Alismatidae

The Alismatidae is the group of angiosperm plants, which in Heywood's classification includes four orders with 16 families.

• Alismatales Order
  • Butomaceae
  • Limnocharitaceae
  • Alismataceae
• Hydrocharital Order
  • Hydrocharitaceae
• Order Najadales
  • Aponogetonaceae
  • Scheuchzeriaceae
  • Juncaginaceae
  • Potamogetonaceae
  • Ruppiaceae
  • Najadaceae
  • Zannichelliaceae
  • Posidoniaceae
  • Cymodoceaceae
  • Zosteraceae
• Order Triuridales
  • Petrosaviaceae
  • Triuridaceae

Alismatidae in the Takhtajan system

The Takhtajan system treats them as one of six subclasses in the class Liliopsida (=monocots). It consists of:

• subclass Alismatidae

  superorden Alismatanae

  order Butomales

  order Hydrocharitals

  order Najadales

  order Alismatales

  order Aponogetonales

  order Juncaginales

  order Potamogetonales

  order Posidoniales

  order Cymodoceales

  order Zosterales

Alismatidae in the Cronquist system

The Cronquist system treats them as one of four subclasses in the class Liliopsida (=monocots). Consists of (1981):

• subclass Alismatidae

  order Alismatales

  order Hydrocharitals

  order Najadales

  order Triuridales

This subclass comprises fewer than five hundred species in all: many of them are aquatic or semi-aquatic (see Information on Alismatidae).

APG II System

The APG II system does not use formal botanical names above the order rank; and assigns many of the plants in the (expanded) order Alismatales, in the clade 'monocots', although the species in the Cronquist order Triuridales are assigned to almost different places.