Viscum is a genus of plants also known as mistletoe. Native to Europe and Asia, these parasitical plants are known for their traditional use in Christmas decor and medicine. Apart from Viscum, the genus also goes by the names Loranthus and Taxillus due to their similar characteristics. Common synonyms for mistletoe include birdlime, allheal, golden bough, and devil's fuge. It's important to note that there are many different species of mistletoe, and some may have different common names depending on their location or specific traits. Regardless of the name, mistletoe is considered an important plant in many cultures, and has been used for centuries in both traditional medicine and festive customs.