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In plant taxonomy, commelinids (originally commelinoids) is a of within the , distinguished by having cell walls containing . Well-known commelinids include and relatives (order ), , , , and water hyacinth (order ), , , , and (order ), , , , , , plantains, and bird of paradise flower (order ).

The commelinids are the only clade that the APG IV system has informally named within the monocots. The remaining monocots are a unit. Also known as the commelinid monocots it forms one of three groupings within the monocots, and the final branch; the other two groups are the alismatid monocots and the .


Description
Members of the commelinid clade have containing UV- .


Taxonomy and Phylogeny
The commelinids constitute a well-supported clade within the monocots, and this clade has been recognized in all four APG classification systems. It consists of four orders:

Phylogenetic tree showing position of the commelinids within the monocots

As of (2016) the family is no longer directly placed under commelinids but instead a family of order .


Historical Taxonomy
The commelinids were first recognized as a formal group in 1967 by , who named them the Commelinidae and assigned them to a subclass of (monocots). The name was also used in the 1981 . However, by the release of his 1980 system of classification, Takhtajan had merged this subclass into a larger one, and no longer considered it to be a clade.


Takhtajan system
The treated this as one of six subclasses within the class (=). It consisted of the following:

subclass Commelinidae superorder order order superorder order order order superorder order order order order superorder order order order order order superorder order superorder order order superorder order order order order


Cronquist system
The treated this as one of four subclasses within the class Liliopsida. It consisted of the following:

subclass Commelinidae order order order order order order order


APG system
The APG II system does not use formal botanical names above the rank of order; most of the members were assigned to the clade commelinids in the monocots (its predecessor, the used the clade commelinoids).http://www.mobot.org/mobot/research/apweb/ the official APG website

See also
  • List of commelinid families


Bibliography


External links
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