Viscum is a genus of about 70–100 species of mistletoes, native to temperate and tropical regions of Europe, Africa, Asia and Australasia.
These are semi-parasitic plants that grow on coniferous and deciduous trees and use suction cups to extract water and mineral salts from them.
Viscum species are poisonous to humans; eating the fruit causes a weak pulse and acute gastrointestinal problems including stomach pain and diarrhea.