Fallopia japonica - Japanese Knotweed
Location: Budapest/Római Part on the bank of the River Danube. Japanese knotweed is a large herbaceous perennial thats capable of reaching heights of up to 2 meters and commonly forms itself in dense stands.
The white flowers grow in panicles that grow from the plant's axils, these grow up to 10cm long.
It has large heart shaped leaves 10-12 cm long with a pointed tip at the end. The small brown spots have been caused by burrowing insects.
The fruit is found in the centre of papery thin wings that are easily carried in the wind.
The stout stems are green with red tints in them; they form a zigzagged shape that changes its direction at every leaf base.
