Field bindweed is a low, twining, deep-rooted perennial vine in the morning-glory family, with arrowhead-shaped leaves and pretty funnel-shaped flowers that open white to soft pink. Do not be charmed: Plotwright lists it as a know-your-enemy entry, not a plant to grow. Convolvulus arvensis is one of the most difficult-to-eradicate weeds in the world. A single plant builds a perennial root and rhizome system that can reach more than 20 feet deep, regenerates from the smallest broken fragment, and seeds into a soil seed bank that stays viable for decades. It twines over and strangles crops, perennials, and shrubs, climbing anything it touches. It is listed as a noxious weed in many US states. Learn to recognize it, never plant it, and treat any patch as a long-term control problem. Its one honest virtue is that the flowers are an early and season-long nectar source for some bees.