The sundew is a carnivorous plant which grows widely in the heaths and boggy areas of Europe, South America and U.S., China, and India. Insects are attracted by the long, red hairs on the leaves of the plant. glands on the surface of the leaves then secrete a fluid which traps and breaks down the insect, digesting it. The juice of the plant is caustic, affecting the respiratory system, and when eaten by sheep, leads to a harsh, spasmodic cough. It was used in the Middle Ages to treat the plague, and 16th-Century physicians used it for tuberculosis. Homeopathically, it was “proved” by Hahnemann, and the whole fresh plant is used, mainly to treat coughs.