knot weed

Stand of Japanese knotweed Reynoutria japonica Fallopia japonica showing thicket of stems and foliage

Japanese knotweed Fallopia japonica habit drawing showing thicket of the plant

Japanese knotweed Fallopia japonica and Himalayan balsam Impatiens grandiflora seedling comparison

Japanese knotweed Fallopia japonica seedling showing rounded leaves and pink stem

Himalalyan knotweed Persicaria wallichii showing a plant and close up of one flower.

Giant knotweed Fallopia sachalinensis showing numerous drooping flowers, large leaves, stem section and detail of the orange underground rhizome

Japanese Knotweed Fallopia japonica without roots.  Illustration shows details of the small white flowers and winged seed.

Japanese Knotweed Fallopia japonica plant including roots underground

Pollinators bee ant hoverfly on Japanese knotweed Fallopia japonica

Japanese Knotweed Fallopia japonica Sketchbook study