Solamum Dulcamara

Commonly known as Woody Nightshade or Bittersweet. It is usually found in hedgerows and shaded. Its active constituent is Solamine which acts narcotically and in large doses causes paralysis.

It slows the heart and respiration, reduces temperature and causes vertigo and delirium, eventually convulsions and death.

Woody Nightshade was used widely for a number of ailments including rheumatism, fever, inflammation and jaundice. 

It was believed to guard against the evil eye and has been revered for thousands of years (a necklace of the berries was found in Tutenkahmun's tomb).