Alismatidae
Encyclopedia
Alismatidae is a botanical name
at the rank of subclass. Circumscription of the subclass will vary with the taxonomic system being used (there are many such systems); the only requirement being that it includes the family Alismataceae
. It is a relatively new name: earlier systems, such as the Engler
and Wettstein system
s, used the name Helobiae
for a comparable unit.
treats this as one of six subclasses within the class Liliopsida
(=monocotyledons). It consists of:
treats this as one of four subclasses within the class Liliopsida
(=monocotyledons). It consists of (1981):
This subclass comprises less than five hundred species total: many of these are aquatic
or semiaquatic plants (see
Alismatidae info).
does not use formal botanical names above the rank of order; it assigns most of the plants involved to the (expanded) order Alismatales
, in the clade 'monocots', although the plants in Cronquist's order Triuridales
are assigned to quite different placements.
Botanical name
A botanical name is a formal scientific name conforming to the International Code of Botanical Nomenclature and, if it concerns a plant cultigen, the additional cultivar and/or Group epithets must conform to the International Code of Nomenclature for Cultivated Plants...
at the rank of subclass. Circumscription of the subclass will vary with the taxonomic system being used (there are many such systems); the only requirement being that it includes the family Alismataceae
Alismataceae
The water-plantains are a family of flowering plants, comprising 11 genera and between 85-95 species. The family has a cosmopolitan distribution, with the greatest number of species in temperate regions of the Northern Hemisphere...
. It is a relatively new name: earlier systems, such as the Engler
Engler system
One of the prime systems of plant taxonomy, the Engler system was devised by Adolf Engler.According to Engler, Syllabus der Pflanzenfamilien the main groups of plants are:* I. divisio Schizophyta* II. divisio Phytosarcodina...
and Wettstein system
Wettstein system
A system of plant taxonomy, the Wettstein system recognised the following main groups, according to* I. phylum Schizophyta*::: 1. classis Schizophyceae*::: 2. classis Schizomycetes* II. phylum Monadophyta* III. phylum Myxophyta...
s, used the name Helobiae
Helobiae
Helobiae is a botanical name, and is no longer valid. It was used in the Engler and Wettsteins systems of plant taxonomy for an order of flowering plants; in the latter system it had this circumscription:* order Helobiae*: family Alismataceae...
for a comparable unit.
Alismatidae in the Takhtajan system
The Takhtajan systemTakhtajan system
A system of plant taxonomy, the Takhtajan system of plant classification was published by Armen Takhtajan, in several versions from the 1950s onwards. It is usually compared to the Cronquist system. Key publications:-External links:* Takhtajan system at...
treats this as one of six subclasses within the class Liliopsida
Liliopsida
Liliopsida is a botanical name for the class containing the family Liliaceae . It is considered synonymous with the name monocotyledon. Publication of the name is credited to Scopoli : see author citation...
(=monocotyledons). It consists of:
- subclass Alismatidae
- superorder Alismatanae
- order Butomales
- order HydrocharitalesHydrocharitalesHydrocharitales is a botanical name of an order of flowering plants. A well-known system that used this name is the Cronquist system , for an order in subclass Alismatidae, with this circumscription:* order Hydrocharitales*: family Hydrocharitaceae...
- order NajadalesNajadalesNajadales is a botanical name of an order of flowering plants. A well-known system that used this name is the Cronquist system , that used this name for an order in subclass Alismatidae with this circumscription:* order Najadales...
- order AlismatalesAlismatalesAlismatales is an order of flowering plants including about 2500 species. Pleants assigned to this order are mostly tropical or aquatic.-Description:...
- order Aponogetonales
- order Juncaginales
- order Potamogetonales
- order Posidoniales
- order Cymodoceales
- order Zosterales
- superorder Alismatanae
Alismatidae in the Cronquist system
The Cronquist systemCronquist system
The Cronquist system is a taxonomic classification system of flowering plants. It was developed by Arthur Cronquist in his texts An Integrated System of Classification of Flowering Plants and The Evolution and Classification of Flowering Plants .Cronquist's system places flowering plants into two...
treats this as one of four subclasses within the class Liliopsida
Liliopsida
Liliopsida is a botanical name for the class containing the family Liliaceae . It is considered synonymous with the name monocotyledon. Publication of the name is credited to Scopoli : see author citation...
(=monocotyledons). It consists of (1981):
- subclass Alismatidae
- order AlismatalesAlismatalesAlismatales is an order of flowering plants including about 2500 species. Pleants assigned to this order are mostly tropical or aquatic.-Description:...
- order HydrocharitalesHydrocharitalesHydrocharitales is a botanical name of an order of flowering plants. A well-known system that used this name is the Cronquist system , for an order in subclass Alismatidae, with this circumscription:* order Hydrocharitales*: family Hydrocharitaceae...
- order NajadalesNajadalesNajadales is a botanical name of an order of flowering plants. A well-known system that used this name is the Cronquist system , that used this name for an order in subclass Alismatidae with this circumscription:* order Najadales...
- order TriuridalesTriuridalesTriuridales was an order of flower plants that was used in the well-known Cronquist system, in the subclass Alismatidae, with this circumscription:* order Triuridales*: family Petrosaviaceae*: family Triuridaceae...
- order Alismatales
This subclass comprises less than five hundred species total: many of these are aquatic
Aquatic plant
Aquatic plants are plants that have adapted to living in aquatic environments. They are also referred to as hydrophytes or aquatic macrophytes. These plants require special adaptations for living submerged in water, or at the water's surface. Aquatic plants can only grow in water or in soil that is...
or semiaquatic plants (see
Alismatidae info).
APG II system
The APG II systemAPG II system
The APG II system of plant classification is the second, now obsolete, version of a modern, mostly molecular-based, system of plant taxonomy that was published in April 2003 by the Angiosperm Phylogeny Group. It was a revision of the first APG system, published in 1998, and was superseded in 2009...
does not use formal botanical names above the rank of order; it assigns most of the plants involved to the (expanded) order Alismatales
Alismatales
Alismatales is an order of flowering plants including about 2500 species. Pleants assigned to this order are mostly tropical or aquatic.-Description:...
, in the clade 'monocots', although the plants in Cronquist's order Triuridales
Triuridales
Triuridales was an order of flower plants that was used in the well-known Cronquist system, in the subclass Alismatidae, with this circumscription:* order Triuridales*: family Petrosaviaceae*: family Triuridaceae...
are assigned to quite different placements.