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Trochodendraceae
Trochodendron aralioides
Scientific classification
Kingdom: Plantae
Division: Angiospermae
(unranked): Eudicots
Order: Trochodendrales
Family: Trochodendraceae
Eichler
Genera

Trochodendraceae is a family of flowering plants with two living genera found in southeast Asia. The two living species share the feature of secondary xylem without vessels, which is quite rare in angiosperms. As the vessel-free wood suggested primitiveness, these two species have attracted much taxonomic attention.

Classification

The current classification of Trochodendraceae is the APG III system published in October 2009. Unlike the APG and APG II systems, this system places the family in the order Trochodendrales and places Tetracentron synonymizing Tetracentraceae fully with Trochodenraceae.[1]

The APG II system, of 2003 retained the classification used in the 1998 APG system recognizing Trochodendraceae as a family. APG and APG II did not place the family in an order, leaving it among the basal lineages of the eudicots. Both APG systems accepts this as a family of two modern species, but it does allow the option of separating out the family Tetracentraceae.

This segregation would lead to two families with one species each: Tetracentraceae with Tetracentron sinense and Trochodendraceae with Trochodendron aralioides.

The Cronquist system, of 1981, accepted both Trochodendraceae and Tetracentraceae as families and placed these in the order Trochodendrales, in subclass Hamamelidae, in class Magnoliopsida.

References

  1. ^ Angiosperm Phylogeny Group (2009). An update of the Angiosperm Phylogeny Group classification for the orders and families of flowering plants: APG III. Botanical Journal of the Linnean Society 161: 105-121.

External links

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Wikispecies

Up to date as of January 23, 2010

From Wikispecies

Trochodendron aralioides

Taxonavigation

Classification System: APG II Classification System: APG II (down to family level)

Main Page
Cladus: Eukaryota
Regnum: Plantae
Cladus: Angiospermae
Cladus: Eudicots
Ordo: Unassigned Eudicots
Familia: Trochodendraceae
Genera: †Nordenskioldia - Tetracentron - Trochodendron - †Zizyphoides

Name

Trochodendraceae Prantl

Synonyms

Tetracentraceae Tieghem

References

  • Angiosperm phylogeny Website accessed 5/6/09
  • Crane P. R., Manchester, S. R., and Dilcher, D. L., 1991; "Reproductive and vegetative structure of Nordenskioldia (Trochodendraceae), a vesselless dicotyledon from the early Tertiary of the Northern Hemisphere." American Journal of Botany v. 78, p. 1311-1334

Vernacular names

Русский: Троходендровые

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