Noun
a family of plants of order Polygonales chiefly of the north temperate zone; includes the buckwheats
Source: WordNetThe Polygonaceae are a family of flowering plants known informally as the knotweed family or smartweed—buckwheat family in the United States. Source: Internet
Phylogeny The following phylogenetic tree is based on two papers on the molecular phylogenetics of Polygonaceae. Source: Internet
Its circumscription was typically: * order Polygonales *: family Polygonaceae In these systems the order is placed close to the order Caryophyllales (or its predecessor Centrospermae ). Source: Internet