Knotgrass
Knotweed
Polygonum aviculare ssp. microspermum
Polygonum aviculare ssp. neglectum
Polygonum aviculare ssp. rurivagum
Polygonum cuspidatum
Polygonum filiforme
Polygonum raii ssp. norvegicum
Polygonum raii ssp. raii
Polygonum scoparium
Rays Knotgrass