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Najadales is a
botanical nameA 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...
of an order of flowering plants. A well-known system that used this name is the
Cronquist systemThe 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...
(1981), that used this name for an order in subclass
AlismatidaeAlismatidae is a botanical name at the rank of subclass. Circumscription of the subclass will vary with the taxonomic system being used ; the only requirement being that it includes the family Alismataceae...
with this circumscription:
- order Najadales
- family Aponogetonaceae
The Aponogetonaceae are a family of flowering plants in the order Alismatales.In recent decades the family has had universal recognition by taxonomists. The APG system and APG II system treat it in the order Alismatales in the clade monocots...
- family Scheuchzeriaceae
Scheuchzeria palustris , is a flowering plant, the only species in the genus Scheuchzeria, itself the only genus in the family Scheuchzeriaceae...
- family Juncaginaceae
Juncaginaceae is the botanical name of a family of flowering plants, recognized by most taxonomists for the past few decades. It is also known as the Arrowgrass family....
- family Potamogetonaceae
The Potamogetonaceae, commonly referred to as the pondweed family, is an aquatic family of monocotyledonous flowering plants. There are roughly 120 species spread across six genera in the Potamagetonaceae...
- family Ruppiaceae
Ruppia, also known as the ditch grasses, is the only genus in the family Ruppiaceae. Such a family has been recognized by relatively few taxonomists...
- family Najadaceae
- family Zannichelliaceae
- family Posidoniaceae
- family Cymodoceaceae
- family Zosteraceae
Zosteraceae is a family of marine perennial flowering plants found in temperate and subtropical coastal waters, with the highest diversity located around Korea and Japan. Most seagrasses complete their entire life cycle under water, having filamentous pollen especially adapted to dispersion in an...
The
APG II systemThe 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...
, used here, assigns the plants involved to the expanded order
AlismatalesAlismatales 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'.