Prostrate Knotweed
Polygonum aviculare Linnaeus
Prostrate Knotweed: https://marylandbiodiversity.com/species/3538
Synonyms
Polygonum arenastrum  Polygonum articulata  Polygonum aviculare ssp. bellardii  Polygonum aviculare ssp. depressum  Polygonum bellardii 
Flowers
None
Fruits or Seeds
Green Leaves
Colored Leaves