Yes, a zygo cactus is also known as a Christmas cactus because of its unique flowering habit. It blooms around the holiday season, typically during the fall and winter months, which is why many people associate it with Christmas. The plant's distinctive red, pink, or white flowers make it a popular holiday decoration. Additionally, the name "zygo" comes from the Greek word "zygon," which means "pair," referring to the fact that the plant produces flowers in pairs.