A Polygonaceae, or even a Knotweed Personal, come the class action of dicots including buckwheat, sorrel (but not wood sorrel), rhubarb, and knotgrass. These are known as for the shape of the seed; that of rhubarb, for instance, has the triangular cross-division.

In the Cronquist system, the Polygonaceae were given their have sequentially, however newly systems address the babies when a share of the Caryophyllales.

Numbers of knotweeds use ocreas at their stems' nodes. Ocreas occurs as sheath developed from either stipules at a attaching leaves' bases. A bit of ocreas develop mildly hirsute fringes.

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 or Knotweed Pteropyrum Pterostegia Rheum Rumex Ruprechtia Stenogonum Symmeria Systenotheca Triplaris