Great thank you Alex!

For reference leaves were small averaging between 1.5-2cm in length. Upperside of leaves appeared to be glabrous and lowerside only sparsely hairy. Fruit 5 stoned.

Thanks Andrew!

Thanks Andy!

Thanks for the reply Sim.

Thanks for sharing Sim. Been to Fairlight Glen before but have never made it down to Covehurst Bay.

Thanks Ross. Seems to be a lot around at the moment.

When combined, both these features are larger than your typical Japanese but smaller than your giant knotweed. Therefore this plant is most likely to be the hybrid Bohemian knotweed. #invasiveinsects #invasiveplants (4/4)

The Bohemian knotweed in these photos has a mixture of the squared leaf bases of Japanese and the cordate leaf bases of giant knotweed. The size of the plant and its leaves are also characteristic, the plant is around 3.5m tall and the some of the leaves are larger than 17cm. (3/4)

In this instance, the species of knotweed is not Japanese knotweed (Reynoutria japonica) but is actually Bohemian knotweed (Reynoutria x bohemica) the hybrid between giant knotweed (Reynoutria sachalinensis) and Japanese knotweed as it has features intermediate of both parents. (2/4)

Thanks for having a look Alex. Yes the first picture is the primocane.

More photos (2/2).