Dioscoreales
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| Image:Tamus communis02.jpg Dioscorea communis
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Dioscoreales is a botanical name for an order of flowering plants. Of necessity it contains the family Dioscoreaceae.
The APG II system, of 2003, places this order in the clade monocots and uses this circumscription:
- order Dioscoreales
- family Burmanniaceae
- family Dioscoreaceae
- family Nartheciaceae
The APG system, of 1998, also placed the order in the clade monocots with this circumscription:
- order Dioscoreales
- family Burmanniaceae
- family Dioscoreaceae
- family Taccaceae
- family Thismiaceae
- family Trichopodaceae
In APG II the family Thismiaceae has been included in family Burmanniaceae and the families Taccaceae and Trichopodaceae have been included in family Dioscoreaceae. Therefore the change is not as large as might appear, and the only plants to have moved across the borders of the order are those belonging to family Nartheciaceae.
The Cronquist system, of 1981, did not recognise such an order, but placed most such plants in order Liliales in subclass Liliidae in class Liliopsida [=monocotyledons] of division Magnoliophyta [=angiosperms].
The Dahlgren system placed the order in superorder Lilianae in subclass Liliidae [=monocotyledons] of class Magnoliopsida [=angiosperms] and used this circumscription:
- order Dioscoreales
- family Dioscoreaceae
- family Petermanniaceae
- family Rhipogonaceae
- family Smilacaceae
- family Stemonaceae
- family Taccaceae
- family Trichopodaceae
- family Trilliaceae
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