sun spurge, wartweed, wartwort, devil's milk, Euphorbia helioscopia(noun)

not unattractive European weed whose flowers turn toward the sun

wartwort(Noun)

Any of various plants, including the spurge and the nipplewort, formerly believed to cure warts.

Wartwort(noun)

a name given to several plants because they were thought to be a cure for warts, as a kind of spurge (Euphorbia Helioscopia), and the nipplewort (Lampsana communis)