Species of knotweed
Japanese knotweed (Fallopia Japonica)
Giant knotweed (Fallopia sachalinensis)
Bohemica (Fallopia x bohemica)
Dwarf Japanese knotweed (Fallopia japonica var. Compacta)
Himalyan knotweed (Persicaria wallichii)
Lesser knotweed (Persicaria campanulata)
Two species that are not knotweeds but can sometimes be mistaken for one by the inexperienced, due to their similar leaf shapes and voracious growing habits, are: