About 130 species of annuals and perennials with tap roots, fibrous roots or rhizomes. Plants origins are widely distributed. A number of members of this genus are weedy and invasive, although there are some standout members.
Name Derivation: Medieval name referring to the likeness of the leaves to a peach tree
Common Name: Knotweed, Smartweed
Persicaria is in the family Polygonaceae.