Easter Cactus

"Rhipsalidopsis gaertneri", synonyms "Schlumbergera gaertneri" and "Hatiora gaertneri", is a species of epiphytic cactus which belongs to the tribe Rhipsalideae within the subfamily Cactoideae of the Cactaceae. Together with the hybrid with "R. rosea", "Rhipsalidopsis" × "graeseri", it is known, in English speaking countries in the Northern Hemisphere, as Easter cactus or Whitsun cactus and is a widely cultivated ornamental plant. It has received the Royal Horticultural Society's Award of Garden Merit.