| Revision as of 12:14, 11 June 2006 editMarudubshinki (talk | contribs)49,641 editsm Robot: converting/fixing HTML← Previous edit | Revision as of 17:34, 22 June 2006 edit undoMPF (talk | contribs)Extended confirmed users42,236 editsm moved Amborella trichopoda to Amborella: sole species in genusNext edit → | ||
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| | regnum = '']ae'', <br>''']''' | | regnum = '']ae'', <br>''']''' | ||
| | ordo = unplaced | | ordo = unplaced | ||
| | familia = ''Amborellaceae'' | | familia = '']'' | ||
| | genus = '''''Amborella''''' | |||
| | familia_authority = Pichon (1948) | |||
| | binomial = ''Amborella trichopoda'' | |||
| | subdivision_ranks = genera | |||
| | binomial_authority = ] | |||
| | subdivision = see text | |||
| }} | }} | ||
| '''''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. | |||
| '''''Amborellaceae''''' is the ] of a family of ]. Such a family has been recognised by many taxonomists, at least after the plants were discovered, which was relatively recently. | |||
| 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. | |||
| The ], of 2003 (unchanged from the ], of 1998), does recognise 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 ]. | |||
| ''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. | |||
| ---- | |||
| Individuals of this species in the wild are being reduced by ] and ]. | |||
| The suggests that the family could be given its own order '']''. This suggestion may be taken up in APG III. | |||
| ⚫ | ==External links== | ||
| ---- | |||
| * | |||
| ⚫ | * in http://delta-intkey.com | ||
| The ], of 1981, assigned the family | |||
| : 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'' . | |||
| ---- | |||
| ⚫ | |||
| ⚫ | |||
| :* | |||
| ] | ] | ||
| ] | ] | ||
| ] | |||
| ] | |||
| ] | ] | ||
| ] | |||
| ] | |||
| ] | |||
Revision as of 17:34, 22 June 2006
| Amborella | |
|---|---|
| Scientific classification | |
| Kingdom: | Plantae, angiosperms |
| Order: | unplaced |
| Family: | Amborellaceae |
| Genus: | Amborella |
| Binomial name | |
| Amborella trichopoda Baill. | |
Amborella trichopoda is a rare understory shrub found only on the island of New Caledonia. It is of great interest in plant systematics because modern systematics, using molecular data, places it at or near the base of the flowering plants. 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 leaves are alternately arranged, evergreen, simple, with a serrated margin, and about 8–10 cm long. Amborella trichopoda produces small flowers 4–8 mm across in loose clusters, each flower with several spirally-arranged tepals.
Amborella trichopoda is dioecious: each flower produces both stamens and carpels, but only one sex develops fully and fertile in the flowers of an individual plant, the structures of the other sex remaining undeveloped. The fruit is a red berry containing a single seed, 5–8 mm long.
Individuals of this species in the wild are being reduced by overgrazing and habitat destruction.
External links
- National Tropical Botanical Garden (Hawaii, USA): article with detailed photos of plants in cultivation
- Amborellaceae in L. Watson and M.J. Dallwitz (1992 onwards). The families of flowering plants: descriptions, illustrations, identification, information retrieval. http://delta-intkey.com