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Polygonaceae

Polygonaceae
Scientific classification
Kingdom:Plantae
Division:Magnoliophyta
Class:Magnoliopsida
Order:Caryophyllales
Family: Polygonaceae
Genera
Afrobrunnichia
Antigonon
Aristocapsa
Atraphaxis
Brunnichia
Calligonum
Centrostegia
Chorizanthe
Coccoloba
Dedeckera
Dodecahema
Emex
Eriogonum
Fagopyrum
Fallopia
Gilmania
Goodmania
Gymnopodium
Harfordia
Hollisteria
Knorringia
Koenigia
Lastarriaea
Leptogonum
Muconea
Muehlenbeckia
Nemacaulis
Neomillspaughia
Oxygonum
Oxyria
Oxytheca
Parapteropyrum
Persicaria
Podopterus
Polygonella
Polygonum
Pteropyrum
Pterostegia
Rheum
Rumex
Ruprechtia
Stenogonum
Symmeria
Systenotheca
Triplaris
Ref: Families of Flowering Plants
as of 2002-11-15
The Polygonaceae, or the Knotweed Family, are a group of dicots including buckwheat, sorrel (but not wood sorrel), rhubarb, and knotgrass. It is named for the shape of the seed; that of rhubarb, for example, has a triangular cross-section. In the Cronquist system, the Polygonaceae were given their own order, but newer systems treat them as part of the Caryophyllales.