Both Pachysandra the evergreen perennials and Polygonum also known as knotweed are what types of these plants?
Pachysandra: Pachysandra is a genus of five species of evergreen perennials or subshrubs, belonging to the boxwood family Buxaceae. Pachysandra:  The small uni-sexual blooms are greenish-white and produced in late spring or early summer. Polygonum: Polygonum is a genus of about 220 species of flowering plant in the buckwheat and knotweed family Polygonaceae. Polygonum:  Common names include knotweed, knotgrass, bistort, tearthumb, mile-a-minute, smartweed and several others.
flowering plant