Land Plants - invasive

Japanese Knotweed (Fallopia japonica) on Aug 19, 2009

Submitter does not have a specimen

Description of specimen

Tall stems (8 - 10 feet) along the fenceline, stems about a foot high coming up in the grass at the nearest house. I assume this is coming back through from before these townhomes were built, as it does not seem to have been deliberately planted here.