All Topics  
Trochodendraceae

 
Trochodendraceae

 
   Email Print
   Bookmark   Link
 

 

Trochodendraceae
 
 
  Topics Trochodendraceae Topic Home

Trochodendraceae is the botanical name
Botanical name

A botanical name is a formal scientific name conforming to the International Code of Botanical Nomenclature and, if the plant is a cultigen, the additional cultivar and/or Group epithets must conform to the International Code of Nomenclature for Cultivated Plants....
 for a family
Family (biology)

In biological classification, family is a taxonomic rank. Exact details of formal nomenclature depend on the Nomenclature Codes which applies....
 of flowering plants.

The APG II system
APG II system

A modern list of systems of plant taxonomy, the APG II system of plant classification was published in 2003 by the Angiosperm Phylogeny Group, APG, in...
, of 2003 (unchanged from the APG system
APG system

A modern list of systems of plant taxonomy, the APG system of plant classification was published in 1998 by the Angiosperm Phylogeny Group. The system is unusual in being based, not on total evidence, but on the cladistics analysis of the DNA sequences of three genes, two chloroplast genes and one gene coding for ribosomes....
, of 1998), also recognizes this family: it is unplaced as to order and left among the basal lineages of the eudicots
Eudicots

Eudicots and Eudicotyledons are terms introduced by Doyle & Hotton to refer to a group of flowering plants that had been called "tricolpates" or "non-Magnoliid dicots" by previous authors....
. As the default option, APG (in both versions of the system) accepts this as a family of two species, both trees, but it does allow the option of segregating family Tetracentraceae
Tetracentraceae

Tetracentraceae is the botanical name for a family of flowering plants. Such a family has been recognized by many taxonomists.The APG II system, of 2003 , does not formally use this family; it assumes the plants involved to belong to family Trochodendraceae....
, as an optional segregate.

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






Discussion
Ask a question about 'Trochodendraceae'
Start a new discussion about 'Trochodendraceae'
Answer questions from other users
Full Discussion Forum



Encyclopedia


Trochodendraceae is the botanical name
Botanical name

A botanical name is a formal scientific name conforming to the International Code of Botanical Nomenclature and, if the plant is a cultigen, the additional cultivar and/or Group epithets must conform to the International Code of Nomenclature for Cultivated Plants....
 for a family
Family (biology)

In biological classification, family is a taxonomic rank. Exact details of formal nomenclature depend on the Nomenclature Codes which applies....
 of flowering plants.

The APG II system
APG II system

A modern list of systems of plant taxonomy, the APG II system of plant classification was published in 2003 by the Angiosperm Phylogeny Group, APG, in...
, of 2003 (unchanged from the APG system
APG system

A modern list of systems of plant taxonomy, the APG system of plant classification was published in 1998 by the Angiosperm Phylogeny Group. The system is unusual in being based, not on total evidence, but on the cladistics analysis of the DNA sequences of three genes, two chloroplast genes and one gene coding for ribosomes....
, of 1998), also recognizes this family: it is unplaced as to order and left among the basal lineages of the eudicots
Eudicots

Eudicots and Eudicotyledons are terms introduced by Doyle & Hotton to refer to a group of flowering plants that had been called "tricolpates" or "non-Magnoliid dicots" by previous authors....
. As the default option, APG (in both versions of the system) accepts this as a family of two species, both trees, but it does allow the option of segregating family Tetracentraceae
Tetracentraceae

Tetracentraceae is the botanical name for a family of flowering plants. Such a family has been recognized by many taxonomists.The APG II system, of 2003 , does not formally use this family; it assumes the plants involved to belong to family Trochodendraceae....
, as an optional segregate.

This segregation would lead to two families of each one species, of trees: Tetracentraceae with Tetracentron sinense and Trochodendraceae with Trochodendron aralioides. These two 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 always attracted taxonomic attention.

The Cronquist system
Cronquist system

A list of systems of plant taxonomy, the Cronquist system is a scheme for the classification of flowering plants . This system was developed by Arthur Cronquist in his texts An Integrated System of Classification of Flowering Plants and The Evolution and Classification of Flowering Plants ....
, of 1981, accepted both families and placed these in the order Trochodendrales
Trochodendrales

Trochodendrales is a botanical name for an order of flowering plants. An order by this name was recognised in the Cronquist system, as comprising the families Tetracentraceae and Trochodendraceae, each consisting of a single species....
, in subclass Hamamelidae, in class Magnoliopsida
Magnoliopsida

Magnoliopsida is a valid botanical name for a class of flowering plants. By definition the class will include the family Magnoliaceae, but its wiktionary:circumscription can otherwise vary, being more inclusive or less inclusive depending upon the classification system being discussed....
.

The Dahlgren system
Dahlgren system

One of the modern list of systems of plant taxonomy, the Dahlgren system was published by monocotyledons specialist Rolf Martin Theodor Dahlgren....
 made the same choice at the rank of family and order, but placed this order in superorder Rosanae in subclass Magnoliidae
Magnoliidae

Magnoliidae are a group of about 9,000 species of flowering plants, including magnolias, nutmeg, bay laurel, cinnamon, avocado, black pepper, and many others....
.

The Engler system
Engler system

One of the prime list of systems of plant taxonomy, the Engler system was devised by Adolf Engler.According to Engler, Syllabus der Pflanzenfamilien the main groups of plants are:...
, in its update of 1964, placed both families in a rather large order Magnoliales
Magnoliales

Magnoliales is an order of flowering plants....
, in subclass Archychlamydeae in class Dicotyledoneae.

The Wettstein system
Wettstein system

A list of systems of plant taxonomy, the Wettstein system recognised the following main groups, according to* I. phylum Schizophyta*::: 1....
, last updated in 1935, united the two species in family Trochodendraceae which was placed in order Polycarpicae (the predecessor of order Magnoliales), in subclass Choripetalae, in class Dicotyledones.

External links

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