Ragwort

In their experiments, the researchers grew ragwort plants in a greenhouse and then left the plants open to threatening insects, such as leaf-eating caterpillars or root-feeding beetle larvae.

Ragwort is under the command of dame Venus, and cleanses, digests and discusses.

Sea-poppies and ragwort were plants of ill-fame, too.

As we all know, witches ride through the air on a broom, but sometimes their means of locomotion was a bulrush, a branch of thorn, mullein stalks, cornstalk, or ragweed, called fairies' horse in Ireland.