Amborella: Difference between revisions

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Revision as of 17:34, 22 June 2006 editMPF (talk \| contribs)Extended confirmed users42,236 editsm moved Amborella trichopoda to Amborella: sole species in genus← Previous edit		Revision as of 02:45, 20 August 2006 edit undoKP Botany (talk \| contribs)Extended confirmed users10,588 edits Removed "discovered ... recently" sentence--ambiguous.Next edit →
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	\| regnum = '']ae'', <br>''']'''		\| regnum = '']ae'', <br>''']'''
	\| ordo = unplaced		\| ordo = unplaced
	\| familia = '']''		\| familia = ''Amborellaceae''
			\| familia_authority = Pichon (1948)
	\| genus = '''''Amborella'''''
			\| subdivision_ranks = genera
	\| binomial = ''Amborella trichopoda''
			\| subdivision = see text
	\| binomial_authority = ]
	}}		}}

			'''''Amborellaceae''''' is the ] of a family of ].
	'''''Amborella trichopoda''''' is a rare understory ] found only on the island of ]. It is of great interest in plant systematics because modern systematics, using molecular data, places it at or near the base of the ]s. That is, it represents a line of flowering plants that very early on diverged (about 130 millions years ago) from all the other extant species of flowering plants, and so gives us some idea about what the ancestral flowering plants were like.

			The ], of 2003 (unchanged from the ], of 1998), recognises such a family and leaves it unplaced as to order. It is not placed at all beyond being accepted as the most basic lineage in the clade ''']'''. The family consists of only a single species, '']'' of ].
	The ] are alternately arranged, ], simple, with a serrated margin, and about 8–10 cm long. ''Amborella trichopoda'' produces small ]s 4–8 mm across in loose clusters, each flower with several spirally-arranged ]s.

			----
	''Amborella trichopoda'' is ]: each flower produces both ]s and ]s, but only one sex develops fully and fertile in the flowers of an individual plant, the structures of the other sex remaining undeveloped. The ] is a red berry containing a single ], 5–8 mm long.

			The suggests that the family could be given its own order '']''. This suggestion may be taken up in APG III.
	Individuals of this species in the wild are being reduced by ] and ].

			----
⚫	==External links==

	*
			The ], of 1981, assigned the family
⚫	* in http://delta-intkey.com
			: to the order '']''
			:: in subclass '']'',
			::: in class '']'' ]]
			:::: of division '']'' .

			----

			The ] placed it
			: in the order '']'', which was assigned
			:: to superorder '']'',
			::: in subclass ''Magnoliideae'' ,
			:::: in class ''Magnoliopsida'' .

			----

			The ] placed it
			: in the order ''Laurales'', which was assigned
			:: to superorder ''Magnolianae''
			::: in subclass ''Magnoliideae'' ,
			:::: in class ''Magnoliopsida'' .

			----

		⚫	''External links :''
		⚫	:* in L. Watson and M.J. Dallwitz (1992 onwards). '': descriptions, illustrations, identification, information retrieval.'' Version: 3rd May 2006. http://delta-intkey.com
			:*

	]		]
	]		]

	]
	]
	]		]
	]
	]
	]

Revision as of 02:45, 20 August 2006

Amborella
Scientific classification
Kingdom:	Plantae, angiosperms
Order:	unplaced
Family:	Amborellaceae Pichon (1948)
genera
see text

Amborellaceae is the botanical name of a family of flowering plants.

The APG II system, of 2003 (unchanged from the APG system, of 1998), recognises such a family and leaves it unplaced as to order. It is not placed at all beyond being accepted as the most basic lineage in the clade angiosperms. The family consists of only a single species, Amborella trichopoda of New Caledonia.

The AP-website suggests that the family could be given its own order Amborellales. This suggestion may be taken up in APG III.

The Cronquist system, of 1981, assigned the family

to the order Laurales

in subclass Magnoliidae,

in class Magnoliopsida

of division Magnoliophyta .

The Thorne system (1992) placed it

in the order Magnoliales, which was assigned

to superorder Magnolianae,

in subclass Magnoliideae ,

in class Magnoliopsida .

The Dahlgren system placed it

in the order Laurales, which was assigned

to superorder Magnolianae

in subclass Magnoliideae ,

in class Magnoliopsida .

External links :

Amborellaceae in L. Watson and M.J. Dallwitz (1992 onwards). The families of flowering plants: descriptions, illustrations, identification, information retrieval. Version: 3rd May 2006. http://delta-intkey.com
NCBI Taxonomy Browser

Categories: