Reynoutria multiflora (synonyms Fallopia multiflora and Polygonum multiflorum) is a species of flowering plant in the buckwheat family Polygonaceae. It is known as tuber fleeceflower and Chinese knotweed. It is native to central and southern China.
Reynoutria multiflora is a herbaceous perennial vine growing to 2–4 m (6 ft 7 in–13 ft 1 in) tall from a woody tuber. The leaves are 3–7 cm (1.2–2.8 in) long and 2–5 cm (0.79–1.97 in) broad, broad arrowhead-shaped, with an entire margin. The flowers are ...