I found these plants next to a stream in NorthWest Washington
state. The pictures were taken in Spring, and the plants were
getting to somewhere around 6-7 feet tall at the time. The
shorter shoots were all coiled up. Any idea what this could be?
IMG_1837.jpg IMG_1836.jpg IMG_1834.jpg It looks like the cursed
Japanese knotweed. Fallopia japonica. It was introduced to
Britain by the Victorians, cos it had pretty flowers. Now it is
everywhere! It will even grow up through tarmac and concrete.It
is a very invasive pest. Quote from wiki....." It is listed by
the World Conservation Union as one of the world's 100 worst
invasive species." However, in Japan it is not a problem as
there are natural predators there. japanese knotweed - Google
Search Last edited by Silver surfer; 08-24-2010 at 08:10 AM.