Viscum is a genus of plants commonly known as mistletoe. These are hemiparasitic plants that grow on the branches or trunks of trees and shrubs, extracting water and nutrients from their hosts. Mistletoe is characterized by its green leaves and white berries, which are often associated with winter traditions and holiday celebrations. Mistletoe plays a role in various ecosystems, providing food for birds and other wildlife. The berries are particularly attractive to birds, which help in the plant's reproduction by spreading its seeds. Additionally, mistletoe has been used in traditional medicine, although scientific evidence supporting its health benefits is limited.