Sunrise cactus is named so because of the fact that the flowers only open during the day when it is bright and sunny, they will close during the night. The botanic names are Rhipsalidopsis gaertneri, Rhipsalis gaertneri, Hotiora gaertneri or Epiphyllum gaertneri. On the northern parts of the world like in United States it is also known as Easter cactus.
We only have one variety of Sunrise cactus plant with starry mauve pink blooms. To me personally, it is the hardest and the fussiest plant to grow. It is prone to suddenly wilt away for no apparent reason. Few years ago, I tried to save the mother plant from wilting and rotting away by saving some healthy leaf cutting. But up to now, it is only one little pot survives and to my surprise it is blooming beautifully.