (plant)|Victoria]]'' (three species)

|{{clade| style=font-size:75%;line-height:75%
|label1=Angiosperms
|1={{clade
	|1=''[[Amborella]]''
	|2={{clade
		|label1='''Nymphaeales'''
		|1={{clade
			|1=[[Hydatellaceae]]
			|2={{clade
				|1={{clade
					|1=[[Cabombaceae]]
					|2=[[Nymphaeaceae]]
					}}
				}}
			}}
		|2={{clade
			|1=[[Austrobaileyales]]
			|2={{clade
				|1={{clade
					|1={{clade
						|1=[[magnoliids]]
						|2=[[Chloranthales]]
						}}
					|2={{clade
						|1=[[monocots]]
						|2={{clade
							|1=''[[Ceratophyllum]]''
							|2=[[eudicots]]
							}}
						}}
					}}
				}}
			}}
		}}
	}}
}}
|-style="font-size:90%;"
| colspan=2 | The classification of Nymphaeales and [[phylogenetics|phylogeny]] within the flowering plants, as of APG III (2009).
|}{{Clear}}

This order was not part of the [[APG II system|APG II system's]] 2003 plant classification (unchanged from the [[APG system]] of 1998), which instead had a broadly circumscribed family [[Nymphaeaceae]] (including [[Cabombaceae]]) unplaced in any order. The [[APG III system]] did separate the Cabombaceae from the Nymphaeaceae and placed them in the order Nymphaeales together with the Hydatellaceae.  The family [[Hydatellaceae]] was placed among the monocots in previous systems, but a 2007 study found that the family belongs to the Nymphaeales.<ref>{{cite journal |title=Hydatellaceae identified as a new branch near the base of the angiosperm phylogenetic tree |journal=Nature |volume=446 |issue=7133 |pages=312–5 |year=2007 |pmid=17361182 |doi=10.1038/nature05612 |last1=Saarela |first1=J. M. |last2=Rai |first2=H. S. |last3=Doyle |first3=J. A. |last4=Endress |first4=P. K. |last5=Mathews |first5=S. |last6=Marchant |first6=A. D. |last7=Briggs |first7=B. G. |last8=Graham |first8=S. W. |bibcode=2007Natur.446..312S |s2cid=4415881 |url=https://digitalcommons.lsu.edu/cgi/viewcontent.cgi?article=3652&context=biosci_pubs |display-authors=1}}</ref> In the [[APG IV system]], Hydatellaceae, Cabombaceae and Nymphaeaceae are the three families included in the Nymphaeales.<ref name=APGIV>{{Cite journal|author=Angiosperm Phylogeny Group |year=2016|title=An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG IV|journal=[[Botanical Journal of the Linnean Society]]|volume=181|issue=1|pages=1–20|issn=0024-4074|doi=10.1111/boj.12385|doi-access=free}}</ref>

Some earlier systems, such as Cronquist's system of 1981, often included the [[Ceratophyllaceae]] and [[Nelumbonaceae]] in the Nymphaeales. Although, the [[Takhtajan system]] of 1980 separated the [[Nelumbonales]], the new order was retained alongside the Nymphaeales in the superorder Nymphaeanae.

The [[Cronquist system]] placed the Nymphaeales in subclass [[Magnoliidae sensu Cronquist|Magnoliidae]], in class [[Magnoliopsida]] [=[[dicotyledons]]].  In addition, Cronquist included the [[Ceratophyllaceae]] and split the family Barclayaceae from the Nymphaeaceae.  Under the [[APG II system]], the family Cabombaceae was included within the Nymphaeaceae, but could optionally be recognized separately.  As of [[APG III system|APG III]], the two families are recognized separately.

The [[Dahlgren system]] placed the Nymphaeales with the [[Piperales]] in superorder Nymphaeanae, within subclass Magnoliideae (dicotyledons). [[Thorne system (1992)|Thorne's 1992 system]] (and 2000 revision) placed the Nymphaeales as the sole order in the superorder Nymphaeanae within subclass Magnoliideae (=dicotyledons).

{| class="wikitable" align="left" style="margin-left:1em"
|+'''Comparison of the Nymphaeales across five systems'''
!style="background:lightgreen" align="center" width="160px" | [[APG III system]]<ref name="APG3">{{cite journal | journal=[[Botanical Journal of the Linnean Society]] | volume=161 | pages=105–121 | author=Angiosperm Phylogeny Group | year=2009 | title=An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III | doi=10.1111/j.1095-8339.2009.00996.x | issue=2| doi-access=free }}</ref><br/>Nymphaeales
!style="background:lightgreen" align="center" width="160px" | [[Takhtajan system]]<ref name="Takhtajan">{{cite journal | last=Takhtajan | first=Armen L. | year=1980 | title=Outline of the classification of flowering plants (Magnoliophyta) | journal=The Botanical Review | volume=46 | issue=3 | pages=225–359 | doi=10.1007/BF02861558 | s2cid=30764910 }}</ref><br/>Nymphaeales
!style="background:lightgreen" align="center" width="160px" | [[Cronquist system]]<ref name="Cronquist">{{cite book | last=Cronquist | first=Arthur | year=1981 | title=An Integrated System of Classification of Flowering Plants | url=https://archive.org/details/integratedsystem0000cron | url-access=registration | location=New York | publisher=Columbia University Press | isbn=978-0-231-03880-5 }}</ref><br/>Nymphaeales
!style="background:lightgreen" align="center" width="160px" | [[Dahlgren system]]<ref name="Dahlgren">{{cite journal | last=Dahlgren | first=R.M.T. | year=1980 | title = A revised system of classification of angiosperms | journal= Botanical Journal of the Linnean Society | volume=80 | issue=2 | pages=91–124 | doi = 10.1111/j.1095-8339.1980.tb01661.x }}</ref><br/>Nymphaeales
!style="background:lightgreen" align="center" width="160px" | [[Thorne system (1992)]]<ref name="Thorne 1992">{{cite journal | last=Thorne | first=R. F. | year=1992 | title= Classification and geography of the flowering plants | journal= Botanical Review | volume=58 | pages=225–348 | doi= 10.1007/BF02858611 | issue=3| s2cid=40348158 }}</ref> & (2000)<ref name="Thorne 2000">{{cite journal | last=Thorne | first=R. F. | year=2000 | title= The classification and geography of the flowering plants: Dicotyledons of the class Angiospermae | journal= Botanical Review | volume=66 | issue=4 | pages=441–647 |doi= 10.1007/BF02869011 | s2cid=43430454 }}</ref><br/>Nymphaeales
|-
| [[Hydatellaceae]]
| colspan=4 align="center" style="background:lightgrey" | ''among monocots, as Hydatellales''
|-
| [[Cabombaceae]]
| [[Cabombaceae]]
: ''Brasenia'', ''Cabomba''
| [[Cabombaceae]]
: ''Brasenia'', ''Cabomba''
| [[Cabombaceae]]
| [[Cabombaceae]]
: ''Brasenia'', ''Cabomba''
|-
| rowspan=2 | [[Nymphaeaceae]]
| rowspan=2 | [[Nymphaeaceae]]
: subf. Barclayoideae, Euryaloideae, Nymphaeoideae
| [[Barclayaceae]]
: ''Barclaya''
| rowspan=2 | [[Nymphaeaceae]]
| rowspan=2 | [[Nymphaeaceae]]
: ''Barclaya'', ''Euryale'', ''Nuphar'', ''Nymphaea'', ''Ondinea'', ''Victoria''
|-
| [[Nymphaeaceae]]
: ''Euryale'', ''Nuphar'', ''Nymphaea'', ''Ondinea'', ''Victoria''
|-
| style="background:lightgrey" | sister to eudicot clade
| [[Ceratophyllaceae]]
| [[Ceratophyllaceae]]
| [[Ceratophyllaceae]]
| rowspan=2 style="background:lightgrey" | in Ranunculanae
|-
| style="background:lightgrey" | in Proteales
| style="background:lightgrey" | in Nelumbonales
| [[Nelumbonaceae]]
| style="background:lightgrey" | in Magnolianae
|}
{{Clear}}