Fo-Ti Root (Polygonum multiflorum) is a species of flowering plant in the buckwheat family Polygonaceae. Fo-Ti is an herbaceous perennial vine growing to 2–4 m tall from a woody tuber. The leaves are 3–7 cm long and 2–5 cm broad, broad arrowhead-shaped, with an entire margin. The flowers are 6–7 mm diameter, white or greenish-white, produced on short, dense panicles up to 10–20 cm long in summer to mid-autumn. The fruit is an achene 2.5–3 mm long.