polygonum aviculare common knotgrass, prostrate knotweed, birdweed, pigweed, lowgrass green leaves growing through cracks

abandoned abstract aged aging aviculare background birdweed broken close color common crack cracks damaged desert design destruction detail dirty dry grass gray green grey ground growing grunge invasion knotgrass knotweed leaves lowgrass material natural nature neglected old organic overgrown pattern pavement pigweed plant polygonum prostrate rain road rough sand sidewalk steppe stone street structure surface texture weathered white worn young