Polygonum aviculare L.

Locations ofPolygonum aviculare L. in Virginia

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Detail

Family
Polygonaceae
Botanical Name
Polygonum aviculare L.
Common Name
Prostrate Knotweed, Knotgrass
Synonym(s)
Polygonum arenastrum Boreau; Polygonum buxiforme Small; Polygonum monspeliense Pers.
Flora of Virginia Name/Status
Polygonum aviculare L.
Comments
An assemblage of predominantly selfing annuals, more complex than previously thought with both tetraploid and hexaploids conditions found among both subspecies. FNA attributes four subspecies to Virginia: ssp. aviculare, ssp. depressum (Meisner) Arcangeli, ssp. neglectum (Besser) Arcangeli, and ssp. buxiforme (Small) Costea & Tardif. Individual maps for infraspecific taxa seem impractical for this already controversial complex.
Habitat
Weedy fields, roadsides, lawns, and cultivated soil. Common throughout.
Native Status
Introduced

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