Alismatales

Alismatales

Taxobox
name = Alismatales



image_caption = "Alisma plantago-aquatica"
image_width = 300px
regnum = Plantae
divisio = Magnoliophyta
classis = Liliopsida
ordo = Alismatales
ordo_authority = Dumort.
subdivision_ranks = Families
subdivision = See text

Alismatales is an order of flowering plants. The order will of necessity contain the family Alismataceae.

Taxonomy

The APG II system, of 2003 (unchanged from the APG system, of 1998) assigns the order to the clade monocots and uses this circumscription:
* order Alismatales
*: family Alismataceae
*: family Aponogetonaceae
*: family Araceae
*: family Butomaceae
*: family Cymodoceaceae
*: family Hydrocharitaceae
*: family Juncaginaceae
*: family Limnocharitaceae
*: family Posidoniaceae
*: family Potamogetonaceae
*: family Ruppiaceae
*: family Scheuchzeriaceae
*: family Tofieldiaceae
*: family Zosteraceae

Thus circumscribed, the order contains about 165 genera in 14 families, with a cosmopolitan distribution. Most of the families are composed of herbaceous plants, commonly found in aquatic environments. The flowers are usually arranged in inflorescences, and the mature seeds lack endosperm.

The biggest departure from earlier systems (see below) is the inclusion of family Araceae. By its inclusion the order has grown enormously in number of species. The family Araceae alone accounts for about a hundred genera, totalling over two thousand species. The rest of families together contain just about five hundred species.

The Cronquist system of 1981 placed the order in subclass Alismatidae of class Liliopsida [= monocotyledons] and used this circumscription:
* order Alismatales
*: family Alismataceae
*: family Butomaceae
*: family LimnocharitaceaeThe Cronquist subclass Alismatidae conformed fairly closely to the order Alismatales as circumscribed by APG, minus the family Araceae.

The Dahlgren system placed the order in the superorder Alismatanae in the subclass Liliidae [= monocotyledons] in the class Magnoliopsida [= angiosperms] ; it used this circumscription:
* order Alismatales
*: family Alismataceae
*: family Aponogetonaceae
*: family Butomaceae
*: family Hydrocharitaceae
*: family LimnocharitaceaeThe Dahlgren superorder Alismatanae conformed fairly closely to the order Alismatales as circumscribed by APG, minus the family Araceae.

The Wettstein system, last version in 1935, and the Engler system, update in 1964, used the name Helobiae for the order.

References

*
* ISBN 0-87893-403-0.

External links

* [http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Undef&id=16360&lvl=3&lin=f&keep=1&srchmode=1&unlock NCBI Taxonomy Browser]


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • Alismatales — Alismatales …   Wikipédia en Français

  • Alismatales — ? Alismatales …   Wikipedia Español

  • Alismatales — Lemna trisulca …   Wikipédia en Français

  • Alismatales — ▪ plant order Introduction   arrowhead and pondweed order of flowering plants, belonging to the monocotyledon (monocot) group, whose species have a single seed leaf. Most of the some 4,500 species are aquatic and grow submersed or partially… …   Universalium

  • Alismatales — Froschlöffelartige Drachenwurz (Calla palustris) Systematik Unterreich: Gefäßpflanzen (Tracheobionta) …   Deutsch Wikipedia

  • Alismatales — Alismataceae Aponogetonaceae Araceae Butomaceae Cymodoceaceae Hydrocharitaceae Juncaginaceae Limnocharitaceae Posidoniaceae Potamogetonaceae Ruppiaceae Scheuchzeriaceae Tofieldiaceae Zosteraceae El orden Alismatales contiene alrededor de 165… …   Enciclopedia Universal

  • Alismatales — …   Википедия

  • alismatales — alis·ma·ta·les …   English syllables

  • alismatales — see alismales …   Useful english dictionary

  • Noms des ordres en APG II — Une liste de nom des ordres. Les noms gras sont les noms courantes en la classification APG II (2003). Les noms italiques ne sont pas assigné en APG II. Acanthales Lindl. (1833) = Lamiales Acerales Lindl. (1833) = Sapindales Acorales Reveal… …   Wikipédia en Français

Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.