Schlumbergera gaertneri, formerly Hatiora gaertneri, is a species of epiphytic cactus which belongs to the tribe Rhipsalideae within the subfamily Cactoideae of the Cactaceae.
Either Christmas Cactus or Easter Cactus, but it is neither season so … Schlumbergera it is. (now, how to pronounce that)
Kim's Life Tour of the World 