Notable projects include research into invasive plants including Japanese Knotweed, Giant Hogweed and Himalayan Balsam. Japanese Knotweed "Fallopia japonica" is an invasive species that threatens Jersey's biodiversity. Other common names for the plant include pale smartweed, curlytop knotweed, and willow weed. Japanese knotweed and Himalayan balsam are Asian plant species around the River Witham. It is also called prostrate knotweed, birdweed, pigweed and lowgrass. He also introduced Japanese knotweed ("Reynoutria japonica", syn. Rheum palmatum is a species of flowering plant in the knotweed family Polygonaceae. Common plants here include mountain sorrel, capitate sedge, mat muhly, Newberry knotweed, and red huckleberry. Persicaria is a genus of herbaceous flowering plants in the knotweed family, Polygonaceae. Japanese knotweed has a large underground network of roots (rhizomes). Instead, buckwheat is related to sorrel, knotweed, and rhubarb. It is known as tuber fleeceflower and Chinese knotweed. Japanese knotweed grows profusely in many nations. It is commonly known as Asian knotweed or Japanese knotweed.