Asteridae

2024-12-27T02:54:17Z

2601:642:4682:E9B0:65FA:E75B:7B9A:8D83:

{{short description|Subclass of plants}}
{{not to be confused with|Asteriidae}}
'''''Asteridae''''' is an obsolete [[botanical name]] at the rank of [[Subclass (biology)|subclass]]. Composition of the subclass has also varied; however, by definition it always includes the family [[Asteraceae]] (Compositae). In the modern [[APG IV system]] of classification, [[asterid]] and [[euasterid]] are names for clades with a composition similar to that of Asteridae.

One of the better-known and more influential systems that formally recognized subclass Asteridae was the [[Cronquist system]] devised by botanist [[Arthur Cronquist]], which included the orders:

* [[Gentianales]]
* [[Solanales]]
* [[Lamiales]]
* [[Callitrichales]]
* [[Plantaginales]]
* [[Scrophulariales]]
* [[Campanulales]]
* [[Rubiales (plant)|Rubiales]]
* [[Dipsacales]]
* [[Calycerales]]
* [[Asterales]]

Most of the above orders as defined by Cronquist have definitely been dramatically redefined on the basis of recent molecular systematic studies.

To a large extent Cronquist's subclass Asteridae corresponds with the older concepts of [[Sympetalae]] and [[Tubiflorae]], groups that were defined by having their petals united into a tube. However, these older classifications contained some sympetalous families, such as [[Cucurbitaceae]], that are now known not to be closely related. Cronquist's concept also corresponds closely with the [[APG II]] group of [[euasterids]] but the APG does not formally recognize a group called "Asteridae" (or any other group above the rank of order).

Recent phylogenetic studies have suggested that several families, including three major orders not included in Asteridae by Cronquist, [[Ericales]], [[Cornales]], and [[Apiales]], also belong to the asterid group. The circumscription of subclass Asteridae, as well as the circumscriptions of the orders contained within it, is currently in a state of flux; many systematic botanists refer to these as clades ([[asterids]], [[euasterids]], etc.), rather than use formal names such as subclass Asteridae.

==External links==
*[http://www.csdl.tamu.edu/FLORA/newgate/cron1ast.htm Asteridae] {{Webarchive|url=https://web.archive.org/web/20080516215931/http://www.csdl.tamu.edu/FLORA/newgate/cron1ast.htm |date=2008-05-16 }} (Cronquist system)
*[http://tolweb.org/tree?group=Asterids&contgroup=Core_Eudicots Asterids]
*[http://hengduan.huh.harvard.edu/~rree/reprints/Donoghue_et_al-1998-TPS.pdf Phylogeny and the evolution of flower symmetry in the Asteridae]
*[http://www.ingentaconnect.com/search/expand?pub=infobike://ap/fy/2000/00000016/00000001/art00769&unc= The Phylogeny of the Asteridae sensu lato Based on Chloroplast ndhF Gene Sequences] (link to abstract)
*[http://www.springerlink.com/(lmk1zcqhf3qoezridttpvqvk)/app/home/contribution.asp?referrer=parent&backto=issue,5,7;journal,87,1500;linkingpublicationresults,1:104878,1 Phylogeny of the Asteridae s. str. based on rbcL sequences, with particular reference to the Dipsacales]{{Dead link|date=February 2020 |bot=InternetArchiveBot |fix-attempted=yes }} (link to abstract)

[[Category:Historically recognized angiosperm taxa]]
[[no:Kurvplanter]]
[[pl:Astrowe]]

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Asteridae