The genus Circaea contains 7–10 species of flowering plants, known as Enchanter`s nightshade. They are woodland plants occurring throughout the temperate regions of the Northern Hemisphere. Two species are widespread, Broad-leaved Enchanter`s Nightshade (Circaea lutetiana) and Alpine Enchanter`s Nightshade (Circaea alpina). In addition, there...... Found on http://en.wikipedia.org/wiki/Circaea