Triuridales is a botanical name of an order of flowering plants. A well-known system that used this name is the Cronquist system (1981), with this circumscription: A botanical name is a formal name conforming to the ICBN. As with its zoological and bacterial equivalents it may also be called a scientific name. Botanical names may be in one part (genus and above), two parts (species) or three parts (below the rank of species). ... The Cronquist system is a scheme for the classification of flowering plants (or angiosperms). ...
By habit, these plants were quite out of place in the subclass Alismatidae, where Cronquist placed this order. The APG II system, used here, leaves the first of these two families unassigned in the clade monocots while the second is moved to order Pandanales. Genera Japonolirion Petrosavia Petrosaviaceae are family of flowering plants. ... Genera See text Triuridaceae is a family of flowering plants, consisting of six genera with about 80 species. ... In the Cronquist system, Alismatidae is a subclass of plant in the class Liliopsida. ... A modern system of plant taxonomy, the APG II system of plant classification was published in 2003 by the Angiosperm Phylogeny Group, APG, in Angiosperm Phylogeny Group (2003). ... Orders Base Monocots: Acorus Alismatales Asparagales Dioscoreales Liliales Pandanales Family Petrosaviaceae Commelinids: Arecales Commelinales Poales Zingiberales Family Dasypogonaceae Monocotyledons or monocots are a group of flowering plants usually ranked as a class and once called the Monocotyledoneae. ... Families Cyclanthaceae Pandanaceae Stemonaceae Triuridaceae Velloziaceae The Pandanales are an order of flowering plants. ...
They can scarcely be on the main line of evolution of the class, however, because a primitive monocot should have binucleate pollen and endospermous seeds.
The anomalous small order Triuridales does have endospermous seeds, but the mycotrophic, nongreen habit of this group sets it well apart from any possible mainstream of monocot evolution.
The Alismatidae are here considered to be a near-basal side branch of the monocots, a relictual group that has retained a number of primitive characteristics.
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