Synonyms for Devil's Milk (same or very similar meaning)
WordNet sense 1 (an Old World spurge introduced as a weed in the eastern United States):
petty spurge, Euphorbia peplusWordNet sense 2 (not unattractive European weed whose flowers turn toward the sun):
wartweed, wartwort, sun spurge, Euphorbia helioscopiaFrom the ODE community, based on WordNetadd/edit