I have an unidentified climbing plant (probably a weed) in my garden which has been there for about three years.
It is a perennial which has a very long, pointed and quite thick white tap root, a bit like a long parsnip, but thinner. It also has tendrils.
This year a second one appeared in a nearby, more open, part of the garden. It was growing at the woody base of a Lavatera which had died during last winter, both of which I have now dug up.
The original plant is growing under a tree, so it is growing in the shade. It is vigorous and in one season it grows up to about 10ft but it then dies down in winter. The leaves have 5 pointed lobes and are attached to the main stem on stalks. I cannot remember it flowering, but if it does they must be insignificant.
I would be grateful to anyone who can identify it. Once I know what it is I can decide whether or not to remove it. I quite like it as the leaves are a nice shape and their colour contrasts well to the surrounding leaves and the burgundy coloured leaves of the ornamental plum tree which it is growing through.