Identification Identification of Japanese knotweed may be confused with other plants suspected of being knotweed, due often to the similar appearance of leaves and stems. Dogwood, lilac, houttuynia (Houttuynia cordata), ornamental bistorts such as red bistort (Persicaria amplexicaulis), lesser knotweed (Koenigia campanulata), Himalayan balsam (Impatiens glandulifera), broad-leaved dock (Rumex obtusifolius), bindweed (Convolvulus arvensis), bamboo, Himalayan honeysuckle (Leycesteria formosa), and Russian vine (Fallopia baldschuanica) have been suspected of being Reynoutria japonica.
Identification Identification of Japanese knotweed may be confused with other plants suspected of being knotweed due often to the similar appearance of leaves and stems Dogwood lilac houttuynia (Houttuynia cordata) ornamental bistorts such as red bistort (Persicaria amplexicaulis) lesser knotweed (Koenigia campanulata) Himalayan balsam (Impatiens glandulifera) broad-leaved dock (Rumex obtusifolius) bindweed (Convolvulus arvensis) bamboo Himalayan honeysuckle (Leycesteria formosa) and Russian vine (Fallopia baldschuanica) have been suspected of being Reynoutria japonica