Yes, a zygo cactus is the same as a Christmas cactus. The scientific name for this plant is Schlumbergera bridgesii. It is an epiphytic cactus that is native to the forests of southeastern Brazil. The name "zygo" comes from the Greek word for "yoke," which refers to the way the stems of the plant are joined together. The Christmas cactus is known for its beautiful flowers, which typically bloom during the winter months, making it a popular holiday decoration.