The bindweed family comprises of several varieties seen as wild flowers in the UK together with some other species including convolvulus and polygonum. They can be a nuisance in the garden with brittle roots that make them hard to eliminate.
BEST LEFT IN THE WILD!
Field bindweed (Convolvulus arvensis)
Calystegia soldanella – Sea bindweed pink flowers with white stripe may-Aug
Calystegia sepium – Hedge bindweed or Bellbine, Rutland Beauty, Hedge False Bindweed, Wild Morning Glory with white funnel shaped flowers June-Sept
Calystegia silvatica – Large bindweed with white or pink striped flowers
Black bindweed is part of the dock family Polygonum convolvulus few flowers in pale green
Convolvulus arvensis – Field bindweed