We have a persitant weed that winds it self around several trees and bushes in our garden. It will climb as high as you like.
I have tried to trace it back to its source, have manages to eradicate a lot of it. But it seems to spead every where, under the earth or grass.
The root is a creamy white colour and is very healthy! At the surface and above ground its quite thin and wraps around anything vertical. Below ground if I try and pull it out it snaps easily and seems to be well established.