槲寄生 (kugizai) is a type of parasitic plant that grows on trees and shrubs. It is known for its green, leafy appearance and is often found in forests. The plant attaches itself to the host tree, drawing nutrients and water from it, which can sometimes weaken the host. 槲寄生 is commonly associated with the winter holiday season, particularly in Western cultures, where it is used as a decorative element. People often hang it in doorways, and it is traditional to kiss under the mistletoe, which is another name for this plant.