Mistletoe ) Nakai, alias: North Parasite, Mulberry Parasite, Willow Parasite, Yellow Parasite, Frozen Green, Parasite, is a shrub plant of the genus Viscum belonging to the family Taxillidae, which is usually parasitic on Quercus acutissima, apple tree, poplar and pine tree, and is harmful to the host, with flexible and green stems. The leaves are oblanceolate, leathery and light green. In early spring, small stalks are separated between leaves, and small flowers are light yellow, unisexual and dioecious. The fruit is translucent and yellow-green. The pulp is sticky.

The stems and branches of leafy plants can be used as medicine, which has the functions of relaxing tendons and activating collaterals, promoting blood circulation and removing blood stasis. Can be used for treating pain of bones and muscles, limb contracture, lumbago and backache, and traumatic injury. The mistletoe extract has the effects of nourishing liver and kidney, strengthening bones and muscles, expelling wind and removing dampness, and preventing miscarriage. The mistletoe extract can improve microcirculation, and its total alkaloids also have anti-tumor effects. In addition, mistletoe has a profound cultural heritage, and if it is regarded as sacred by British Druids, it has a special meaning in English.