Perennial weeds
From Allotments4All
General characterisitics
Grow for several seasons from strong underground roots and can regrow from any small segments of root that have been separated from the main plant. Because of this feature perennial weeds cannot be easily composted or chopped up and left in the ground (the more you chop em, the more you make).
list of types
Bellbind Bindweed Bracken Ground elder Horsetail Dandelion Creeping thistle