Schlumbergera, a.k.a. the Christmas Cactus. These cacti are species found in the coastal mountains of south-eastern Brazil. Plants grow on trees or rocks in habitats which are generally shady with high humidity and can be quite different in appearance from their desert-dwelling cousins. Hybrids like this one are popular house plants.Canon 7D, 1/80 sec @ f/16.0, ISO 800, 100mm macro lens, two LED Litepanels used for illumination.