I know of a European biologist, well-trained, who ate a salad of comfrey that contained a few leaves of self-seeded foxglove that was mixed in with the patch of comfrey.
Summary: TEHRAN (FNA)- Researchers revealed that digoxin, the active ingredient in the poisonous plant Foxglove, can enhance the body's own protective mechanism against high blood pressure and heart failure.
The foxglove, under such guises as lady's fingers, dead men's bellows, granny bonnets, witch's thimble, and a host of other fanciful names, has attracted the interest of mankind for centuries.