Building defects database - Conollyana

Record details

This is the rarest of knotweeds in the UK. It is another hybrid species, produced by the pollination of Japanese knotweed by a non-knotweed: Russian vine (Fallopia baldschuanica). It tends to be short-lived in the UK, though has been recorded more commonly in Europe. It has an elongated, pointed leaf with a straight back edge.