Black-bindweed is a scrambling or twining plant of arable and waste ground.
It has small greenish-white or greenish-pink flowers.
It is similar to Copse-bindweed, but is much more common. The main differences are in the seeds: those of Copse-bindweed are shiny, whereas those of Black-bindweed are dull.
Seeds from Copse-bindweed (on the left, shiny) and Black-bindweed (on the right, dull)